A wooden block of mass is sliding on a smooth horizontal surface
PHYSICS · Multi-part · CBSE · Physics · Laws of Motion · Laws of Motion
Problem
A wooden block of mass 5kg is sliding on a smooth horizontal surface. Initially its speed is 2ms−1. A constant horizontal force acts on it for 3s and increases its speed to 8ms−1.
(i) Calculate the initial and final momentum of the block.
(ii) Determine the change in momentum of the block during the 3s interval.
(iii) Does the inertia of the block change in this process? Give a reason for your answer.
(iv) Find the magnitude of the acceleration produced and hence calculate the magnitude of the force acting on the block.