A few days ago
jason j

Need help on this circular motion problem?

A 400 gram rock is tied to a string 1.2 meters long and twirled in a circle that takes the rock 14.6 seconds to complete 20 revolutions.

a) calculate the period of this motion.

b) find its centripetal acceleration

c) find the tension in the string

Top 1 Answers
A few days ago

Favorite Answer

This is homework *help*; you’ve merely posted your assignment. Show what you’ve done so far, explain where you’re stuck, and we can help you over the rough spot. Simply handing you the answers would be cheating.

Basically, you need to find the basic motion equations in your textbook and plug in the numbers. The first one is simple division (20 cycles, 14.6 seconds); you should have been able to get that one without posting here.