Answer2

5. Sherilynn uses a lever to lift her toy chest to a vertical height of 50cm. She exerts 700N of effort to move her end of the lever 85cm. The force of gravity acting on the tox chest is 1000 N. How much of the energy was wasted as heat?

[[#|Answer]]:

Wo = F x d
= 1000N x 50cm
= 50000J

Wi = F x d
= 700N x 85cm
= 59500J

59500
-50000
9500

9500J are energy wasted as heat.

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