Question

A force of 6n acts on a body of mass 60kg enitially at rest for adistance 3m. The K.M acquired by the body is ​

Answer 1

It depends on how long the force is applied.

F=ma → a = F/m = 2 N / 5 kg = 0.4 m/s2

V= at

E = 1/2 m*V^2 = 0.5*5*(0.4*t)^2 = 0.4*t^2

In 1 second 0.4 Joules is expended. In 10 seconds 40 Joules is expended. In 60 seconds 1.44 kJ is expended.

The associated speeds are 0.4 m/s, 4 m/s, and 24 m/s.