Wednesday, 21 September 2022

KINEMATICS: MOTION IN A STRAIGHT LINE SET 3

 

    

Q1 A body is moving with constant speed it acceleration.

  • (a) must be non-zero.
  • (b) must be zero.
  • (c) may be non-zero and constant.
  • (d) may be non-zero and variable.

  • (b) must be zero.

Q2 Velocity of an object is variable. Then

  • (a) its acceleration may remain constant.
  • (b) its speed may remain constant.
  • (c) its average acceleration may remain constant.
  • (d) all of these.

  • (d) all of these.

Q3  Acceleration of a moving body can be found from

  • (a) Slope of the velocity time graph.
  • (b) Slope of distance time graph.
  • (c) Area under distance time graph.
  • (d) the area under velocity time graph.

  • (a) Slope of the velocity time graph.

Q4 The dependence of velocity of a body with time is given by the equation v = 20+0.1`t^{2}`

  • (a) Non uniform acceleration
  • (b) zero acceleration
  • (c) uniform acceleration
  • (d) none of these.

  • (d) none of these.

Q5  The magnitude of velocity increases with time such a kind of motion is called accelerated.

  • a) True
  • b) False 

  • a) True

Q6 Average acceleration of a body during given time interval is given by the slope of its

  • a) Position – time graph
  • b) Velocity – time graph
  • c) Speed – time graph
  • d) Velocity – displacement graph

  • b) Velocity – time graph

Q7  Area under velocity time graph tells us about

  • a) Displacement
  • b) Speed
  • c) Acceleration
  • d) Distance


  • a) Displacement

Q8 SI unit of uniform acceleration is

  • a) m/sec
  • b) `\frac{m}{s^{2}}`
  • c) m.sec
  • d) m`s^{2}`

  • b) `\frac{m}{s^{2}}`

Q9.  Velocity of an object in a Retardation motion

  • a) Increases
  • b) Remains same
  • c) Decreases
  • d) First increases then decreases

  • c) Decreases

Q10 Example of uniformly accelerated motion

  • a) Freely falling body
  • b) Ball dropped from top of a ladder
  • c) A bicycle whose brakes have been engaged
  • d) All of above

  • d) All of above

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