question archive 1 A mother has four times the mass of her young son

1 A mother has four times the mass of her young son

Subject:PhysicsPrice:2.85 Bought3

1 A mother has four times the mass of her young son. Both are running with the same kinetic energy.

What is the ratio vs/vm other of their speeds?

2.How far must you stretch a spring with k = 1000N/m to store 240J of energy?

 

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