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How much force would be needed to cause a 17 kg ⋅ m/s change in the momentum of an object, if the force acted for 5 seconds?

1 Answer

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Take into account that the force can be written as follow:


F=(\Delta p)/(\Delta t)

where,

Δp: change in momentum = 17 kg.m/s

Δt: time interval at which the force change the momentum = 5 s

Replace the previous values of the parameters into the formula for F, and simplify:


F=\frac{17\operatorname{kg}(m)/(s)}{5s}=3.4\operatorname{kg}(m)/(s^2)=3.4N

Then, a force of 3.4N would be needed to change the momentum of an object 17 kgm/s in 5s.

User Brandon Rhodes
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