Description : Certain force acting on a 20 Kg mass changes its velocity from 5 m/s to 2 m/s. Calculate the work done by the force ? -Physics 9th
Last Answer : Certain force acting on 20 kg mass changes its velocity from 5 m s-1 to 2 m s-1. Calculate the work done by the force. (E k)2 = (1 )/2x 20 — (2)2 = 40 J.
Description : Why Does that mass of an object affect the strength of the gravitational force of the earth acting on it?
Last Answer : Feel Free to Answer
Description : What is the force on an object that goes from 35 ms to 85 ms in 20 second and has a mass of 148 kg?
Description : An object with a mass of 5 kilograms is a distance of 5 meters above the surface of the earth. If the acceleration due to gravity is 10 meters per second squared, the potential energy of the object relative to the ... is: w) 10 joules x) 20 joules y) 100 joules z) 250 joules e) none of the above
Last Answer : ANSWER: Z -- 250 JOULES
Description : Acceleration of a rocket having mass 5000 kg and resultant force acting on it is 200,000 N is A. 50 m s-2 B. 56 m s-2 C. 70 m s-2 D. 40 m s-2
Last Answer : . 40 m s-2
Description : What will happened to the acceleration of an object if you double both the mass and the unbalanced force acting on it?
Last Answer : If both the mass and the net force on an object are doubled,then the object's acceleration will not change.
Description : A force of 15 newtons is acting on an object which has a mass of 3 kilograms. If this is the only force acting on the object, what is the acceleration of the object?
Last Answer : ANSWER: 5 METERS PER SECOND SQUARED
Description : What is the acceleration of an object that has a force of N and the mass of kg?
Last Answer : What is the answer ?
Description : In a construction site, a crane lifts 1000 kg of concrete mix to roof top at a height of 20 meters in 50 seconds. If the value of gravity 'g' due to earth is 10 m s-2, the power of elevator will be. -Physics
Last Answer : 4 KW (kilowatt)
Description : Only force acting on a bouncing ball is A. gravity B. weight of ball C. friction D. a and b both
Last Answer : a and b both
Description : A couple consists of a force P acting at a point A whose coordinates are (-1,2,4) m and force - F acting at a point whose coordinates are (2,3, -2)m. If F = 3i + 2j - 4k in kg units the moment of the couple in kg - m ... .8i - 6j - 3k b.12i - 3j + k c.16i - 12j - 6k d.4i - 3j + k e.8i + 5j + 3k
Last Answer : a. 8i - 6j - 3k
Description : Average force acting on 900 kg car if it's velocity ranges from 5 m s-1 to 30 m s-1 in 12 s is A. 1875 N B. 2000 NC. 3000 N D. 1560 N
Last Answer : 1875 N
Description : What will result from an unbalanced force acting on an object?
Last Answer : Advantages and disadvantages of inertia
Description : According to newton second law of motion, the acceleration of an object equals the net force acting on the object divide by the object?
Last Answer : Mass.
Description : When falling object reaches terminal velocity, the net force acting on it is?
Last Answer : When an object is not accelerating or decelerating, it has a net force of zero.
Description : Is there a force acting on an object at rest?
Last Answer : There CAN be, as long as the force is being counterd by an equal and opposite force.
Description : Resultant force acting on object and rate of change of linear momentum are A. inversely related B. not related at all C. directly related D. directly proportional
Last Answer : directly related
Description : Object is in equilibrium if resultant force acting on it is A. increasing B. decreasing C. zero D. becomes constant
Last Answer : zero
Description : A square object of 4 mm is subjected to a force of 3000 N. What is the maximum allowable shear stress acting on it? a. 250.14 mm2 b. 281.25 mm2 c. 400.32 mm2 d. 500 mm2
Last Answer : b. 281.25 mm2
Description : A force of 100 Newtons acts for 0.5 seconds on a body of mass 20 kg which is initially at rest. The velocity attained by the body is a.20 m/s b.5 m/s c.2.5 m/s d.0.5 m/s e.107 dynes
Last Answer : c. 2.5 m/s
Description : If A bicycle has a mass of 20 kg. A small car has a mass of 1000 kg. A force is applied to accelerate the car from a standing position to a speed of 1 ms. If the same force that was applied to the car?
Last Answer : Need answer
Description : Each 1 kg mass experiences force of A. 7 N B. 9.81 N C. 20 N D. 100 N
Last Answer : 9.81 N
Description : An impulse of 10 kilogram-meter per second acting on an object whose mass is 5 kilogram will cause a change in the objects velocity of: w) 0.5 meters per second x) 2 meters per second y) 10 meters per second z) 50 meters per second
Last Answer : ANSWER: X -- 2 METERS PER SECOND
Description : A particle is of wieght 8 kg. When it is allowed to fall under the force of gravity its momentum at the time t = 2 sec would be a.8 kg sec b.32 kg sec c.2 kg sec d.16 kg sec e.48 kg sec
Last Answer : d. 16 kg sec
Description : When your mass is 96 kg. The acceleration due to gravity is 9.8 ms 2 . How much work against gravity do you do when you climb a flight of stairs 3.8 m high Answer in units of J.?
Last Answer : 4
Description : The static deflection of a spring under gravity, when a mass of 1 kg is suspended from it, is 1 mm. Assume the acceleration due to gravity g = 10 m/s^2. The natural frequency of this spring-mass system (in rad/s) is A 100 B 150 C 200 D 250
Last Answer : A 100
Description : If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its (A) Specific weight (B) Specific mass (C) Specific gravity (D) Specific density
Last Answer : Answer: Option C
Description : The 28 days cube strength of mass concrete using aggregates of maximum size 5 cm for gravity dams should be (A) Between 150 to 300 kg/cm2 (B) Between 350 to 600 kg/cm2 (C) Between 150 to 500 kg/cm2 (D) Below 200 kg/cm2
Last Answer : Answer: Option D
Description : Is Weight is the force of gravity on an object?
Last Answer : Yes, weight is the force of gravity on an object. Which is why you would weigh less on the Moon. An object on the Moon will weigh only 16.6% of what they weigh on the Earth.
Description : Are the normal force and the force of gravity on an object on a surface always equal in magnitude?
Last Answer : Yes, they are.
Description : How does the unbalanced force of gravity affect the horizontal and vertical velocity of an object in projectile?
Last Answer : In the absence of air resistance, the force of gravity has noeffect on the horizontalcomponent of a projectile's velocity, and causes the verticalcomponent of its velocityto increase by 9.8 meters (32.2 feet) per second downward forevery second of its flight.
Description : Why do we need to know the centre of mass of an object? For which objects, its position may differ from that of the centre of gravity?
Last Answer : Why do we need to know the centre of mass of an object? For which objects, its position may differ from ... g = 10 m s-2, unless, otherwise stated.
Description : A hydrometer indicates specific gravity by comparing the _____________. A. density of a substance in water with the density of the same substance in air B. differences in weight between water and the ... of an object in water with the buoyancy of the same object in the liquid being measured
Last Answer : Answer: D
Description : Point where all weight of object acts is called A. central point B. center of gravity C. edge D. center of mass
Last Answer : center of gravity
Description : The earth's gravitational force field is said to be conservative force field because a.The work acted by the earth's gravitational field on a particle is independent on the path traced out by ... directional component always acting normal to a body e.The value of gravitational force rise is fixed
Last Answer : a. The work acted by the earth's gravitational field on a particle is independent on the path traced out by the particle
Description : When a body is immersed in a liquid, the force acting on it is – (1) Upthrust (2) Weight (3) Mass (4) Both (1) and (2)
Last Answer : (4) Both (1) and (2) Explanation: According to the Principle of Flotation, when a body is immersed in a fluid, two forces act on it: ( 1) The weight of the body acting vertically downward ... gravity of the fluid displaced, i.e., centre of buoyancy. The upthrust is also termed as buoyant force.
Description : The acceleration of a particular body is directly proportional to the resultant force acting on it & inversely proportional to its mass. a. Pascal's Law b. Joule's Law c. Newton's Law d. None of the above
Last Answer : Newton's Law
Description : A railway wagon moving with a speed of 1.5m/s is brought to rest by bumper consisting of two springs. Mass of wagon is 100kg. The springs are compressed by 125mm. Calculate the maximum force acting on each spring. a) 1200N b) 1500N c) 1800N d) 2000N
Last Answer : c) 1800N
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
Description : Newton's second law states that the net force acting on a body is equal to the body's time rate of change of: w) acceleration x) mass y) momentum z) inertia
Last Answer : ANSWER: Y -- MOMENTUM
Description : If the resultant force acting on a body of constant mass is zero, the body's momentum is: w) increasing x) decreasing y) always zero z) constant
Last Answer : ANSWER: Z -- CONSTANT
Description : When a body is immersed in a liquid, the force acting on it is (1) Upthrust (2) Weight (3) Mass (4) Both (1) and (2)
Last Answer : Both (1) and (2)
Description : In Joule's experiment, an insulated container contains 20 kg of waterinitially at 25°C. It is stirred by an agitator, which is made to turn by a slowly falling body weighing 40 kg through a height of 4 m. The process is repeated ... temperature of water (in °C) is (A) 40.5 (B) 34.4 (C) 26.8 (D) 25
Last Answer : (B) 34.4
Description : what is the acceleration of a 1.4 kg object if the gravitational force pulls downward on it , but air resistance pushes upward on it with a force of 2.5 N?
Last Answer : if g = 10(m/s)/s then force down = ma = 10*1.4=14n14n-2.5n=11.5na=f/m = 11.5/1.4 = 8.21 (m/s/)s
Description : What centripetal force is needed to keep a kg object moving at a constant speed of ms in a circle having a radius of 4 m?
Description : Find the energy possessed by an object of mass 10 kg when it is at a height of 2 m above the ground. Given, g = 10 m/s2 -Physics 9th
Last Answer : Given, Mass of object m=10kg. Height h=6m. Acceleration due to gravity g=9.8m/s2 Potential Energy of object P.E=m×g×h ⇒mgh=10×9.8×6=98×6 =588J Energy possessed by the object is 588Joule.
Description : Calculate the coefficient of static friction for an object of mass 50 kg placed on horizontal table
Last Answer : Calculate the coefficient of static friction for an object of mass 50 kg placed on horizontal ... object just moves when spring balance shows 50N.
Description : A planet has mass 6.4 × 10^24 kg and radius 3.4 × 10^6 m. Calculate energy required to remove on object of mass 800 kg
Last Answer : A planet has mass 6.4 1024 kg and radius 3.4 106 m. Calculate energy required to remove ... 800 kg from the surface of the planet to infinity.
Description : Lin an experiment to determine the volume of an object, mass and density are recorded as m = (5 ± 0.15) kg and p = (5 ± 0.2) kg m^3 respectively.
Last Answer : Lin an experiment to determine the volume of an object, mass and density are recorded as ... Calculate percentage error in the measurement of volume.