University:
Jackson College
Course:
PHY 231 | College Physics I
Academic year:

2024
Views:

36

Pages:

10
Author:

bodeur1vli

1. Which one of the following best describes the motion of a projectile close to the surface of the Earth? (assume no friction) VERTICAL ACCELERATION HORIZONTAL SPEED A. constant constant B. constant changing C. changing constant D. changing changing 2 Which one of the following contains two vector quantities? A. Mass, velocity B. Time, momentum C. Force, acceleration D. Speed, displacement 3. The diagram below shows two force vectors and F, acting on an object at point P. h P F १७ IN What is the magnitude of the resultant force? A. 3.0 N B. 5.0 N C. 7.0 N D. 14.3 N 4. The diagram shows the vertical and horizontal components of a force, Fv and Fh. Which of the following is their resultant force F? [Image of a diagram with vectors Fv and Fh] A. B. C. D. 5. A ball is kicked into the air from the surface of a playing field. If friction is negligible, the ball will follow a path that is A. circular. B. elliptical. C. parabolic. D. hyperbolic. 6. A rock is thrown from ground level at 18 m/s, 25° above horizontal. What are the vertical and horizontal components of its launch velocity? [Image of a diagram with a triangle and calculations] A. 7.6 m/s, 16 m/s B. 16 m/s, 7.6 m/s C. 20 m/s, 9.3 m/s D. 9.3 m/s, 20 m/s 7. The graph shown below displays velocity v versus time t for a moving object. [Image of a velocity-time graph] The slope of this graph represents the object's A. mass. B. momentum. C. acceleration. D. displacement. 8. A ball is thrown from ground level at 24 m/s, 30° above horizontal. How much time will it take to reach its maximum height? [Image of a diagram with a triangle and calculations] A. 1.2 s B. 2.1 s C. 2.4 s D. 7.3 s 9. A motorcycle accelerates uniformly from 12 m/s to 30 m/s while travelling 420 m. Its acceleration is A. 0.043 m/s² B. 0.050 m/s² C. 0.10 m/s² D. 0.90 m/s² 10. A rock is thrown from a clifftop at 18 m/s, 25° above the horizontal. It lands on the beach 4.2 s later. [Image of a diagram with a triangle and calculations] a) What is the height h of the cliff? (4 marks) b) How far from the base of the cliff d did the rock land? (3 marks) [Image of calculations and diagrams] 11. Three forces act at point P at the same time, as shown on the force vector diagram below. [Image of a force vector diagram with forces 10N, 12N, and 20N] What is the magnitude of the resultant force vector? 8^2 + 12^2 = R^2 R = 14.4 N A. 14.4 N B. 17.0 N C. 20.0 N D. 24.0 N 12. A ball is rolled off a horizontal roof at 16 m/s. After leaving the roof, how long will the ball take to reach a speed of 18 m/s? [Image of a diagram with velocity vectors and calculations] A. 0.20 s B. 0.84 s C. 1.8 s D. 2.5 s 13. A projectile is fired with an initial velocity of 80 m/s at an angle of 37° above the horizontal. If air resistance is negligible, how much time elapses before the projectile reaches its maximum height? [Image of a diagram with velocity components and calculations] A. 4.9 s B. 6.5 s C. 8.2 s D. 16 s 14. An airplane heads due west with an airspeed of 78 m/s. The wind is blowing due north at 25 m/s. What is the speed of the airplane relative to the ground? [Image of a vector diagram with velocities] A. 53 m/s B. 78 m/s C. 82 m/s D. 103 m/s