Question

(a) One particle has mass m and a second particle has mass 2m. The second particle...

(a) One particle has mass m and a second particle has mass 2m. The second particle is moving with
speed v and the first with speed 2v. How do their kinetic energies compare?
(b) A person drops a pebble of mass m1 from a height h, and it hits the floor with kinetic energy K.
The person drops another pebble of mass m2 from a height of 2h, and it hits the floor with the same
kinetic energy K. How do the masses of the pebbles compare?

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