Question 1
A race car travels 40 m/s around a banked (45° with the horizontal) circular (radius = 0.20 km) track. What is the magnitude of the resultant force on the 80-kg driver of this car?
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0.68 kN
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0.64 kN
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0.72 kN
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0.76 kN
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0.52 kN
Question 2
A rock attached to a string swings in a vertical circle. Which free body diagram could correctly describe the force(s) on the rock when it is at the highest point?
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