2 questions, that I just can't get and anyone's help would be greatly appreciated....(adsbygoogle = window.adsbygoogle || []).push({});

A belt runs on a wheel of radius 44cm. During the time the wheel takes to coast uniformly to rest from an initial speed of 1.8 rev/s, 29.5m of belt length passes over the wheel. Find:

(a) the deceleration of the wheel

(b) the number of revolutions it turns while stopping

A 6.2g arrow moving at 23.2 m/s strikes a watermelon and drills a 75cm hole straight through it. It takes the arrow 0.0375s to emerge from the watermelon. What is the average force that opposes the arrow's motion?

Thanks again for any help you can provide.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Force/Circular Angular Motion

**Physics Forums | Science Articles, Homework Help, Discussion**