Qstnid -10- An Object Of Mass 40 Kg Is Raised To A Height Of 5 M Above The Ground. What Is Its Potential Energy? If The Object Is Allowed To Fall, Find Its Kinetic Energy When It Is Half Way Down. - 15: 2-work And Energy - Cbse-ix-science

Home Learn Fast select Course

Show Unit/Chapter Change Unit Change Subject Last Menu

CBSE-IX-Science

15: 2-Work and Energy

digibest Free NCERT Solutions with no signup needed

Qstn# 10 Prvs-Qstn Next-Qstn

#10
An object of mass 40 kg is raised to a height of 5 m above the ground. What is its potential energy? If the object is allowed to fall, find its kinetic energy when it is half way down.
Ans : Potential energy = 2000 J

When the object is half way down the height of the object is = 2.5 m

initial velocity (u) = 0 (thrown from ground/rest)

since

= 50

Kinetic energy

= 1000 J