Question

(a) State Newtons second law of motion. How this law can be used to measure force

acting on an object?

Answer 1

(a) According to Newton' second law of motion, the rate of change of linear momentum of a body is directly proportional to the external force applied on the body, and this change takes place always in the direction of applied force.
(b) The rate of change of linear momentum of a body is directly proportional to the external force applied on the body, and this change takes place always in the direction of the force applied.
F = dp/dt = d(mv) / dt = m (dv/dt) = ma