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Chapter 12 Review 3
Test Description: Newton's laws of motion
Instructions: Answer all questions to get your test result.
1) What is the momentum of a 60 kg ice skater gliding across the ice at a speed of 2 m/s
A
240 kgxm/s
B
30 kg/ m/s
C
60 kg
D
120 kgxm/s
2) The gravitational force between two objects increases as mass
A
decreases or distance increases
B
increases or distance increases
C
decreases or distance decreases
D
increases or distance decreases
3) The mass of a newborn baby is 3.9 kg. What is the baby's weight?
A
3.9 N
B
23 N
C
38.2 N
D
9.8 N
4) A 36 kg canoe broke free of its dock and is now floating downriver at a speed of 2.9 m/s. What is the canoe's momentum?
A
9.8 kgxm/s
B
38.2 kgxm/s
C
104.4 kgxm/s
D
145 kgxm/s
5) What happens to the magnitude of the fluid friction acting on a submarine as the submarine's speed increases?
A
Not enough information to tell
B
It Increases
C
It does not change
D
It decreases
6) Why don't action-reaction forces cancel each other out
A
Act on different objects
B
they do cancel each other out
C
the reaction force is larger
D
the action force is larger
7) What law states that if no net force acts on a system, then the total momentum of the system does not change?
A
Newton's second law
B
The law of conservation of momentum
C
Newton's first law
D
Newton's third law
8) If three balls are released at the same time from the same height, which one will hit the ground first?
A
Ball 1
B
The will each hit at the same time
C
Ball 3
D
Ball 2
9) How are the size and direction of action-reaction forces related?
A
Equal in size, equal in direction
B
Opposite in size, equal in direction
C
Opposite in size, Opposite in direction
D
Equal in size, opposite in direction
10) How can you double the acceleration of an object if you cannot alter the object's mass?
A
Double the force
B
Cut the mass in half
C
Cut the force in half
D
Double the mass
*select an answer for all questions
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