# 3. What type of force is the woman applying to cart in the illustration below?

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1 Name: Forces and Motion STUDY GUIDE Directions: Answer the following questions. 1. What is a force? a. A type of energy b. The rate at which an object performs work c. A push or a pull d. An object that makes up matter 2. Force is measured in: a. Newtons b. Joules c. Meters d. Meters per second 3. What type of force is the woman applying to cart in the illustration below? a. An applied force b. Friction c. A gravitational force d. An electric force 4. What type of force opposes motion, causing moving objects to slow down and/or stop? a. An applied force b. Friction c. Magnetic force d. Electric force 5. The force of friction exerted by a surface depends on: a. The color of the surface b. The temperature c. The smoothness of the surface d. The hardness of the surface 6. Drag is a friction-like force exerted by: a. Gases b. Liquids c. Solids d. Both a and b

2 7. Which of the following statements is TRUE regarding air resistance? a. A fast moving object experiences more air resistance than a slow moving object b. A slow moving object experiences more air resistance than a fast moving object c. A streamlined object experiences more air resistance than a blunt-shaped object d. An object will less surface area in contact with air will experience more air resistance than an object with more surface area in contact with air 8. Which force is responsible for causing leaves from a tree to fall to Earth s surface? a. Magnetic force b. Electric force c. Gravitational force d. Friction 9. Which object exerts gravity? a. Earth b. The moon c. A basketball d. All of the above 10. Which graph below correctly describes the relationship between the strength of Earth s gravity and the distance from Earth? a. b. c. d. 11. What force keeps the Earth is orbit around the sun? a. Friction b. Gravity c. Earth s magnetic force d. The sun s magnetic force 12. Jupiter is a much more massive planet than Earth. What would happen to a person s mass and weight if he were on Jupiter? a. His mass and weight would increase b. His mass would increase but his weight would stay the same c. His mass would stay the same but his weight would increase d. His mass nor weight would change 13. What do we call the invisible force exerted by magnets? a. Magnetic force b. Electromagnetic force c. Electric force d. Applied force

3 14. What do you call the area of electric force around an electrically charged object? a. Electric strength b. Electric field c. Electric space d. Electricity 15. A person pulls on a wire that is anchored to a wall. What force pulls back on the person towards the wall? a. Friction b. Spring force c. Tension d. Normal force 16. Which spring below does NOT exert spring force? a. b. c. Stretched Equilibrium Compressed 17. What happens to the motion of an object forces acting on the object are equal and balanced? a. The object begins to move b. The object begins to slow down c. The motion of the object does not change 18. What is the net force acting on the box below? a. 15 Newtons to the right b. 15 Newtons to the left c. 5 Newtons to the right d. 5 Newtons to the left 19. What causes an object to move? a. When balanced forces act on an object b. When unbalanced forces act on an object c. When the total force acting on the object equals zero d. Both a and c

4 20. Which graph below shows an object traveling at a constant velocity? a. b. c. 21. Which graph below shows negative acceleration? a. b. c. 22. What pattern of motion is shown in the diagram below? a. Sliding b. Rotation c. Revolution d. Rolling 23. What pattern of motion best describes Earth s circular path around the sun? a. Sliding b. Rotation c. Revolution d. Rolling 24. Which of following is an example of a periodic motion? a. Rocking b. Swinging c. Bouncing d. All of the above 25. Match each of Newton s Laws with its correct description. a. Newton s 1 st Law 1. For every action there is an equal and opposite reaction. b. Newton s 2 nd Law 2. An object accelerates when a force acts on an object with mass. c. Newton s 3 rd Law 3. An object as rest will stay at rest and an object in motion will continue its motion unless acted on by unbalanced forces.

5 26. What term describes the tendency of an object to resist change in motion? a. Friction b. Inertia c. Momentum d. Collision 27. What term describes the quantity of motion an object has? a. Inertia b. Momentum c. Force d. Gravity 28. Which of Newton s Laws is most important to describing what happens to objects during a collision? a. Newton s 1 st Law b. Newton s 2 nd Law c. Newton s 3 rd Law 29. Two objects collide with each other. What happens to the total momentum of the two objects during a collision? a. The total momentum increases b. The total momentum decreases c. The total momentum of the two objects before the collision equals the total momentum of the two objects after the collision 30. Sort the following forces as contact forces or non-contact forces: Applied, Electric, Friction, Gravity (Gravitational Force), Magnetic Contact Forces Non-Contact Forces 31. How can you reduce friction between objects that rub together? 32. What is the difference between mass and weight? 33. How does an object s size affect the gravity exerted by that object?

6 34. What is the weight of a 50 kg person on Earth? Show your work. (Recall: Fg = mg, Earth s gravity = 9.8 m/s 2 ) 35. What would happen to a boat in water if buoyancy were less than the weight of the boat? 36. Draw an arrow on the diagram to show the direction of the normal force exerted by the table into the box. 37. A car travels 25 meters in 5 seconds. What is the car s velocity? Show your work. (Recall: Velocity = distance time) 38. A car is stopped at a traffic light. The light turns green. It increases its velocity to 50 m/s in 5 seconds. What is the car s acceleration? Show your work. (Recall: Acceleration = change in velocity time) 39. Two football players are running down the field with the same speed. One player has a mass of 50 kg. The other has a mass of 75 kg. Which player has more momentum?

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