Question

) If it actually starts 6.5 m higher than your answer to the previous part (yet still reaches the top of the loop with the same velocity), how much energy, in joules, did it lose to friction? Its mass is 1700 kg.

Answer 1

Answer:

$\Delta E=158270\ J$

Explanation:

It can be assumed that the finally it reaches to a height of 16 m. He starts from 6.5 m

Mass, m = 1700 Kg

Let $\Delta E$ is the change in potential energy. It is given by:

$\Delta E=mg(h_f-h_i)$

$\Delta E=1700\times 9.8\times (16-6.5)$

$\Delta E=158270\ J$

So, it will lose 158270 joules of energy in friction. Hence, this is the required solution.