Chapter : Motion
Acceleration - 1
1.
Acceleration is defined as :
(A) Rate of change of distance with respect to time
(B) Rate of change of displacement with respect to time
(C) Rate of change of velocity with respect to time
(D) Rate of change of speed with respect to time
2.
Choose the correct statement :
(A) Acceleration is a scalar quantity and its S.I. unit is m/s2
(B) Acceleration is a vector quantity and its S.I. unit is m/s2
(C) Acceleration is a scalar quantity and its S.I. unit is m2/s
(D) Acceleration is a vector quantity and its S.I. unit is m2/s
3.
Which of the following four statements is false?
(A) A body can have zero velocity and still be accelerated
(B) A body can have a constant velocity and still have a varying speed
(C) A body can have a constant speed and still have a varying velocity
(D) The direction of the velocity of a body can change when its acceleration is constant.
4.
Which of
(A) If the
(B) If the
(C) If the
(D) If the
5.
The correct statement from the following is :
(A) A body having zero velocity will not necessarily have zero acceleration
(B) A body having zero velocity will necessarily have zero acceleration
(C) A body having uniform speed will necessarily have zero acceleration
(D) A body having uniform speed will necessarily have non- zero acceleration
6.
7.
8.
9.
10.
1. (C)
the following statements is incorrect?
velocity of a body changes, it must have some acceleration
speed of a body changes, it must have some acceleration
body has acceleration, its speed must change
body has acceleration, its velocity must change
When a body undergoes retarded motion then :
(A) its speed must increase
(C) its speed can increase or decrease
A particle is moving with constant speed then :
(A) its acceleration must be zero
(D) its acceleration may or may not be zero
A particle is moving with constant velocity then :
(A) its acceleration must be zero
(D) its acceleration may or may not be zero
When a body is accelerating then :
(A) its speed must increase or decrease
(C) its speed must be non zero
(B) its speed must decrease
(D) its direction of motion must change
(C) its acceleration must be non- zero
(D) its acceleration must be non- zero and positive
(C) its acceleration must be non- zero
(D) its acceleration must be non- zero and positive
(B) its direction of motion must change
(D) its speed may remain constant
The correct statement from the following is :
(A) When acceleration of a body is positive then its speed must increase
(B) When acceleration of a body is negative then its speed must decrease
(C) When acceleration of a body is positive then its speed must increase or decrease
(D) When acceleration of a body is negative then its speed may increase
2. (B)
3. (B)
4. (C)
ANSWER KEY
Physics (Acceleration - 1)
5. (A)
6. (B)
7. (D)
8. (A)
9. (D)
10. (D)
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