Question

a mass of 10kg is dropped from a height of 50cm.find its kinetic energy and velocity

Answer 1

Here the initial velocity is 0 because the mass is in dropping state..

Now, v^2-u^2=2gh

v^2=2*10*50*100

v=√2*5*5*2*10*100

v=100√10

=100*3.16

=316m/s

And now the kinetic energy

=1/2mv^2

=1/2*10*316

=1580J