Question

A moving body of maas 10kg and have 20 J of kinetic ebergy find its speed

Answer 1

Mass =10kg

K.E= 20J

So speed =?

We know that kinetic energy is 1/2mv^2

So when we put th3 values in equation, we get

20=1/2*10*v^2

20*10/2=v^2

200/2=v^2

100=v^2

v=10

So speed is 10 meter per second