1. A force is defined as: a. A push only b. A pull only c. A push or a pull d. None of the above 2. What unit do scientists use to measure force? a. Newton b. Grams c. Meters d. Me... 1. A force is defined as: a. A push only b. A pull only c. A push or a pull d. None of the above 2. What unit do scientists use to measure force? a. Newton b. Grams c. Meters d. Meter per second per second 3. When you slide a toy car across the floor, what force must your push be stronger than? a. Support force b. Friction force c. Gravity d. Air resistance 4. A piece of paper is at rest on your desk. Which of the following statements best describes this situation? a. There are no forces acting on the paper. b. The paper pushes on the desk only. c. The desk pushes on the paper only. d. The forces acting on the paper are balanced. 5. Which force always pulls downward on objects? a. Support force b. Friction force c. Gravity d. Air resistance 6. A change to an object's motion is caused by... a. Balanced forces b. Unbalanced forces c. Acceleration d. Velocity 7. When a balloon held between the hands is pressed, its shape changes. This happens because: a. Balanced forces act on the balloon b. Unbalanced forces act on the balloon c. Frictional forces act on the balloon d. Gravitational force acts on the balloon 8. A force that opposes motion between two surfaces that are in contact is called: a. Friction b. Motion c. Velocity d. Acceleration 9. What is the common unbalanced force acting on an object in motion? a. Inertia b. Acceleration c. Friction d. Speed 10. Which of the following balls has the greatest inertia? a. Ping pong ball b. Soccer ball c. Tennis ball d. Bowling ball 11. The inertia of an object is related to its: a. Mass and speed b. Mass and force c. Mass only d. Speed only 12. The amount of matter in an object is called its: a. Inertia b. Balance c. Force d. Mass 13. Which of the following must remain unchanged to have a constant velocity for an object in motion? a. Speed only b. Friction and speed only c. Speed and mass only d. Speed and direction of travel 14. Which of the following terms is most often used by a physicist when describing the motion of an object that includes both its speed and direction? a. Momentum b. Distance c. Velocity d. Rate 15. The greater the mass of an object: a. The easier the object starts moving. b. The more balanced it is. c. The greater its inertia. d. The more space it takes up. 16. Which scientist is best known for formulating the laws of motion and universal gravitation? a. Galileo Galilei b. Albert Einstein c. Isaac Newton d. Johannes Kepler 17. What is Newton's First Law of Motion commonly referred to as? a. Law of Acceleration b. Law of Inertia c. Law of Action-Reaction d. Law of Gravity 18. According to Newton's First Law of Motion, an object at rest will stay at rest unless: a. A force is applied to it b. It experiences friction c. It is in a vacuum d. It is heated 19. Which of the following best describes inertia? a. The tendency of an object to speed up b. The tendency of an object to resist changes in its state of motion c. The force acting on an object d. The acceleration of an object when a force is applied 20. What force primarily opposes the motion of a car when it brakes? a. Gravity b. Friction c. Inertia d. Air resistance Read more