Speed of any freely falling object is always same. Provided, both are left to fall from the same height. If you perform this experiment in a perfect vacuum or near vacuum laboratory, both of them will reach ground with same velocity this is because there is no resistance to their motion. This is always true no matter where you go and perform this experiment.
It can be easily proved from conservation of mechanical energy. Why conserving energy? because there are no forces acting on the freely falling objects other than conservative force(mg).
Hi there!
This is an example of a recoil collision.
Using the conservation of momentum:

The initial momentum is 0 kgm/s (objects start from rest), so:

We are given that the 15 kg block has a velocity of 12 m/s to the left, so:

Solve for v2':

Answer:
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The transfer of energy is potential energy to kinetic energy. The swing has potential energy when she pulls it back and once she lets go, allowing the swing to move, it then has kinetic energy.
Answer:
B
Explanation:
A body has kinetic energy that is moving