Description : The average speed of a moving object during a given interval of time is always: A. the magnitude of its average velocity over the interval B. the distance covered during the time ... its acceleration multiplied by the time interval E. one-half its acceleration multiplied by the time interval
Last Answer : B. the distance covered during the time interval divided by the time interval (Answer)
Description : Explain the velocity-tune graphs of an object: i) Moving with zero acceleration. ii) Moving with constant positive acceleration.
Last Answer : Explain the velocity-tune graphs of an object: i) Moving with zero acceleration. ii) ... acceleration. iv) Moving with non-uniform acceleration.
Description : What is the initial velocity of an object if it is moving 10 meters per second after 2 seconds with a constant acceleration of 4 meters per second squared?
Last Answer : ANSWER: 2 METERS PER SECOND
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
Description : In the case of steady flow of a fluid, the acceleration of any fluid particle is (A) Constant (B) Variable (C) Zero (D) Zero under limiting conditions
Last Answer : Answer: Option C
Description : In case of type-1 system steady state acceleration is?
Last Answer : In case of type-1 system steady state acceleration is infinity.
Description : 3. Draw the ray diagram in each case to show the position and nature of the image formed when the object is placed: -Chemistry-10
Last Answer : Answer. Nature of image: Real, inverted and same size image is formed at the centre of curvature. Nature of image: Virtual, enlarged and erect image is formed behind the mirror. Nature of image: ... image: Virtual, erect and diminished image is formed between O and F on the same side of object.
Description : Draw the ray diagram in each case to show the position and nature of the image formed when the object is placed: (i) at the centre of curvature of a concave mirror (ii) between the pole P and focus F of ... front of a convex mirror (iv) at 2F of a convex lens (v) in front of a concave lens -Physics
Last Answer : Answer. Nature of image: Real, inverted and same size image is formed at the centre of curvature. Nature of image: Virtual, enlarged and erect image is formed behind the mirror. Nature of image: Virtual ... : Virtual, erect and diminished image is formed between O and F on the same side of object.
Description : A ball A of mass 0.25 kg moving on a smooth horizontal table with a velocity of 10 m/s strikes an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after the impact will be a.2.5 m/s b.zero c.5 m/s d.10 m/s e.107 dynes
Last Answer : c. 5 m/s
Description : A ball of mass 1 kg moving with a velocity of 2 m/sec collides directly with a stationary ball of mass 2 kg. If the first ball comes to rest after the impact the velocity of second ball after impact will be a.1.5 m/sec b.0.5 m/sec c.Zero d.2 m/sec e.1.0 m/sec
Last Answer : e. 1.0 m/sec
Description : Bernoulli's principle shows that, at points in a moving fluid where the potential energy change is very small A. the pressure is low where the velocity is low and similarly, the pressure is ... of the moving fluid D. pressure remain independent of the speed of the stationary fluid
Last Answer : the pressure is low where the velocity is high and conversely, the pressure is high where the velocity is low
Description : A freight car weighing 20 tons and moving at a speed of 7 miles per hour on a horizontal track collides and couples with a stationary car that weighs 15 tons. Neglecting friction, determine the velocity of the coupled cars.
Last Answer : ANSWER: 4 MILES PER HOUR
Description : Under which circumstances will have zero velocity and be still accelerating? a.The bob of a simple pendulum when at its mean position b.107 dynes c.A steamer while taking a turn d.A ball at its highest point of its rise when thrown up e.Tyres of a stationary automobile
Last Answer : d. A ball at its highest point of its rise when thrown up
Description : Consider the following assumption made in the analysis of a jet impinging normally on a moving plate to introduce the principle of moment of momentum: 1. Friction between jet and plate is neglected. 2. Flow is steady 3. Impinging momentum of ... b) 1, 2 & 3 only (c) 2, 3 and 4 only (d) 1, 2, 3 & 4
Last Answer : (a) 1, 2 & 4 only
Description : An electron moving with a velocity of 5 10 3 m / s enters into a uniform electric field and acquires a uniform acceleration of 10 3 m / s 2 in the direction of initial velocity. i. ... which electron velocity will be doubled.? ii. How much distance electron would cover in this time.? -Science
Last Answer : Given u=5×103m/su=5×103m/s , a=103m/s2a=103m/s2, v=2u=104v=2u=104 m/s i.Using v=u+atv=u+at 104=5×103+103t104=5×103+103t or t=5 sec ii. Using s=ut+12at2s=ut+12at2 s=5×103×5+12×103×52s=5×103×5+12×103×52 =37.5×103m=37.5×103m
Description : The velocity, time graph of two bodies A and B travelling along the +x direction are given in the fi gure.(a) Are the bodies moving with uniform acceleration ? (b) Which body is moving with greater acceleration ? Give reasons. -Biology
Last Answer : The acceleration is given by the slope of velocity-time graph. Slope of body-A > Slope of body-B as it forms a greater angle with time axis than body B. Thus, body A moves with higher acceleration
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
Description : If the velocity-time graph of a particle is represented by y = mt + c, then the particle is moving with– (1) constant speed (2) constant velocity (3) constant acceleration (4) varying acceleration
Last Answer : (3) constant acceleration Explanation: In this case the given equation shows that that the velocity is linear with time and therefore the particle is moving with constant acceleration because for a ... acceleration the graph of the velocity time graph should be in linear with the time function.
Description : For a body moving with non-uniform velocity and uniform acceleration (1) Displacement – Time graph is linear (2) Displacement – Time graph is non-linear (3) Velocity – Time graph is nonlinear (4) Velocity – Time graph is linear
Last Answer : Displacement – Time graph is non-linear
Description : If the velocity-time graph of a particle is represented by y = mt + c, then the particle is moving with (1) constant speed (2) constant velocity (3) constant acceleration (4) varying acceleration
Last Answer : constant acceleration
Description : Obtain a relation for the distance travelled by an object moving with a uniform acceleration in the interval between 4th and 5th seconds -Physics 9th
Last Answer : Uniform acceleration in the interval between 4th and 5th seconds = = (5u + 1/2 * a * 5^2) - (4u + 1/2 * a * 4^2) = 5u + 1/2 *a * 25 - 4u + 1/2 * a * 16 = u + 1/2 * a * (25-16) = u + 1/2 * a * 9 = u + 9/2 * a If it starts from rest then the displacement will be 9/2a. hope this helps!
Description : Why is there no acceleration of an object moving at equal speed ? Explain ?
Last Answer : The rate of change of velocity is zero because the value of velocity of a moving object does not change. Due to this the acceleration is also zero. That is `a = (vu) / t = (vv) / t`
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.
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.
Description : An object moving in a circle of radius ‘r’ with a constant speed ‘v’ has a constant acceleration towards the center equal to A. v²⁄r B. v⁄r C. v²×r D. v×r
Last Answer : v²⁄r
Description : For an object moving in uniform circular motion, the direction of the instantaneous acceleration vector is: w) tangent to the path of motion x) equal to zero y) directed radially outward z) directed radially inward
Last Answer : ANSWER: Z -- DIRECTED RADIALLY INWARD
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.
Description : A object moves with uniform positive acceleration. Its velocity-time graph will be (a) A straight line parallel to the time axis (b) A straight line inclined at an obtuse angle to the time axis (c) A straight line inclined at an acute angle to the time axis (d) None of these. -Science
Last Answer : Answer is (c)
Description : What is acceleration of a body moving with uniform velocity?
Last Answer : zero because the initial and final velocity is constant . so,difference bet. final velocity and initial velocity is zero
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.
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.
Description : Terminal velocity is (A) A constant velocity with no acceleration (B) A fluctuating velocity (C) Attained after moving one-half of total distance (D) None of these
Last Answer : (A) A constant velocity with no acceleration
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 : constant kinetic energy
Description : Internal state sensors are used for measuring which of below parameterof the end effector. A : Position B : Position & Velocity C : Velocity & acceleration D : Position, Velocity & acceleration
Last Answer : D : Position, Velocity & acceleration
Description : - In end effector internal state sensors are used for measuring (A) Position (B) Position & Velocity (C) Velocity & Acceleration (D) Position, Velocity & Acceleration
Last Answer : D
Description : In simple harmonic motion, the acceleration is: w) constant x) proportional to the distance from the central position y) greatest when the velocity is greatest z) none of the above
Last Answer : ANSWER: X -- PROPORTIONAL TO THE DISTANCE FROM THE CENTRAL POSITION
Description : The initial velocity of an object is vector u = 5i + 10j m/s. Its constant acceleration is vector a = 2i + 3j m/s^2.
Last Answer : The initial velocity of an object is vector u = 5i + 10j m/s. Its constant acceleration is ... Determine the velocity and the displacement after 5 s.
Description : If the motion of an object is described by x = f(t) write formulae for instantaneous velocity and acceleration.
Last Answer : If the motion of an object is described by x = f(t) write formulae for instantaneous velocity and acceleration.
Description : An object whose velocity is changing is said to be in a state of A. acceleration B. rest C. equilibrium D. Brownian motion
Last Answer : acceleration
Description : An object in equilibrium always has zero: w) velocity x) momentum y) mass z) acceleration.
Last Answer : ANSWER: Z -- ACCELERATION
Description : An object is projected vertically upward near the surface of the earth. At the very top of its path, the object's velocity is zero, and its acceleration is: w) 0 x) 9.8 meters per second squared DOWNWARD y) 9.8 meters per second squared UPWARD z) depends on the mass of the object
Last Answer : ANSWER: X -- 9.8 METERS PER SECOND SQUARED DOWNWARD
Description : Mass velocity in case of steady flow and through a constant crosssection conduit is independent of the (A) Temperature (B) Pressure (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) & (B)
Description : The fluid velocity varies as the cube of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop for __________ fluid. (A) Newtonian (B) Pseudo-plastic (C) Dilatent (D) Bingham plastic
Last Answer : (B) Pseudo-plastic
Description : The fluid velocity varies as the square of the cylindrical pipe diameter, in case of steady state laminar flow at constant pressure drop, for __________ fluid. (A) Newtonian (B) Dilatant (C) Pseudo-plastic (D) Non-Newtonian
Last Answer : (A) Newtonian
Description : The fluid velocity varies as the square root of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop of __________ fluid. (A) Dilatent (B) Pseudo-plastic (C) Bingham plastic (D) Newtonian
Last Answer : (A) Dilatent
Description : The amount of combustible escaping unconsumed from the furnace, depends upon the (A) Air supplied and furnace temperature (B) Burner design (thoroughness of mixing versus stratification) (C) Air preheat and the flow of ... , by acceleration or by change of direction) (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : In which case power required would be more a.In lifting up a weight of 100 kg at a velocity of 3 m/sec but accelerating upwards at 0.5 m/sec b.In lowering a weight of 100 kg along an a inclined plane ... speed of 3 m/sec e.In lowering the weight at a velocity of 3 m/sec and acceleration of 1 m/sec2
Last Answer : a. In lifting up a weight of 100 kg at a velocity of 3 m/sec but accelerating upwards at 0.5 m/sec
Description : In case of simple harmonic motion, displacement is proportional to the (A) Velocity (B) Acceleration (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : B) Acceleration
Description : 12. Draw ray diagrams to represent the nature, position and relative size of the image formed by a convex lens for the object placed: -Chemistry-10
Last Answer : Answer. hope this helps you
Description : 14. An object 5 cm is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find the position, nature and size of the image. -Physics-10
Last Answer : Object distance (u) = - 20 cm Object height (h) = 5 cm Radius of curvature (R) = 30 cm Radius of curvature = 2 Focal length R = 2f f = 15 cm According to the mirror formula, ... image height indicates that the image formed is erect. Hence, the image formed is erect, virtual, and smaller in size.