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21.
Only force acting on a bouncing ball is
- A.gravity
- B.weight of ball
- C.friction
- D.a and b both
- Answer
- Report
Answer : [D]
22.
Accelerometer detects the
- A.small acceleration
- B.large acceleration
- C.small deceleration
- D.large acceleration and deceleration
- Answer
- Report
Answer : [D]
23.
If the gradient of a graph is negative, then the acceleration is
- A.positive
- B.negative
- C.zero
- D.1
- Answer
- Report
Answer : [B]
24.
If a student drops a stone from a cliff of height 30 m and the time it
takes to reach the ground is 2.6 s, then the acceleration due to gravity is
- A.9ms-2
- B.10ms-2
- C.4ms-2
- D.8.8ms-2
- Answer
- Report
Answer : [D]
25.
Gradient of line of velocity-time graph is tells us the
- A.velocity
- B.acceleration
- C.distance
- D.time
- Answer
- Report
Answer : [B]
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