1. You are traveling at 30 mph (13.4 m/s) and you hit a concrete wall. Your airbag deploys, bringing you to a stop in a
Posted: Sat Jul 09, 2022 12:22 pm
1. You are traveling at 30 mph (13.4 m/s) and you hit a concrete wall. Your airbag deploys, bringing you to a stop in a distance of 30 cm. Assume your mass is 75 kg. What is the force of your body mass on the airbag, in bringing you to a stop?
A) 603 NB) 1125 NC) 8080 ND) 22,400 NE) 1,125,000 N
2. Two cyclists weigh the same, have identical bicycles, and ride up the same mountain with both starting at the same time. Joe rides straight up the mountain, and Bob rides up the longer road that has a lower grade. Joe gets to the top before Bob. Which statement below is true?
A) The amount of work done by Joe equals the amount of work done by Bob, but the average power exerted
by Joe is greater than that of Bob.
B) The amount of work done by Joe is greater than the work done by Bob, and the average power exerted by
Joe is greater than that of Bob.
C) Bob and Joe exert the same amount of work, and the average power of each is also the same.
D) The average power exerted by Bob and Joe was the same, but Joe exerted more work in getting there.
A) 603 NB) 1125 NC) 8080 ND) 22,400 NE) 1,125,000 N
2. Two cyclists weigh the same, have identical bicycles, and ride up the same mountain with both starting at the same time. Joe rides straight up the mountain, and Bob rides up the longer road that has a lower grade. Joe gets to the top before Bob. Which statement below is true?
A) The amount of work done by Joe equals the amount of work done by Bob, but the average power exerted
by Joe is greater than that of Bob.
B) The amount of work done by Joe is greater than the work done by Bob, and the average power exerted by
Joe is greater than that of Bob.
C) Bob and Joe exert the same amount of work, and the average power of each is also the same.
D) The average power exerted by Bob and Joe was the same, but Joe exerted more work in getting there.