Physics
A body of mass 10 kg is moving with a velocity 20 m s-1.
If the mass of the body is doubled and its velocity is halved,
find:
(i) the initial kinetic energy, and
(ii) the final kinetic energy.
Related Questions
A ball of mass 0.5 kg slows down from a speed of 10ms-1 to that of 6ms-1. Calculate the change in kinetic energy of the ball.
A canon ball of mass 500g is fired with a speed of 15m/s-1.
Find:
(i) its kinetic energy and
(ii) its momentum.
A truck weighing 1000 kg changes its speed from 36 km/h to 72 km/h in 2 minutes.
Calculate:
(i) the work done by the engine and
(ii) its power.
(g =10 m/ s-2)
A body of mass 60 kg has the momentum of 3000 kgms-1.
Calculate:
(i) the kinetic energy and
(ii) the speed of the body.