a body is dropped from rest from height h gravity the velocity v just before Collision with earth will be given by
a)v=u+gt
b)v=½gt²
c)v²=2gh
d)v²=u²+2gh
Answers
Answered by
1
Given : a body is dropped from rest from height h gravity
the velocity v just before Collision with earth
To Find : Velocity V
a)v=u+gt
b)v=½gt²
c)v²=2gh
d)v²=u²+2gh
Solution:
PE at height h = mgh
KE at height h = 0 as at rest
TE = PE + KE = mgh
PE at earth = 0 as h = 0
KE = (1/2)mv²
TE = (1/2)mv²
Equate Total Energy
(1/2)mv² = mgh
=> v² = 2gh
Hence v²=2gh is the correct answer
Learn More
A particle is dropped from a height of 80m . Find the distance ...
brainly.in/question/11370407
A ball is dropped from a height of 80ft the ball is such that it ...
brainly.in/question/11471174
Similar questions