Question

5.

Answer 1

Answer:

$U_{2}=4U_{1}$

Explanation:

Let U1 and U2 be the gravitational potential energy of the first and second stone  respectively.

U1 is given by:

$U_1 = (m)gh$

and U2 is given by:

$U_2 = (4m)gh$  

therefore, comparing the energies we have:

$\frac{U_2}{U_1} = \frac{(4m)gh}{(m)gh}= 4$

therefore:

$U_2=4U_1$