how much does the momentum of the body mass 5kg change when its speed increases from 30-40m/s.
shana81:
but change in momentum is not asked I thing
only momentum has been asked
but the answer was wrong
Answers
Answered by
16
Momentum, p= mv
You can either find momentum in each case and then subtract final from initial to get the change in momentum.
Or,
Change in momentum = m(v1 - v2)
= 5 x (40 - 30) = 50 kgm/s
Hope this helps you.
You can either find momentum in each case and then subtract final from initial to get the change in momentum.
Or,
Change in momentum = m(v1 - v2)
= 5 x (40 - 30) = 50 kgm/s
Hope this helps you.
Answered by
11
Momentum = Mass × velocity
For an object of mass m the change in momentum when it’s velocity changes from u to v is
Δp = mv - mu
Δp = m(v - u)
Δp = 5 kg × (40 m/s - 30 m/s)
= 5 kg × 10 m/s
= 50 kg m/s
∴ Momentum of body is increased by 50 kg m/s
For an object of mass m the change in momentum when it’s velocity changes from u to v is
Δp = mv - mu
Δp = m(v - u)
Δp = 5 kg × (40 m/s - 30 m/s)
= 5 kg × 10 m/s
= 50 kg m/s
∴ Momentum of body is increased by 50 kg m/s
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