A 51 g steel ball is released from rest and falls vertically onto a steel plate. The ball strikes the plate and is in contact with it for 0.5 ms. The ball rebounds elastically, and returns to its original height.
The time interval for a round trip is 3.00 s. In this situation, the average force exerted on the ball during contact with the plate is closest to: A) 3,000 N
B) 1,500 N
C) 2,490 N
D) 2,000 N
E) 3,500 N
Question 2
A 600-kg car is going around a banked curve with a radius of 110 m at a speed of 24.5 m/s. What is the appropriate banking angle so that the car stays on its path without the assistance of friction?
A) 60.9 B) 29.1 C) 33.8 D) 56.2 E) 13.5
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