Unit 2 Practice Test

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Unit 2 Practice Test 1 lb = 4.448 N F = ma Fw = mag Part 1: Common Questions (1 point each) Choose the best answer and mark it on your scan. 1. Compared to your weight and mass on Earth, if you were on the moon (gmoon = 1.

1 Unit 2 Practice Test 1 lb = N F = ma Fw = mag Part 1: Common Questions (1 point each) Choose the best answer and mark it on your scan. 1. Compared to your weight and mass on Earth, if you were on the moon (gmoon = 1.6 m/s 2 ) a. Your weight and mass would be less b. Your weight would be less, but your mass would remain the same c. Your weight would remain the same, but your mass would be less d. Your weight would increase, but your mass would stay the same 2. A tow truck pulls a 1,500 kg car with a net force of 2,000 N. What is the acceleration of the car? a m/s 2 b. 3 x 10 6 m/s 2 c m/s 2 d m/s N 250 N 500 N 3. In the picture above, a girl is on a swing. What is the net force on the girl? a. 0 N b. 275 N upwards c. 25 N upwards d. 25 N downwards 4. If a student has a mass of 50 kg on Earth, what is his weight on Earth?

2 a. 50 N b. 490 N c. 250 N d N 5. A safe has a weight of 600 N on Jupiter, which has a gravitational pull of 30 m/s 2. What is the mass of the safe? a kg b. 630 kg c kg d. 20 kg Part 2: Multiple Choice (1 point each) Choose the best answer and mark it on your scan. 6. If a man weighs 150 lbs on Earth, how much does he weigh in Newtons? a. 150 N b. 667 N c. 34 N d. 68 N 7. Objects tend to resist changes in motion. This property is called a. Action/reaction b. Weight c. Momentum d. Inertia 8. What is the approximate weight, in Newtons, of a 7.0 kg bowling ball? a. 7.0 N b. 70 N c. 700 N d. 0.7 N 9. A 0.15 kg baseball and an 8.0 kg bowling ball are both rolling at 3 m/s. Which ball is easier to stop and why? a. The bowling ball because it has less inertia. b. The bowling ball because it has more inertia. c. The baseball because it has less inertia. d. The baseball because it has more inertia.

3 10. A potato launcher uses a spring that can apply a force of 20 N to potatoes. A student launched a 100 g potato, a 150 g potato, and a 200 g potato with the launcher. Which had the greatest acceleration? a. 100 g potato b. 150 g potato c. 200 g potato d. All of the potatoes accelerations are the same. 11. Which of the following is the best example of Newton s First Law? b. Dropping a rock from the top of the Leaning Tower of Pisa vs throwing one 12. Which of the following is the best example of Newton s Second Law? b. Dropping a rock from the top of a building vs throwing one 13. Which of the following is the best example of Newton s Third Law? b. Dropping a rock from the top of the Leaning Tower of Pisa vs throwing one 14. If, simultaneously, a fridge is pushed to the right with a force of 25 N and pushed to the left with a force of 40 N, in which direction will the fridge move and what will the net force acting on the fridge be? a. Right, 15 N b. Left 15 N c. Left 65 N d. The fridge will not move. 15. A crate is being pulled up using 150 N of force and being pulled down using 150 N of force. In which direction will the crate move and what will the net force acting on the crate be? a. Up, 150 N b. Down, 150 N c. Up, 300 N d. The crate will not move.

4 16. A bike is being pedaled with a force of 15 N to the right and pushed to the right with a force of 5 N. In which direction will the bike move and what will the net force acting on the bike be? a. Right, 10 N b. Left, 10 N c. Right, 20 N d. The bike will not move. Part 3: Matching (1 point each) Choose the law that BEST describes each example. a. 1 st Law of Motion b. 2 nd Law of Motion c. 3 rd Law of Motion 17. An adult is able to throw a ball faster than a little child. 18. A stack of books on the desk remains motionless. 19. After hitting the backboard, the ball bounces back at Matt. 20. Cece put on her spike running shoes to increase her speed during the track meet. 21. The bolt that fell off the shuttle will continue to float through space indefinitely. 22. Two football players collide and each fall backwards. Choose the type of measurement that best fits each unit. a. velocity c. acceleration e. force b. mass d. time ab. distance 23. kg 24. km 25. s 26. m/s 27. N 28. min 29. mph 30. m/s lb 32. g 33. mph/s 34. kg*m/s mi

5 Part 4: Problems (3 points each) Use the GUESS method to solve each of the problems below. Formulas are on your test. 36. If a 100 kg object is pushed with a force of 200 N, what is its acceleration? 37. What is the mass of an object that has a force of 80 N, if it accelerates at 20 m/s 2? 38. How much force is required to make a 15 kg object accelerate at 5 m/s 2? 39. What is the acceleration of a box with a mass of 25 kg, if it is being pushed with a force of 200 N to the left and 75 N of force to the right? 40. What is the weight of the Mars Rover, which has a mass of 533 kg, on Mars (gravitymars = 3.8 m/s 2 )?

Chapter 06 Test A. Name: Class: Date: Multiple Choice Identify the choice that best completes the statement or answers the question.

Chapter 06 Test A. Name: Class: Date: Multiple Choice Identify the choice that best completes the statement or answers the question. Name: Class: Date: Chapter 06 Test A Multiple Choice Identify the choice that best completes the statement or answers the question. 1. The property of matter that resists changes in motion is: a. acceleration.