Question

d) 584 N a) 40 mph An object of mass 6.14-10kg s atrest, its momentum is a) 5.4 N b) 5 84-10 c) Zero body "B' of reason Level - II Body 'A' of mass 50 kg moving with a velocity 20 m sec and another body 'B' of mass moving with a velocity 15 m/sec Which body has greater momentum ав Cm b) A Both A and Bare in same momentum d) Data in sufficient B moving with velocities y, and then the ratios of their mome​

Answer 1

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The velocity of a body of mass 10 kg increases from 4 m/s to 8 m/s when a force acts on it for 2 s.

a) what is the momentum before the force acts?

b) What is the momentum after the force acts?

c) what is the gain momentum per second?

d) What is the value of the force?

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Solution

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Mass of the body =10 kg

Initial velocity u=4 m/s

Final velocity v=8 m/s

Time t=2s

a) Momentum before force acts p

1

=m×u=10×4=40kg.m/s

b) Momentum after force acts p

2

=m×v=10×8=80kg.m/s

c) Gain in momentum per second =

2

40

=20kg.m/s

d) Acceleration a=

t

v−u

=

2

8−4

=2m/s

2

Force =m×a=10×2=20 N

please brainlest mark