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

Question

G1 Physics · Accepted Answer

(1/2)mv² = 10000. With m = 2 kg, v² = 10000, so v = 100 m s⁻¹. Since the body starts from rest, v = at gives a = 100/5 = 20 m s⁻². Hence F = ma = 2×20 = 40 N.