JEE Mains Model Paper 9

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

2

2

= 1 m/s
Final velocity = −

2

2

= -1 m/s

→

Pi

= 0.4 N-s
P

→

ji

= -0.4 N-s

→

J

=

→

Pf

−

→

Pi

= -0.4 - 0.4
= 0.8 N-s (

→

J

= impulse)
|

→

J

| = 0.8 N-s