A 45kg mass is placed on the end of a first-class lever. At the other end, a force of 110 N is applied to balance the lever. What is the mechanics advantage of the lever? A. 24
B. 2.4
C. 0.41
D. 0.25
E. 4.0

Aferris wheel is a vertical, circular amusement ride with radius 9 m. riders sit on seats that swivel to remain horizontal. the ferris wheel rotates at a constant rate, going around once in 9 s. consider a rider whose mass is 56 kg. at the bottom of the ride, what is the perpendicular component of the rate of change of the rider's momentum? at the bottom of the ride, what is the vector force exerted by the seat on the rider?

Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. each of your steps is 0.7 m long. what is your speed? 150 steps/min=/s=/h

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?