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

2023
Views:

350

Pages:

8
Author:

punisqtp4

Name: Kinematics Review 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 F and F acting on an object at point P. R F 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 -1- 4. The diagram shows the vertical and horizontal components of a force, Fy and F- Which of the following is their resultant force F? A. F B. C. F 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. C. parabolic. B. elliptical. 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? VERTICAL COMPONENT A. 16 m/s B. 7.6 m/s C. 20 m/s D. 9.3 m/s HORIZONTAL COMPONENT 7.6 m/s 16 m/s 9.3 m/s 20 m/s 14 F D. F 7. The graph shown below displays velocity v versus time for a moving object. The slope of this graph represents the object's A. mass. B. momentum. C. acceleration. D. displacement. 8. A ball is thrown from level ground at 24 m/s, 30 above horizontal. How much time will it take to reach its maximum height? A. 1.25 B. 2.1s C. 2.45 D. 7.35 A motorcycle accelerates uniformly from 12 m/s to 30 m/s while travelling 420 m. Its acceleration is A.0.043m/s B. 0.050 m/s2 C. 0,10/5 D.0.90 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. 18 m/s 25° a) What is the height h of the cliff? d (4 marks) b) How far from the base of the cliff d did the rock land? (3 marks) 11. Three forces act at point P at the same time, as shown on the force vector diagram below. 2.0 N P 12.0 N 10.0 N What is the magnitude of the resultant force vector? 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? A. 0.20 s B. 0.84 s C. 1.8 5 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? 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? A. 53 m/s B. 78 m/s C. 82 m/s D. 103 m/s -3- 15. A rocket accelerates at 15 m/s² from rest for 21 m on a frictionless horizontal surface. The rocket stops firing at the cliff and falls freely from a height of 45 m. a = 15 m/s² 21 m 45 m water R If air resistance is not significant, what is the distance R when the rocket hits the water? (7 marks) 16. On a football field, Joe Speedy carries the ball for 8.0 m toward the east, then makes a right turn and proceeds 10.0 m directly south, then he is stopped by a tackle. What is Joe's resultant displacement? (Your answer must include a neatly drawn vector diagram.) 17. An aircraft has a velocity of 951 km/h, in a direction 30° west of north. What is the west component of the aircraft's velocity? (Include a neatly drawn vector diagram.) 18. Which one of the following is a scalar quantity? A. force B. mass C. momentum D. velocity 19 A golfer walks 120.0 m north, then 50.0 m east. What is the magnitude of the resultant displacement of the golfer? A. 70.0 m B. 130.0 m C. 170.0 m D. 109.0 m 20. Two aircraft approach each other 'head-on'. Plane A is moving with a velocity of 600.0 km/h relative to the ground. Plane B is moving with a velocity of 500.0 km/h relative to the ground. What is the velocity of plane A relative to plane B? A. 500.0 km/h B. 600.0 km/h C. 100.0 km/h D. 1100.0 km/h

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