(Set 2) Motion

Q1. 
If an object is at rest, then the time (X-axis) versus distance (Y-axis) graph
  1. is vertical
  2. is horizontal
  3. has 45 degree positive slope
  4. has 45 degree negative slope

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Correct Answer : B

Q2. 
The slope of a velocity-time graph represents
  1. acceleretion
  2. displacement
  3. distance
  4. speed

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Correct Answer : A

Q3. 
An object is moving with uniform acceleration a. Its initial velocity is u and after time t, its velocity is v. The equation of its motion is v = u + at. The velocity (along Y-axis)- time (along X-axis) graph will be a straight line
  1. passing through origin
  2. with X-intercept u
  3. with Y-intercept u
  4. with slope u

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Correct Answer : C

Q4. 
If an object moves at a non-zero constant acceleration for a certain interval of time, then the distance it covers in that time
  1. depends on its initial velocity
  2. is independent of its initial velocity
  3. increases linearly with time
  4. depends on its initial displacement

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Correct Answer : A

Q5. 
Which of the following equations represents the velocity - time relation?
  1. s = ut + 1/2at^2
  2. 2as = v^2 - u^2
  3. v = u + at
  4. v = u - at

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Correct Answer : C

Q6. 
An iron ball and a wooden ball of the same radius are released from the same height in a vacuum. The time taken by both of the these to reach the ground is
  1. roughly equal
  2. zero
  3. exactly equal
  4. unequal

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Correct Answer : C

Q7. 
During the motion of a projectile fired from the earth surface,
  1. its kinetic energy remains constant
  2. its momentum remains constant
  3. vertical component of its velocity remains constant
  4. horizontal component of its velocity remains constant

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Correct Answer : D

Q8. 
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

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Correct Answer : B

Q9. 
If an object moves in a circular path with uniform ................ its motion is called uniform circular motion
  1. speed
  2. time
  3. velocity
  4. acceleration

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Correct Answer : A

Q10. 
A car undergoes a uniform circular motion. The acceleration of the car is
  1. zero
  2. a non-zero constant
  3. non-zero but not a constant
  4. None of the above

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Correct Answer : B

Q11. 
If an object undergoes a uniform circular motion, then its
  1. acceleration remains uniform
  2. velocity changes
  3. speed changes
  4. velocity remains uniform

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Correct Answer : B

Q12. 
A motor vehicle is moving on a circular with a uniform speed. The net acceleration of the vehicle is
  1. zero
  2. towards the center of the circle
  3. away from the center along the radius of the circle
  4. perpendicular to the radius and along the velocity

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Correct Answer : B

Q13. 
A person standing at the middle point of a wooden ladder which starts slipping between a vertical wall and the floor of a room, while continuing to remain in a vertical plane. The path traced by a person standing at the middle point of the slipping ladder is
  1. a straight line
  2. an elliptical line
  3. a circular path
  4. a parabolic path

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Correct Answer : C

Q14. 
An object moves in a circular path with a constant speed. Which one of the following statement is correct?
  1. The centripetal acceleration of the object is smaller for a gentle curve (i.e. curve of larger radius) than that for a sharp curve (i.e. curve of smaller radius).
  2. The centripetal acceleration is greater for a gentle curve than that for a sharp curve.
  3. The centripetal acceleration is the same for both the gentle and sharp curves.
  4. The centripetal acceleration causes the object to slow down.

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Correct Answer : A

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