A simple pendulum has a mass of 0.25 kg and a length of 1.0 m.It is displaced th

Question

A simple pendulum has a mass of 0.25 kg and a length of 1.0 m.It is displaced through an angle of 30° and then released.After a time, the maximum angle of swing is only 10°. How muchenergy has been lost to friction?

Answer Choices

a.

0.29 J

b.

0.65 J

c.

0.80 J

d.

1.0 J

A simple pendulum has a mass of 0.25 kg and a length of 1.0 m.It is displaced through an angle of 30° and then released.After a time, the maximum angle of swing is only 10°. How muchenergy has been lost to friction?

Answer Choices

a.

0.29 J

b.

0.65 J

c.

0.80 J

d.

1.0 J

i put c and i was wrong help

Explanation / Answer

InitialPE=mgh=0.25*g*l(1-cos)=0.25*9.8*1(1-cos30)=0.328238J Final PE=0.25*9.8*1(1-cos10)=0.03722J PE=PEinitial-PEfinal=0.328238-0.3722=0.291016J

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