# physics

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a toy moves on a horizontal surface with a speed of 3m/s.it makes 8 turns in 5 seconds,whats the diameter of the wheel?

• physics -

C = πd m
8 turns is thus 8πd m
since it takes 5 seconds, the speed is

8πd m/5 s = 3 m/s
8πd=15
d = 15/8π

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