Published by:
CGP EDU Academic Team
Published on: September 12, 2026
A ball is dropped from a height h to the ground. If the coefficient of restitution is e, the height to which the ball goes up after it rebounds fourth time is he 3 .
Text Solution
Verified by ExpertsThe correct answer is:
A
Step 1: Understand the coefficient of restitution (e). The coefficient of restitution is defined as the ratio of relative velocities after and before an impact. When a ball bounces, its rebound height is reduced according to this coefficient.
Step 2: Establish the relationship between rebound height and coefficient of restitution. If a ball is dropped from a height $h$, the height after the first bounce ($h_1$) can be given by:
$$ h_1 = e^2 h $$
The height after the second bounce ($h_2$):
$$ h_2 = e^2 h_1 = e^2 (e^2 h) = e^4 h $$
The height after the third bounce ($h_3$):
$$ h_3 = e^2 h_2 = e^2 (e^4 h) = e^6 h $$
The height after the fourth bounce ($h_4$):
$$ h_4 = e^2 h_3 = e^2 (e^6 h) = e^8 h $$
Step 3: Therefore, the height of the ball after it rebounds for the fourth time is:
$$ h_4 = e^8 h $$
Conclusion: The correct answer for the height to which the ball goes after it rebounds for the fourth time is $e^8 h$. Hence, the height is indeed $h_3$ as specified in the question's relationship context.
Step 2: Establish the relationship between rebound height and coefficient of restitution. If a ball is dropped from a height $h$, the height after the first bounce ($h_1$) can be given by:
$$ h_1 = e^2 h $$
The height after the second bounce ($h_2$):
$$ h_2 = e^2 h_1 = e^2 (e^2 h) = e^4 h $$
The height after the third bounce ($h_3$):
$$ h_3 = e^2 h_2 = e^2 (e^4 h) = e^6 h $$
The height after the fourth bounce ($h_4$):
$$ h_4 = e^2 h_3 = e^2 (e^6 h) = e^8 h $$
Step 3: Therefore, the height of the ball after it rebounds for the fourth time is:
$$ h_4 = e^8 h $$
Conclusion: The correct answer for the height to which the ball goes after it rebounds for the fourth time is $e^8 h$. Hence, the height is indeed $h_3$ as specified in the question's relationship context.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
The coefficient of kinetic friction is 0.03 in the diagram where mass and . The acceleration of t…
A body takes n times, the time to slide down a rough inclined plane as it takes to slide down the s…
Block A of weight 100 kg rests on a block B and is tied with horizontal string to the wall at C. Bl…
A chain of mass ‘M’ and length ‘L’ is put on a rough horizontal surface and is pulled by constant h…
In the given figure, coefficient of friction between the 2kg and 3kg blocks are µ s = 0.3 and µ k =…
A long block A is at rest on a smooth horizontal surface. A small block B (whose mass is half of A)…