((QUESTION 1)) A ball with a radius of 17cm rolls on a level surface, and the tr

Question

((QUESTION 1))

A ball with a radius of 17cm rolls on a level surface, and the translational speed of the center of mass is 0.29m/s .

Part A

What is the angular speed about the center of mass if the ball rolls without slipping?

Express your answer using two significant figures.

((QUESTION 2))

The drain plug on a car's engine has been tightened to a torque of 20m?N .

Part A

If a 0.19m long wrench is used to change the oil, what is the minimum force needed to loosen the plug?

Express your answer using two significant figures.

Explanation / Answer

1) w = v/r = 0.29/0.17 = 1.705

2) T = F X R = FRsin(x) = F x R x 1 => F = T/R = 20/0.19 = 105.26

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