Who Wants to be a Genius?

1. Who Wants to be a Genius? Chapter 16 Test Review Force and Newton’s Laws

2. Why does a feather fall through the air more slowly than a brick? • Gravity • Inertia • Air resistance • Momentum

3. What is the reaction force to Earth’s gravity when a diver jumps off a diving board? • The diver’s legs push against the board • Friction between the diver and water slows the diver • Air resistance slows the diver • The diver pulls Earth up

4. A 200-N force gives an object an acceleration of 10 m/s2. The mass of the object is ____. • 20 kg • 2000 kg • 210 kg • 100 kg

5. Air resistance ___ as you move faster. • remains the same • eventually disappears • decreases • increases

6. Forces that are equal in size but opposite in direction are ____. • inertial forces • frictional forces • balanced forces • net forces

7. Whenever a body is in motion, there is always ___ to oppose the motion. • friction • gravity • acceleration • inertia

8. According to Newton’s second law of motion, ____ • F=mv • F=m/a • a=Fnet/m • F=ma

9. If gravity did not affect the path of a horizontally thrown ball, the ball would ____. • go straight up • fall straight down • follow a curved path • travel horizontally

10. With action-reaction forces, ___ • The forces are created at the same time • Both forces already existed • The reaction force is created first • The action force is created first

11. The upward force on an object falling through the air is ___ • inertia • terminal velocity • gravity • air resistance

12. A 500-N force acts on a 50-kg object. The acceleration of the object is ___. • 25000 m/s2 • 450 m/s2 • 10 m/s2 • 550 m/s2

13. Newton’s first law of motion states that an object remains at rest unless a ___ force acts on it. • balanced • net • gravitational • frictional

14. The statement “for every action, there is an equal but opposite reaction” is a statement of ___. • Newton’s first law • Newton’s second law • Newton’s third law • The law of conservation of momentum

15. The force you have to overcome to start on object moving is ___. • air resistance • sliding friction • rolling friction • static friction

16. The relationship among force, mass, and acceleration is stated in ___. • Newton’s first law of motion • Newton’s second law of motion • Newton’s third law of motion • The law of conservation of momentum

17. The tendency of an object to resist any change in its motion. • inertia • speed • momentum • friction

18. If you triple the net force on an object, the acceleration will __. • stay the same • double • triple • decrease

19. To keep a cart rolling downhill, the force of gravity must be greater than the _____ force. • unbalanced • balanced • frictional • net

20. A push or pull that one object exerts on another. • Force • Gravity • Inertia • Momentum

21. A rocket launching is an example of Newton’s _______. • first law • second law • third law • law of conservation of momentum