Download Forces/Newton`s Laws Final Review

Forces/Newton’s Laws Final Review
Name_________________________________________Period__________________Date__________________
1. What is Newton’s first law?
2. What is inertia?
3. What objects have inertia? Do objects in outer-space still have inertia?
4. If an object is at rest and a force is applied to it what will happen?
5. What happens to an object that is moving at a constant speed when a force is applied?
6. True or False: an object moving at a constant speed has balanced forces.
7. The amount of friction between two objects depends on what two factors?
8. Name three types of friction.
9. What is the difference between kinetic friction and static friction?
10. What equation shows Newton’s Second Law?
Forces/Newton’s Laws Final Review
Name_________________________________________Period__________________Date__________________
11. Sumo wrestler 1 is running really fast (and constant velocity), and sumo wrestler 2 is
moving slowly(and constant velocity), but both have the same momentum. What can you
conclude about the relative masses of sumo 1 and sumo 2?
12. What forces are acting on an object that has hit terminal velocity?
13. Are these forces (to create terminal velocity) balanced or unbalanced?
14. How much does a person with a mass of 70kg weigh on earth?
15. How are weight and mass related (on earth and in general)?
16. If I go to the moon, which will change, weight or mass, in which direction does it change,
does it get bigger or smaller?
17. Why does it seem that astronauts “float” in space? Do they still have force acting on
them?
18. A ball that has a mass of 10kg and another ball that has a mass of 5kg are dropped at
the same time from the same height. Which one will hit the ground first, or will they hit at
the same time?
Forces/Newton’s Laws Final Review
Name_________________________________________Period__________________Date__________________
19. What objects have a gravitational pull on other objects?
20. What two things affect the strength of gravitational pull?
21. Which will have more momentum, a truck at rest with a mass of 2000kg, or a truck
traveling at 1m/s with a mass of 1000kg?
22. What is Newton’s third Law?
23. How does a rocket engine work?
24. If I push on a desk, what is the desk doing to me?
25. What two things determine momentum?
26. What is the momentum of an object that has a mass of 50kg and a velocity of 3m/s?
27. What is the Law of Conservation of Momentum?
28. What is the net force on a 3kg block sliding to the right at a constant speed of 4m/s?
Forces/Newton’s Laws Final Review
Name_________________________________________Period__________________Date__________________
29. What is the net force on a 3kg block sliding to the right if it goes from 12m/s to a stop in
4 seconds?
30. What does Newton’s first law have to do with a wearing your seatbelt?
31. A book is at rest on a table-top. A
free-body diagram for this situation
looks like this:
32. A girl is suspended motionless from
a bar which hangs from the ceiling
by two ropes. A free-body diagram
for this situation looks like this:
33. An egg is free-falling from a nest in
a tree. Neglect air resistance. A
free-body diagram for this situation
looks like this:
34. A car is coasting to the right and
slowing down. A free-body diagram would look like this: