Question

A light body and a heavy body have the

Answer 1

Answer:

The heavy body

Explanation:

The heavy body because it's heavier and the heavier something is the more kinetic energy it has.

Pretty sure this is correct

Hope it helps

Answer 2

Answer:

Momentum is P=mv

Explanation:

Let momentum of a be Pa and momentum of b be Pb. Since they are equal we let

Pa=Pb

And we can see that since a is less massive, its velocity is larger than b's.

That is va > vb.

Kinetic energy is E=(1/2)mv^2

Note that using the formula for momentum we can also say kinetic energy is E=(P/2)v

So kinetic energy of a is

Ea=(Pa/2)va

And kinetic energy of b is

Eb=(Pb/2)vb

But we know Pa=Pb so we can substitute this into one of the kinetic energy relations to get

Eb=(Pa/2)vb.

Now putting the two side by side (NOT setting them equal, just comparing them) we get

Ea=(Pa/2)va Eb=(Pa/2)vb

The first part of each equation is the same: Pa/2. The only difference between them is Ea is multiplied va and Eb is multiplied by vb. And because we know va > vb we can conclude that the kinetic energy of a is larger.

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