What is negative acceleration ?

What is negative acceleration ?
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1 Answer

Answer :

We know that the rate of change of velocity of an object over time is called acceleration. When the velocity of an object decreases with time, the rate of velocity reduction is called negative acceleration. It is also called mandana.
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Related questions

If the gradient of a graph is negative, then the acceleration is A. positive B. negative C. zero D. 1

Description : If the gradient of a graph is negative, then the acceleration is A. positive B. negative C. zero D. 1

Last Answer : negative

If the resultant force acting on a body of constant mass is zero, the body's acceleration is: w) increasing x) decreasing y) always zero z) negative.

Description : If the resultant force acting on a body of constant mass is zero, the body's acceleration is: w) increasing x) decreasing y) always zero z) negative.

Last Answer : ANSWER: Y -- ALWAYS ZERO 

The average person passes out at an acceleration of 7g (that is, seven times the gravitational acceleration on Earth). Suppose a car is designed to accelerate at this rate. How much time (in seconds) would be required for the car to accelerate from rest to 56.3 miles per hour?

Description : The average person passes out at an acceleration of 7g (that is, seven times the gravitational acceleration on Earth). Suppose a car is designed to accelerate at this rate. How much time (in seconds) would be required for the car to accelerate from rest to 56.3 miles per hour?

Last Answer : I think the Fluther policy is not to help students with their homework, but I always hate this kind of problem and it seems to me that the g is just in there to provide some background and to confuse you.

What is acceleration ?

Description : What is acceleration ?

Last Answer : Acceleration gain.

What is meant by gravitational acceleration of the moon 1.63ms-2 ?

Description : What is meant by gravitational acceleration of the moon 1.63ms-2 ?

Last Answer : The gravitational acceleration of the moon is 1.63ms-2 . When an object is thrown upwards from the lunar surface, its velocity decreases by 1.63ms-2 per second. That is, the object is attracted to the center of the moon at an acceleration of 1.63ms-2 .

What is gravitational acceleration ?

Description : What is gravitational acceleration ?

Last Answer : Gravitational acceleration: The rate of increase in the velocity of an object falling freely on the surface of the earth under the influence of a gravitational ball is called gravitational acceleration. It is ... with g . This is equal to the dimension and the unit of acceleration and the unit.

What is the acceleration of a moving object ? Explain. ?

Description : What is the acceleration of a moving object ? Explain. ?

Last Answer : An object moving at the same speed ‍ there is no change in the initial velocity ( u) and the end velocity ( v) at any given time. We know that the rate at which an object changes over time is called acceleration. Acceleration , a = v-ut = u-ut = 0t = o So there is no acceleration of a moving object.

Explain the acceleration of an object moving in a circular path. ?

Description : Explain the acceleration of an object moving in a circular path. ?

Last Answer : We know that the acceleration of an object moving in a circular path is called angular acceleration. That is, the rate of change of velocity of an object moving in a circular path with time is called angular acceleration.

Explains the acceleration of an object in a circular and akabaka way. ?

Description : Explains the acceleration of an object in a circular and akabaka way. ?

Last Answer : : We know that the rate of asymmetric growth over time is called acceleration. Acceleration is generally of two types - 1. Smooth acceleration , 2. Uneven acceleration. Again, if the velocity ... , bicycles , rickshaws go on the Akabaka road so their acceleration is uneven acceleration. Thank you!

Explain whether there is acceleration of a rotating object at a balanced speed in a circular motion ?

Description : Explain whether there is acceleration of a rotating object at a balanced speed in a circular motion ?

Last Answer : : In a circular path, there is no acceleration of the rotating object at a balanced speed The rate of change of unequal velocity is called acceleration. So if the velocity is balanced , there will be no acceleration Be it in a circular way or in a straight way.

What is the value of gravitational acceleration ( g) in the center of the earth ?

Description : What is the value of gravitational acceleration ( g) in the center of the earth ?

Last Answer : The value of gravitational acceleration ( g) in the center of the earth is zero (0).

Where is the highest value of gravitational acceleration 'g ' ?

Description : Where is the highest value of gravitational acceleration 'g ' ?

Last Answer : The value of gravitational acceleration 'g' is highest in the polar region

What is the relation between mass and acceleration if the force applied to an object is constant ?

Description : What is the relation between mass and acceleration if the force applied to an object is constant ?

Last Answer : The lower the mass, the higher the acceleration.

What is the level of acceleration ?

Description : What is the level of acceleration ?

Last Answer : Acceleration level LT-2

Why is the acceleration of a moving particle zero ?

Description : Why is the acceleration of a moving particle zero ?

Last Answer : : If the value and direction of velocity of a particle remains unchanged during motion, that is, if the particle travels equal distances at the same time in a certain direction, then the velocity of ... there is no acceleration. This is why the acceleration of a particle moving at zero is zero.

What is acceleration ?

Description : What is acceleration ?

Last Answer : Acceleration is the rate at which the velocity of an object changes over time.

What is the unit of acceleration ?

Description : What is the unit of acceleration ?

Last Answer : unit of acceleration ms-

What is gravitational acceleration ?

Description : What is gravitational acceleration ?

Last Answer : Gravitational acceleration is the rate of increase in the velocity of an object falling freely on the surface under the influence of a gravitational ball .

What is the degree of gravitational acceleration ?

Description : What is the degree of gravitational acceleration ?

Last Answer : Gravitational acceleration is a type of acceleration , so its magnitude will be LT −2

What is balanced acceleration ?

Description : What is balanced acceleration ?

Last Answer : If the velocity of an object keeps increasing at the same rate all the time in a certain direction, then the rate of increase of that velocity is called balanced acceleration.

What does gravitational acceleration mean ?

Description : What does gravitational acceleration mean ?

Last Answer : Gravitational acceleration is the rate of increase of velocity of an object falling from above. Gravity causes an object released from above to run towards the surface, and the closer it gets ... at which velocity increases per second during a fall is called 'gravitational acceleration' in physics.

The sensation of weightlessness in a spacecraft in an orbit is due to the – (1) Absence of gravity outside (2) Acceleration in the orbit which is equal to the acceleration due to gravity outside (3) Presence of gravity outside but not inside the spacecraft (4) Fact that spacecraft in the orbit has no energy

Description : The sensation of weightlessness in a spacecraft in an orbit is due to the - (1) Absence of gravity outside (2) Acceleration in the orbit which is equal to the acceleration due to gravity outside ... of gravity outside but not inside the spacecraft (4) Fact that spacecraft in the orbit has no energy

Last Answer : (2) Acceleration in the orbit which is equal to the acceleration due to gravity outside Explanation: Weightlessness in space is caused by the simple physical factors that cause the limitation of gravity. ... . Many people believe that a lack of gravity is the root cause for weightlessness in space.

What is inertia? (1) Tendency to resist change in the current state (2) Tendency to impart acceleration to a body (3) Tendency to bring a body to rest (4) Tendency to change its current state

Description : What is inertia? (1) Tendency to resist change in the current state (2) Tendency to impart acceleration to a body (3) Tendency to bring a body to rest (4) Tendency to change its current state

Last Answer : (1) Tendency to resist change in the current state

If we want to calculate the pressure of a liquid at the bottom of a vessel, the quantity which is not required to determine it, is – (1) Height of the liquid column (2) Surface area of the bottom of the vessel (3) Density of the liquid (4) Acceleration due to gravity at the bottom of the vessel

Description : If we want to calculate the pressure of a liquid at the bottom of a vessel, the quantity which is not required to determine it, is – (1) Height of the liquid column (2) Surface area of the bottom of the vessel (3) Density of the liquid (4) Acceleration due to gravity at the bottom of the vessel

Last Answer : (2) Surface area of the bottom of the vessel Explanation: The pressure exerted by a static fluid depends only upon the depth of the fluid, the density of the fluid, and the acceleration of gravity. Static fluid pressure does not depend on the shape, total mass, or surface area of the liquid.

If we want to calculate the pressure of a liquid at the bottom of a vessel, the quantity which is not required to determine it, is – (1) Height of the liquid column (2) Surface area of the bottom of the vessel (3) Density of the liquid (4) Acceleration due to gravity at the bottom of the vessel

Description : If we want to calculate the pressure of a liquid at the bottom of a vessel, the quantity which is not required to determine it, is – (1) Height of the liquid column (2) Surface area of the bottom of the vessel (3) Density of the liquid (4) Acceleration due to gravity at the bottom of the vessel

Last Answer : (2) Surface area of the bottom of the vessel Explanation: The pressure exerted by a static fluid depends only upon the depth of the fluid, the density of the fluid, and the acceleration of gravity.

The apparent weight of a person in a lift which is moving down with uniform acceleration is _______. (1) greater than the weight when the person is stationary (2) twice the weight when the person is stationary (3) less than the weight when the person is stationary (4) same as the weight when the person is stationary

Description : The apparent weight of a person in a lift which is moving down with uniform acceleration is _______. (1) greater than the weight when the person is stationary (2) twice the weight when the person ... than the weight when the person is stationary (4) same as the weight when the person is stationary

Last Answer : (3) less than the weight when the person is stationary

For body moving with non-uniform velocity and uniform acceleration – (1) Displacement – Time graph (2) Displacement – Time graph (3) Velocity - Time graph is non-linear (4) Velocity - Time graph is linear

Description : For body moving with non-uniform velocity and uniform acceleration – (1) Displacement – Time graph (2) Displacement – Time graph (3) Velocity - Time graph is non-linear (4) Velocity - Time graph is linear

Last Answer : (2) Displacement - Time graph Explanation: Displacement-time graph is non linear. Linear motion (also called rectilinear motion) is motion along a straight line, and can therefore be described ... linear motion with variable velocity or non-zero acceleration. The motion of a particle (a point

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Description : The motion of a body around a circular path is an example of – (1) Uniform velocity, variable acceleration (2) Uniform speed, uniform velocity (3) Uniform speed, variable velocity (4) Uniform speed, variable acceleration

Last Answer : (1) Uniform velocity, variable acceleration Explanation: Uniform circular motion occurs when a body moves in a circular path with constant velocity.

The apparent weight of a man in a lift is less the real weight when – (1) the lift is going up with an acceleration (2) the lift is going down with uniform speed (3) the lift is going up with uniform speed (4) the lift is going down with an acceleration

Description : The apparent weight of a man in a lift is less the real weight when – (1) the lift is going up with an acceleration (2) the lift is going down with uniform speed (3) the lift is going up with uniform speed (4) the lift is going down with an acceleration

Last Answer : (4) the lift is going down with an acceleration Explanation: If the lift accelerates downwards with acceleration a, then the apparent weight of the man standing in the lift will be less than the ... upwards with acceleration, then the apparent weight of the man will be greater than his true weight.

If a body moves with a constant speed in a circle – (1) no work is done on it (2) no force acts on it (3) no acceleration is produced in it (4) its velocity remains constant

Description : If a body moves with a constant speed in a circle – (1) no work is done on it (2) no force acts on it (3) no acceleration is produced in it (4) its velocity remains constant

Last Answer : (4) its velocity remains constant Explanation: A body moving with a constant speed in a circle is an example of uniform circular motion. The velocity vector is constant in magnitude but ... magnitude or the direction constitutes a change in the velocity which leads to change in acceleration.

A person can jump higher on the moon's surface than on the earth because – (1) the moon's surface is rough (2) the acceleration due to gravity in moon is smaller than that on the earth. (3) the moon is cooler than earth (4) the moon has no atmosphere

Description : A person can jump higher on the moon's surface than on the earth because – (1) the moon's surface is rough (2) the acceleration due to gravity in moon is smaller than that on the earth. (3) the moon is cooler than earth (4) the moon has no atmosphere

Last Answer : (2) the acceleration due to gravity in moon is smaller than that on the earth. Explanation: The acceleration due to the gravitational field of moon (g' = 1.62631 ms-2) is one-sixth of the acceleration due ... earth. It is due to this reason; a man can jump six times higher on moon than on earth.

If lift is going up with acceleration, the apparent weight of a body is - (1) may be more or less than true weight (2) equal to the true weight (3) less than the true weight (4) more than the true weight

Description : If lift is going up with acceleration, the apparent weight of a body is - (1) may be more or less than true weight (2) equal to the true weight (3) less than the true weight (4) more than the true weight

Last Answer : (4) more than the true weight Explanation: If lift is going up with acceleration, the apparent weight of a body is more than the true weight.

Acceleration is – (1) Inversely proportional to force (2) Inversely proportional to mass (3) Directly proportional to mass (4) Directly proportional to force

Description : Acceleration is – (1) Inversely proportional to force (2) Inversely proportional to mass (3) Directly proportional to mass (4) Directly proportional to force

Last Answer : (1) Inversely proportional to force Explanation: Acceleration, in physics, is the rate of change of velocity of an object with respect to time. An object's acceleration is the net result of ... second law of motion states that acceleration is directly proportional to net force when mass is constant.

A particle is thrown vertically upward. When it reaches the highest point, it has – (1) a downward acceleration (2) an upward acceleration (3) a downward velocity (4) a horizontal velocity

Description : A particle is thrown vertically upward. When it reaches the highest point, it has – (1) a downward acceleration (2) an upward acceleration (3) a downward velocity (4) a horizontal velocity

Last Answer : (1) a downward acceleration Explanation: When a particle is thrown vertically upwards in space, it will experience constant acceleration towards the ground (irrespective of the direction in which it ... point, it has zero velocity but has downward acceleration equal to acceleration due to gravity.

If a lift is going up with acceleration, the apparent weight of a body is - (1) More or less the true weight (2) Equal to the true weight (3) Less than the true weight (4) More than the true weight

Description : If a lift is going up with acceleration, the apparent weight of a body is - (1) More or less the true weight (2) Equal to the true weight (3) Less than the true weight (4) More than the true weight

Last Answer : (4) More than the true weight Explanation: If a lift is going up with acceleration, the apparent weight of a body is more than the true weight.

The dimension MLT⁻² corresponds to (1) force (2) work done (3) acceleration (4) velocity

Description : The dimension MLT⁻² corresponds to (1) force (2) work done (3) acceleration (4) velocity

Last Answer : (1) force

During which of the following operating conditions of an auto-mobile, carbon monoxide content in exhaust gas is maximum? (1) Acceleration (2) Cruising (3) Idle running (4) Deacceleration

Description : During which of the following operating conditions of an auto-mobile, carbon monoxide content in exhaust gas is maximum? (1) Acceleration (2) Cruising (3) Idle running (4) Deacceleration

Last Answer : (3) Idle running Explanation: High Carbon Monoxide (CO) content in exhaust gas of automobiles usually indicate a fuel mixture richer than ideal (rich mixture - air fuel ratio below 14.7).

The first equation of motion gives the relation between : (1) Position and time (2) Position and Velocity (3) Velocity and time (4) Velocity and acceleration

Description : The first equation of motion gives the relation between : (1) Position and time (2) Position and Velocity (3) Velocity and time (4) Velocity and acceleration

Last Answer : (3) Velocity and time Explanation: The equation v = u + at is called Newton's first equation of motion, where, u = Initial velocity, v = Final velocity, a = acceleration and t = time.

Why is weightlessness experienced while orbiting the earth in space ships? (1) Inertia (2) Acceleration (3) Zero gravity (4) None of these

Description : Why is weightlessness experienced while orbiting the earth in space ships? (1) Inertia (2) Acceleration (3) Zero gravity (4) None of these

Last Answer : (4) None of these Explanation: The reason astronauts experience weightlessness which orbiting the earth in spaceships is that they are in free fall. A spacecraft in orbit is falling towards the Earth, because ... in its orbit fast enough that the path it follows is a curve that is a closed ellipse.

What is impulse equal to? (1) Change in momentum (2) Change in force (3) Change in velocity (4) Change in acceleration

Description : What is impulse equal to? (1) Change in momentum (2) Change in force (3) Change in velocity (4) Change in acceleration

Last Answer : (1) Change in momentum Explanation: Impulse is a quantity that describes the effect of a net force acting on an object. The impulsemomentum theorem states that the change in momentum of an object equals the impulse applied to it.

An object covers distance which is directly proportional to the square of the time. Its acceleration is – (1) increasing (2) decreasing (3) zero (4) constant

Description : An object covers distance which is directly proportional to the square of the time. Its acceleration is – (1) increasing (2) decreasing (3) zero (4) constant

Last Answer : (4) constant Explanation: When an object covers distance which is directly proportional to the square of the time, its acceleration is constant. This is seen in the cases of falling objects. This connection between time and distance was first observed by Galileo.

If a body weighs 12N on the surface of the earth, how much will it weigh on the surface of the moon where acceleration due to gravity is only one-sixth of that on earth's surface? (1) 12N (2) 2N (3) 10N (4) 6N

Description : If a body weighs 12N on the surface of the earth, how much will it weigh on the surface of the moon where acceleration due to gravity is only one-sixth of that on earth's surface? (1) 12N (2) 2N (3) 10N (4) 6N

Last Answer : (2) 2N Explanation: Weight is mass x g. Since mass is constant and g is only 16thof that on the earth. The weight on the moon is only 16th of that on the earth.

The rate of change of displacement is called: (1) Acceleration (2) Speed (3) Distance (4) Velocity

Description : The rate of change of displacement is called: (1) Acceleration (2) Speed (3) Distance (4) Velocity

Last Answer : (4) Velocity Explanation: In considering motions of objects over time the instantaneous velocity of the object is the rate of change of the displacement as a function of time.

If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same - (1) velocity (2) momentum (3) acceleration (4) kinetic energy

Description : If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same - (1) velocity (2) momentum (3) acceleration (4) kinetic energy

Last Answer : (2) momentum Explanation: If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same momentum.

A body moving in a circular path with a constant speed has a – (1) constant velocity (2) constant acceleration (3) constant kinetic energy (4) constant displacement

Description : A body moving in a circular path with a constant speed has a – (1) constant velocity (2) constant acceleration (3) constant kinetic energy (4) constant displacement

Last Answer : (3) constant kinetic energy Explanation: In circular motion, the magnitude of the velocity of the body is constant but the direction is constantly changing. This means that, even though the speed is ... accelerating. At any instant, the direction of the velocity is a tangent to the circular path.

When net torque is zero, will be constant - (1) force (2) angular momentum (3) linear momentum (4) acceleration

Description : When net torque is zero, will be constant - (1) force (2) angular momentum (3) linear momentum (4) acceleration

Last Answer : (2) angular momentum Explanation: Since a torque (rate of change of angular momentum analogous to force) applied over time is equivalent to a change in angular momentum, then if torque is zero, angular momentum is constant.

Who among the following is the scalar quantity______. (1) force (2) pressure (3) velocity (4) acceleration

Description : Who among the following is the scalar quantity______. (1) force (2) pressure (3) velocity (4) acceleration

Last Answer : (2) pressure Explanation: Pressure is a scalar quantity. It relates the vector surface element with the normal force acting on it.

As we go from Equator to North pole the value of `S, the acceleration due to gravity (1) remains the same (2) decreases (3) increases (4) None of the above

Description : As we go from Equator to North pole the value of `S, the acceleration due to gravity (1) remains the same (2) decreases (3) increases (4) None of the above

Last Answer : (3) increases Explanation: The acceleration due to gravity of earth is the rate of increase of velocity of a body falling freely towards the earth. At a given place, the value of acceleration due to gravity ... out at the equator. The value of 'g' is minimum at the equator and maximum at the poles.

Which of the following is not a vector quantity? (1) Acceleration (2) Electric current (3) Force (4) Velocity

Description : Which of the following is not a vector quantity? (1) Acceleration (2) Electric current (3) Force (4) Velocity

Last Answer : (2) Electric current Explanation: For a physical quantity to be termed a vector quantity, having magnitude and direction is not enough.

The spokes used in the wheel of a bicycle increase its – (1) Moment of inertia (2) Velocity (3) Acceleration (4) Momentum

Description : The spokes used in the wheel of a bicycle increase its – (1) Moment of inertia (2) Velocity (3) Acceleration (4) Momentum

Last Answer : (1) Moment of inertia Explanation: A spoke is one of some number of rods radiating from the center of a wheel (the hub where the axle connects), connecting the hub with the round ... synthetic fibers, are also occasionally used. Metal spokes used in bicycles also increase the moment of inertia.