Question

a) An object of mass 15 kg is moving with uniform velocity of 4m/sec. What is the kinetic energy possessed by the object?

Answer 1

Given,
Mass = m = 15 kg
Velocity = v = 4 m/s

The kinetic energy is given by,
$KE=\frac{1}{2}m{v}^2$

$KE=\frac{1}{2}\times 15\times 4\times 4=120J$.
Thus, the kinetic energy of the object is 120 J.