Question

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

Answer 1

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

Step-by-step 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