CBSE Class 11-science Answered
motion under gravity
Asked by yasho1710 | 04 Sep, 2010, 08:26: AM
Expert Answer
The question talks about two bodies of same mass being dropped through the same height. To find the final velocity of the second body, we will find the value of acceleration from the first case.
Body 1. Initial velocity, u = 0
Final velocity, v = 3 km/h
Height, h
Using v2 = u2 + 2ah
32 = 0 + 2ah
a = 9/(2h)
Body 2. Initial velocity, u = 4 km/h
Final velocity, v = ?
Height, h
Using v2 = u2 + 2ah
v2 = 42 + 2ah
v2 = 16 + 2(9/2h)h
= 25
v = 5 km/h
Answered by | 05 Sep, 2010, 12:02: AM
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