Algebra 2 HW Help

Question

A coin has a radius of 10 mm. How long will it take the coin to roll through the given angle measure at the given angular velocity? How far will it travel in that time? Round to the nearest tenth.

180°; 5 rev/sec

 

The coin will take ___ sec to roll 180° and travels approximately mm. 

Answer 1

Need speed to get time.

To roll 180° the coin goes 1/2circumference.

Since the rad=10mm; the circumference is dpi=20p=62.8/2=31.4mm.