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JEE Main Physics Class 11 Motion in a Straight Line and Plane Part 3 Questions
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Question : 32
Total: 45
A body starts falling freely from height
H
hits an inclined plane in its path at height
h
. As a result of this perfectly elastic impact, the direction of the velocity of the body becomes horizontal. The value of
H
h
for which the body will take the maximum time to reach the ground is_____
[31-Jan-2024 Shift 1]
Your Answer:
Validate
Solution:
👈: Video Solution
Total time of flight
=
T
T
=
√
2
h
g
+
√
2
(
H
−
h
)
g
For max. time
=
dT
dh
=
0
√
2
g
(
−
1
2
√
H
−
h
+
1
2
√
h
)
=
0
√
H
−
h
=
√
h
h
=
H
2
⇒
H
h
=
2
© examsnet.com
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