1)By how much does the momentum of a body of mass 5kg change when its speed.a)Decreases from 20m/s to 0.20m/a.b)increasing from 30m/s to 40m/s.
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Answer:
Hey Mate !
(a).Here.
Mass of the body ,m=5 kg
initial velocity,u=20 m/s
final velocity,v=0.20 m/s
change in momentum=m(v-u)
= 5(0.20-20) kg m/s
= -99 kg m/s
The negative sign shows that the momentum decrease (↓)
(b).Here,
mass,m=5 kg
initial velocity,u=30 m/s
final velocity,v=40 m/s
change in momentum=m(v-u)
=5(40-30)
=50 kg m/s
Here .the momentum of body decrease(↓) when the speed increase (↑)
Explanation:
Hope it helps u
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