Question

A car acceleartes 36km/h to 90km/h in 3sec if the mass of car is 1000kg then find change in momentum

Answer 1

Given that,

Mass m=1000kg

Speed v

1

=36km/h=10m/s

Speed v

2

=108km/h=30m/s

We know that,

The change in momentum

ΔP=m(Δv)

ΔP=m×(v

2

−v

1

)

ΔP=1000×(30−10)

ΔP=2×10

4

kgm/s

Hence, the change in momentum is 2×10

4

kgm/s

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Answer 2

Put formula  change in momentum =m(v-u)/t