Name______Period____

Physics Level Force Review - Vocabulary and Formulas

Matching: Match the term to the correct definition.

1. / Normal Force (FN) / a. / When all forces are balanced and acceleration is zero
2. / Net Force (Fnet) / b. / For every action force, there is an equal and opposite reaction force
3. / g / c. / Objects remain at rest or moving at a constant velocity unless acted on by an unbalanced force
4. / Newton (N) / d. / kg m/s2, unit of force
5. / Applied Force (FA) / e. / Sum of all the force vectors acting on an object
6. / Kinetic Friction Force (Ff,k) / f. / The tendancy of an object to maintain its state of motion (at rest or moving with a constant velocity)
7. / Inertia / g. / How hard the surface pushes back on an object; perpendicular to the surface
8. / Force of gravity (Fg) or Weight / h. / The push or pull to get or keep an object in motion
9. / Static Friction Force (Ff,s) / i. / Opposes motion and is what must be overcome to keep an object moving
10. / Mass / j. / Measured in kg and is not affected by gravity
11. / Terminal Velocity / k. / acceleration due to gravity
12. / Newton’s 1st Law (Inertia) / l. / When weight and air resistance balance out for a falling object, it no longer accelerates and thus falls at a constant velocity for the rest of its fall.
13. / Newton’s 2nd Law of Motion / m. / Depends on the surface textures
14. / Newton’s 3rd Law of Motion / n. / Opposes motion and is what must be overcome to start an object moving
15. / Coefficient of friction (m) / o. / F=ma
16. / Equilibrium / p. / The force of the earth (or planet) acting on a mass

17. What is the formula to find Force? What are the units of each quantity?

18. What is the formula to find Weight? What are the units of each quantity?

19. What is the formula to find the force of friction? What are the units of each quantity?

20. Which is greater: static or kinetic friction?

21. What is the value of 'g' on the surface of the earth?

Physics 1 - L Force Review Problems Name______Per._____

1. Melissa has a mass of 60 kg on earth and a weight of 670 N on Neptune. What is the acceleration

due to gravity on Neptune?

2. Zack kicks the 1.2 kg soccer ball with a force of 6.0 N west. At the same time Bryce kicks the ball

with a force of 7.5 N north. What is the acceleration of the soccer ball?

3. A 2.0 kg otter starts from rest at the top of a muddy incline 85 cm long and slides down to the

bottom in 0.50 s. What is the net force on the otter?

4. What is the acceleration of a 15 N box if it is pulled horizontally across the floor with a force

of 85 N and the friction force between the box and floor is 4.0 N?

5. How much force must be applied to a 50 N bowling ball to accelerate it straight upward at a

rate of 4.0 m/s2?