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## Homework Statement

Consider a 3 kg object moving in a 2.5 m radius circle at 5.7 m/s to answer the next 2 questions.

4. How much force is required to keep the object moving in the circle?

1.3 N

3.3 N

39 N

6.8 N

5. What is the acceleration of the object?

13 m/s2

39 m/s2

6.8 m/s2

2.3 m/s2

## Homework Equations

For the first one:

F=m*a

a=(v^2)/r = (5.7^2)/2.5 = 12.9996

thus, F=3*12.9996 = 38.988N

## The Attempt at a Solution

I think I got the first one. Is that one the right answer? I can't figure out the second one though. Thanks for your help!