Physics 1 Semester 1 Practice Test Questions with Multiple Choice.

Physics 1 Semester 1 Practice Test Questions with Multiple Choice. Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Speed is a. a measure of how fast something is moving. b. always measured in terms of a unit of distance divided by a unit of time. c. the distance covered per unit time. d. all of the above. e. none of the above. ____ 2. One possible unit of speed is a. miles per hour. b. light years per century. c. kilometers per hour. d. all of the above. e. none of the above. ____ 3. Acceleration is defined as the CHANGE in a. time it takes to move from one place to another place. b. velocity of an object. c. distance divided by the time interval. d. velocity divided by the time interval. e. time it takes to move from one speed to another speed. ____ 4. A car starts from rest and after 7 seconds it is moving at 42 m/s. What is the car’s average acceleration? a. 0.17 m/s2 b. 1.67 m/s2 c. 6 m/s2 d. 7 m/s2 e. none of the above ____ 5. If you drop a feather and a coin at the same time in a tube filled with air, which will reach the bottom of the tube first? a. The feather b. Neither—they will both reach the bottom at the same time. c. The coin ____ 6. A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always a. in the direction of motion. b. opposite its velocity. c. directed downward. d. directed upward. ____ 7. The hang time (time one's feet are off the ground in a jump) for most athletes is a. less than 1 second. b. considerably more than 1 second. c. about 1 second. d. slightly more than 1 second. ____ 8. Suppose you take a trip that covers 180 km and takes 3 hours to make. Your average speed is a. 30 km/h. b. 60 km/h. c. 180 km/h. d. 360 km/h. e. 540 km/h. ____ 9. When something falls to the ground, it accelerates. This acceleration is called the acceleration due to gravity and is symbolized by the letter g. What is the value of g on Earth's surface? a. 0 m/s2 b. about 5 m/s2 c. about 10 m/s2 d. about 20 m/s2 e. about 50 m/s2 ____ 10. If a ball were equipped with a speedometer and allowed to fall freely on a planet where the acceleration due to gravity is 23 m/s2 , the reading on the speedometer would increase each second by a. a rate that depends on its initial speed. b. 10 m/s. c. 12 m/s. d. 23 m/s. e. 46 m/s. ____ 11. If a projectile is fired straight up at a speed of 30 m/s, the total time to return to its starting point is about a. 3 second. b. 6 seconds. c. 30 seconds. d. 60 seconds. e. not enough information to estimate. ____ 12. A vector is a quantity that has a. magnitude and time. b. time and direction. c. magnitude and direction. ____ 13. The horizontal component of a projectile's velocity is independent of a. the range of the projectile. b. time. c. the vertical component of its velocity. ____ 14. In the absence of air friction, the vertical component of a projectile's velocity doesn't change as the projectile moves. a. Always false b. Always true c. Sometimes true ____ 15. In the absence of air friction, the horizontal component of a projectile's velocity doesn't change as the projectile moves. a. Sometimes true b. Always true c. Always false ____ 16. At what part of a path does a projectile have minimum speed? a. When it returns to the ground b. Halfway to the top c. At the top of its path d. When it is thrown e. There's not enough information to say. ____ 17. A cannonball is launched from the ground at an angle of 30 degrees above the horizontal and a speed of 30 m/s. Ideally (no air resistance) the ball will land on the ground with a speed of a. 0 m/s. b. 20 m/s. c. 30 m/s. d. 40 m/s. e. There is not enough information to say. ____ 18. An airplane flying into a head wind loses ground speed, and an airplane flying with the wind gains ground speed. If an airplane flies at right angles to the wind, then ground speed is a. more. b. unchanged. c. less. ____ 19. Jose can jump vertically 1 meter from his skateboard when it is at rest. When the skateboard is moving horizontally, Jose can jump a. no higher. b. higher. ____ 20. Which best approximates the resultant of a pair of 6-unit vectors at right angles to each other? a. 0 units. b. 6 units. c. 8 units. d. 12 units. ____ 21. What is the resultant of a 3-unit vector and 4-unit vector at right angles to each other? a. 1 unit. b. 5 units. c. 7 units. d. none of the above ____ 22. When in orbit, a satellite such as the space shuttle is a. simply a projectile. b. in non-accelerated motion. c. free from Earth's gravity. ____ 23. At the instant a ball is thrown horizontally with a large force, an identical ball is dropped from the same height. Which ball hits the ground first? a. Neither—they both hit the ground at the same time. b. The horizontally thrown ball c. The dropped ball ____ 24. A cannonball is fired at some angle into the air. In the first second it moves 5 meters horizontally. Assuming it doesn't hit the ground and air resistance is negligible, how far does it move horizontally in the next second? a. More than 5 m b. Less than 5 m c. 5 m d. Not enough information. ____ 25. A ball is thrown straight upward at 10 m/s. Ideally (no air resistance), the ball will return to the thrower's hand with a speed of a. 0 m/s. b. 5 m/s. c. 10 m/s. d. 20 m/s. e. There is not enough information to say. ____ 26. Galileo found that a ball rolling down one inclined plane would roll how far up another inclined plane? a. The ball would not roll up the other plane at all. b. To nearly its original height c. To about one quarter its original height d. To nearly twice its original height e. To nearly half its original height ____ 27. The law of inertia states that an object a. will continue moving at the same velocity unless an outside force acts on it. b. will continue moving in a straight line unless an outside force acts on it. c. that is not moving will never move unless a force acts on it. d. at rest will remain at rest unless acted on by an outside force. e. will do all of the above.