Ask a Teacher

Search



A moving body weighing 400N possess a 500J of kinetic energy. Calculate the velocity with which the body is moving.(g=10m s-2)
We know that the force will accelerate on object
.
                        We have F=ma   ------------ (1)

Where m is the mass of the object
            F is the force acting on the object in Newtons
            a is the acceleration or change in velocity.

Kinetic Energy = 500J
KE = (1/2)mv2    -----------------(2)
From Equation 1 we can write
            m=F/a
               =400/10 = 40kg
From equation 2 we can write
    v2 = KE x 2/m
        =500 x 2/40
        =25

Therefore v = sqrt of 25

ie     v= 5m/s


comments powered by Disqus