Physics Level Force and Motion Review 2010
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 (() |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?
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Force Diagram
Force Diagram
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