1. A 10kg toy wagon is being pulled by a constant 40N horizontal force for 5.0 s. If the wagon experiences a frictional force of 15 N as it moves, what is the magnitude of the acceleration of the wagon? a. 5.4/2 b. 6.2/2 c. 2.5/2 d. 4.5/2

2. A 20 kg object is accelerated by an unbalanced force. How will the acceleration change if the same unbalanced force acts on a 10 kg object? a. acceleration will be 4 times larger b. acceleration will be 2 times larger c. acceleration will be 3 times larger d. acceleration will be 5 times larger e. acceleration will be 6 times larger f. acceleration will be 7 times larger g. there will be no change in acceleration

3. A helium balloon of negligible mass exerts a force of 300 N [upward] on a 15.0 kg crate. What is the acceleration of the crate? a. 10.2/^2 [] b. 15.4/2[] c. 7.4/^2 [] d. 8.2/^2[]2

4. Which of the following best illustrates Newton's first law of motion? a. a baseball player sliding into home plate b. a child jumping up to grab a ball c. a car uniformly accelerating d. a cart pulled with a constant velocity

5. An 62.0 kg skydiver is falling at a constant velocity of 57.0 m/s. What is the drag force that air resistance is exerting on the sky diver? Choose the closest answer. a. 704 b. 501 c. 507 d. 654 e. 504 f. 607

6. A 10 kg stone accelerates uniformly at 6.0 as it descends to the ocean floor. What is the magnitude of the force of friction of the water? a. 40 b. 38 c. 64 d. 51

7. Two identical satellites are placed into a stable orbit around the Earth. Satellite A is in an orbit that is twice the distance from the Earth than Satellite B. How does the gravitational field strength experienced by Satellite A compare to the gravitational field strength experienced by Satellite B? a. Satellite A experiences a strength twice that of Satellite B. b. Satellite B experiences a strength twice that of Satellite A. c. Satellite A experiences a strength four times that of Satellite B. d. Satellite B experiences a strength four times that of Satellite A.

8. Two 0.0450 kg golf balls are positioned with their centers of mass 0.0500 m apart. What is the gravitational force of attraction between the two golf balls? a. 5.40 1011 b. 8.4 1012 c. 6.8 1020

9. Which of the following statements about dark matter is FALSE? a. Dark matter is a hypothetical kind of matter that can only be detected with a scanning electron microscope. b. Dark matter existence and properties are inferred from its gravitational effects on visible matter, radiation, and the large scale structure of the universe. c. The Milky Way galaxy is estimated to have roughly 10 times more dark matter than regular matter. d. Dark matter neither emits nor absorbs light or any other electromagnetic radiation.

10. Canadian astronaut Chris Hadfield conducted dozens of micro gravity experiments while aboard the International Space Station orbiting Earth. When he was orbiting Earth, which one of the following statements was true? a. He had slightly less mass than he had on Earth. b. He was experiencing zero gravity. c. He was in a state of constant free fall. d. He was experiencing zero gravitational field strength.

11. Chimborazo, the highest mountain in Ecuador, is close to Earth's equator. It is not the highest mountain by elevation, but due to the bulge of Earth at the equator, the summit of Chimborazo is the furthest point from the center of Earth. An atomic clock is placed at sea level at the equator and another clock is placed at the summit of Chimborazo. Which statement about gravitational field strength acting on the two atomic clocks is true? The gravitational field strength is a. the same for both atomic clocks. b. greater at sea level than on the summit of Chimborazo. c. zero at the equator regardless of altitude. d. greater on the summit of Chimborazo than at sea level.

12. A cart on a ship is being pushed at 0.5 m/s [S] while the ship is moving at 2 m/s [N] to the water. What is the velocity of the cart relative to the water? a. 2 m/s [S] b. 1.5 m/s [N] c. 1.5 m/s [S] d. 2m/s [N]

13. An object in uniform circular motion has an acceleration of 2.0 and a period of 2.0 s. If the acceleration increases to 8.0 , what will its new period be? a. 1.0 s b. 5.0 s c. 3.0 s d. 2.0 s