A 1.0 kg pendulum has an initial total energy of 10 J. Calculate the energy lost as heat if the pendulum is 0.10 m high and is traveling at 4.0 m/s.

Lost energy = 2J

Explanation: Given that the

Mass of the pendulum M = 1.0kg

Initial energy E = 10J

Height h = 0.1 m

Speed V = 4 m/s

Let us use conservation of energy to analyze the senero

The maximum P. E at the initial position will be equal to maximum P. E for travelling down the hill

I. e

Total P. E = total K. E

K. E = 1/2MV^2

K. E = 1/2 * 1 * 4^2

K. E = 8J

Since P. E = K. E

P. E = 8J

But initially energy E = 10J

Lost energy = P. E - E

Lost energy = 10 - 8 = 2J