# Why does an object with more mass have a greater change in momentum that an object with less mass?

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Slide 4 of the 703 lecture:

Identical forces push blocks A and B across a frictional surface. Block A has 4 times the mass of Block B. They travel the same distance. Which block has a greater change in momentum?

You picked the correct concept. $\Delta P=F\Delta t$. Here we know that F is identical. Then you need to decide how does $\Delta t$ compare in both cases.