Average Speed and Instantaneous Velocity NEET Questions

Physics - Kinematics

Average Speed and Instantaneous Velocity MCQ Questions


1.
An object moves 30 m in 6 s, then returns 10 m in 4 s. What is the average speed over the total journey?
A.
4 m/s
B.
2 m/s
C.
3 m/s
D.
5 m/s
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ANSWER :
A. 4 m/s
2.
A particle's position is given by x = 8.5 + 2.5t² (metres, t in seconds). Its instantaneous velocity at t = 2 s is:
A.
5 m/s
B.
10 m/s
C.
15 m/s
D.
20 m/s
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ANSWER :
B. 10 m/s
3.

A car starts from rest and accelerates uniformly for 10 seconds to a velocity of 20 m/s. It then moves with uniform velocity for 20 seconds and finally comes to rest in 5 seconds under uniform retardation. The total distance covered by the car is:

NEET - 2021

A.

300 m

B.

550 m

C.

700 m

D.

800 m

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ANSWER :

B. 550 m

4.
For the position function x = 0.08t³ (metres, t in seconds), what is the instantaneous velocity at t = 4 s?
A.
3.84 m/s
B.
4.00 m/s
C.
2.40 m/s
D.
5.12 m/s
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ANSWER :
A. 3.84 m/s
5.
The instantaneous speed of an object at any instant is:
A.
Always greater than |instantaneous velocity|
B.
Always equal to the magnitude of instantaneous velocity
C.
Always less than |instantaneous velocity|
D.
May be greater or equal to |instantaneous velocity|
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ANSWER :
B. Always equal to the magnitude of instantaneous velocity
6.
A car's position is x = 2t² m. The average velocity between t = 2 s and t = 4 s is:
A.
8 m/s
B.
12 m/s
C.
16 m/s
D.
4 m/s
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ANSWER :
B. 12 m/s