University:
Princeton University
Course:
PHY 103 | General Physics I
Academic year:

2021
Views:

356

Pages:

2
Author:

Prince Sampson

Review for Exam 1 1 - A test car travels in a straight line along the x axis. The graph in the figure shows the car's position x as a function of time. Find its instantaneous velocity at points A, C and E. (Answer: 6.7 m/s, 0 m/s, -40 m/s) 2 - The fastest measured pitched baseball left the pitcher's hand at a speed of 50.0 m/s. If the pitcher was in contact with the ball over a distance of 1.50 m and produced constant acceleration, (a) what acceleration did he give the ball, and (b) how much time did it take him to pitch it? (Answer: 833 m/s2, 0.06 s) 3 - An athlete starts at point A and runs at a constant speed of 6.60 m/s around a round track 250 m in diameter. as shown below. Find the x and y components of this runner’s average velocity and average acceleration between points A and B. (Answer: (4.2 m/s, 4.2 m/s), (0.22 m/s2, -0.22 m/s2)) 4 - A man stands on the roof of a 15.0-m-tall building and throws a rock with a speed of 30.0 m/s at and an angle of 33.0o above the horizontal. You can ignore air resistance. Calculate (a) the maximum height above the roof that the rock reaches, and (b) the horizontal distance from the base of the building to the point where the rock strikes the ground. (Answer: 13.6 m, 103 m) 5 - A fairground ride spins its occupants inside a flying saucer-shaped container. If the horizontal circular path the riders follow has an 8.00-m radius, at how many revolutions per minute are the riders subjected to a centripetal acceleration equal to that of gravity? (Answer: 10.6 rev/min)