Question

a body with the linear momentum 2kg m/s is stored in 10 sec the average force required is​

Answer 1

Answer:

Change in momentum, Δp=F.t=0.2×10=2

Initial value of velocity =

5

10

=2m/sec

Initial energy =

2

1

×5×2×2=10J

Total final momentum =10+2=12kgm/sec

Final velocity =

5

12

m/sec

Final energy =

2

1

×5×

5

12

× 12= 572

=14.4J

Change in energy =14.4−10=4.4joule