# Revolutions 81118

1. A disc makes 15 revolutions per minute. Determine his angular speed and the boy's speed on the seat that describes a circle with a radius of 5 m.

2. The grinding wheel rotates at 600 revolutions per minute. Determine the period and angular velocity.

Thank you very much. I missed it, and I won't calculate it without an explanation.

2. The grinding wheel rotates at 600 revolutions per minute. Determine the period and angular velocity.

Thank you very much. I missed it, and I won't calculate it without an explanation.

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