A spherical body of mass 2 kg starting from rest acquires a kinetic energy of 10000 J at the end of 5 th second. The force acted on the body is _____ N .

Step-by-step solution

Given kinetic energy, 1 2 m v 2 = 10000   J ⇒ 1 2 × 2 × v 2 = 10000 ⇒     v 2 = 10000 ⇒     v = 100   m   s - 1 Also, ⇒   v = at = a × 5 = 100 ⇒     a = 20   m   s - 2 Therefore, force acting F = m a = 2 × 20 = 40   N