Question

If linear momentum (P) of a moving object varies

with time(t) is given as 3 2 Ptt = ++ (2 3 2) kg m/s

(where t is in second), then force acting on the

object at t = 1 s will be

(1) 6 N (2) 12 N

(3) 9 N (4) 18 N​

Answer 1

Answer:

F

x

=

dt

dP

x

=4t⟹F

x

=4(2)=8

F

y

=

dt

dP

y

=3t⟹F

y

=3(2)=6

F=

F

x

2

+F

y

2

=

8

2

+6

2

=

64+36

=

100

=10