Question

A mother (mass 60.0 kg) skates across an ice rink with negligible friction toward her child (mass 20.0 kg), who is standing still on the ice. If the mother moves at 4.0 m/s before she picks up her child, what is her new speed after she picks up her child and holds onto him

Answer 1

We have that the new speed after she picks up her child is mathematically given as

V2=3m/s

Speed

The speed of a body is simply the rate at which the body moves or functions, the speed of a body is measured with an SI unit of m/s.

Generally the equation for the  Velocity is mathematically given as

m1v1=m2v2

Therefore

$v2=\frac{60*4}{60+20}$

V2=3m/s

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