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3rd SW #3 Forces
Contributed by: Ruble
1.  For every action, there is an equal but opposite reaction. This is ........
Newton's First law of motion
 Newton's Second law of motion
Newton's Third law of motion
2. An object in motion will remain in motion andan object at rest will remain at rest, unless acted upon by a force. This is ..........
Newton's second law of motion
Newton's first law of motion
Newton's third law of motion
3.  Net force is equal to mass times acceleration.    (E = m   a) Acceleration depends on mass of the object and the forceapplied.   This is ......... 
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
4. A push or pull on an object is: 
Friction
Gravity
 Mass
Force
5. The distance an object can travel, and the amount of 
time it took to go that distance is referred to as......
Acceleration
Speed
Velocity
6. A balanced force is:
Forces of equal strength acting in the same direction
     to the right.
Forces of equal strength acting in the same direction
     to the left.
 Forces of equal strength acting in opposite directions.
7. An unbalanced force is:
When the force acting on an object changes the      position, direction, or speed of the object's motion.
 When the force acting on an object changes does 
      not change the position, direction, or speed of the
      object's motion.
No change in motion. It's a tie.
Forces of equal strength.
8. How will this object move?
It won't move
It will move to the right with 20 N of force.
It will move to the left
 It will move to the right with 80 N of force.
9. What is the net force?
30 N left
 5 N left
25 N right
55 N right
10. Calculate the net force.
 60 N left
0 N balanced
100 N right
60 N right
11. Calculate the net force.
0 N balanced
40 N left
75 N right
 40 N right
12. The tendency of an object at rest to stay at rest
      unless acted upon by a force is called:
 inertia
gravity
lubricant
motion
13. Forces that have a net force of zero (the object is still).
 balanced force
unbalanced force
14. All the combined forces exerted on an object....
Contact Force
Unbalanced Force
Balanced Force
 Net Force
15. What will cause an object to move?
Unbalanced forces
 Applied forces
Balanced forces
16. Which of the following is not a distance force?
A
C
B
D
17. Which of the following is not a contact force?
 C
A
B
D
18. What is the net force and direction of the bird?
9 N up
9 N down
31 N down
 41 N up
19. What is the unit of force?
Pascal
 Kilogram
Newton
Meter
20. Why does a book on a table not move?
 No forces are acting on the book
Gravity is the only force acting on the book.
Forces of the table pushing up and gravity      pulling down are balanced
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