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Last Updated On 23-10-2022 - By Sara

A ball is dropped from a height of 45 m from the ground. The coefficient of restitution between the ball and the ground is 2/3. What is the distance travelled by the ball in 4th second of its motion. Assume negligible time is spent in rebounding. Let

a)

5 m

b)

20 m

c)

15 m

d)

10 m


Question ID - 100238 :-

A ball is dropped from a height of 45 m from the ground. The coefficient of restitution between the ball and the ground is 2/3. What is the distance travelled by the ball in 4th second of its motion. Assume negligible time is spent in rebounding. Let

a)

5 m

b)

20 m

c)

15 m

d)

10 m

1 Answer
5876 Votes
3537

Answer Key : (c) -

(c)

Time taken to fall through 45 m =

m/s

Distance travelled in the fourth second=distance travelled in 1 s after rebounding



Next Question :

A particle of mass  is moving horizontally with a constant velocity  towards a rigid wall that is moving in opposite direction with a constant speed  . Assuming elastic impact between the particle and wall, the work done by the wall in reflecting the particle is equal to

a)

(1/2)

b)

(1/2)

c)

(1/2)

d)

None of these


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