How high must a body be lifted to gain an amount of potential energy equal to the kinetic energy it has,when moving at speed of 20 metre per second.( take value of acceleration due to gravity at that place is equals to 10 metre per second square) *
(a) 200m
(b) 20m
(c) 2m
(d) 2000m
Answers
Answered by
3
The correct option is : (b) 20m
(1/2) mv^2 = mgh
=> h = (v^2 / 2g)
=> h = 20^2 / 2x10
=> h = 400/20
=> h = 20m
and answer for your previous question is
works done = F.s
=> 6 = ( 3i + Cj + 6k).(-4i + 2j + 3k)
=> 6 = (-12 + 2C + 18)
=> C = 0
Hope this helps you ✌️✌️☘️☘️.
Answered by
4
Answer:
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