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3 years ago

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Problem 7:deletededc326999bef85931fda5d1ab0d68e21218f27b46f4f11ab80872358251b584ddeleted 0N86-C1-52-40-A837-22820 If object

A is twice the mass of object B what can be said about their kinetic energies just as they hit the ground

1 answer:

laila [671]3 years ago

3 0

Answer:

the kinetic energy of body B is twice the kinetic energy of body A

Explanation:

The kinetic energy of a body is given by

K = ½ m v²

If two objects leave the same point, suppose that at the same height when they reach the ground they have the same velocity.

Therefore if the mass of body b is twice the mass of body A

$m_{b} = 2 m_{a}$

$K_{b}$ = ½ (2 $m_{a}$ ) v²

K_{b} = 2 (½ m_{a} v²)

K_{b} = 2 K_{a}

therefore the kinetic energy of body B is twice the kinetic energy of body A

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