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Explain why a bullet with a mass of 15 grams and a velocity of 400 m/s has more momentum than you at rest. Calculate the momentum for both.

• science -

momentum = mass x velocity.
For you, velocity = 0; therefore, momentum is zero.

For the bullet, it has mass AND velocity; therefore, it has momentum.

• science -

Explain how the energy (total, kinetic or potential) will change when you let an object to free-fall from the top of a building

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