# physics

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A 70 k/g woman and her 35 k/g son are standing at rest on an ice rink. They push against each other for .60 s, causing them to glide apart. The speed of the woman immediately after they separate is .55 m/s
question asks what is the magnitude of the total momentum of the 2 people after they push?

• physics -

zero
No computation is necessary
There are no external forces on the two person system.
Therefore the total momentum does not change, First Law.

• physics -

A 70 k/g woman and her 35 k/g son are standing at rest on an ice rink. They push against each other for .60 s, causing them to glide apart. The speed of the woman immediately after they separate is .55 m/s
question asks what is the womans momentum after the push

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