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September 19, 2014

September 19, 2014

Posted by **Cathy** on Friday, February 23, 2007 at 2:07am.

my teacher hadn't taught anything about heat..but he did give us this question, thus, i got no idea with this question. please help. thanks a lot.

The heat generated equals the amount of (kinetic + potential) energy lost. That is because of the law of conservation of energy.

In this case, M g H = 17x9.8x3.5 = 583.1 J of potential energy is lost while the kinetic energy increases by (1/2)x(17)x(2.5)^2 = 53.1 J. The rest of the potential energy loss, 530 J, is converted to heat

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