H2P-14
Centripetal force
H2 Physics · JC 1 · Hard · Centripetal force
A 12 g coin is placed 15 cm from the axis of a rotating platform. It just begins to slip when the platform rotates at 45 revolutions per minute. What is the maximum frictional force on the coin?
- 4.0 × 10⁻² N
- 1.8 × 10⁻² N
- 6.7 × 10⁻² N
- 2.2 × 10⁻¹ N
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