Question

The figure shows the position – time (x – t) graph of one-dimensional motion of a body of mass 0.4 kg. The magnitude of each impulse is

(1) 0.4 Ns 

(2) 0.8 Ns

(3) 1.6 Ns 

(4) 0.2 Ns

Answer 1

2 

From the graph, it is a straight line so, uniform motion. Because of impulse direction of velocity changes as can be seen from the slope of the graph.

Directions : Questions number 40 – 41 are based on the following paragraph.

A nucleus of mass M + Dm is at rest and decays into two daughter nuclei of equal mass M/2 each. Speed of light is c.