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Question 19.20: To start a pendulum swinging, you pull it slightly to one si...

To start a pendulum swinging, you pull it slightly to one side.

a What kind of energy does this transfer to the mass?

b Describe the energy changes that occur when the mass is released.

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a Gravitational potential energy
b Gravitational potential energy is transferred to kinetic energy, which reaches a maximum when the bob passes through the lowest point; then k.e. is converted to g.p.e. once more.

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