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Force Review 3
Test Description: Middle school
Instructions: Answer all questions to get your test result.
1) A 25 kg skater pushes off from a wall with a force of 350 N. What is the skater's acceleration?
A
8,750 N
B
14 m/sec2
C
8,750 m/sec2
D
14 N
2) The tendency of an object to remain at rest is called ____
A
inertia
B
velocity
C
acceleration
D
friction
3) The inertia of an object is related to its _____
A
friction
B
mass
C
force
D
velocity
4) A magician suddenly jerks a tablecloth out from under the dishes on a table. The dishes remain in place. This best demonstrates ______
A
the dishes have inertia
B
gravity tends to hold the dishes securely
C
action/reaction pair of forcews
D
the dishes have no acceleration
5) Newton's law that describes action/reaction force pairs is the ______
A
1st Law
B
4th Law
C
3rd Law
D
2nd Law
6) A soccer ball sits still on the ground until someone applies a force by kicking it.
A
3rd law
B
2nd law
C
1st law
D
none of the above
7) The unit for acceleration is the _____
A
meter
B
m/sec2
C
kilogram
D
newton
8) The 1st Law of motion states _____
A
an unbalanced force can change the velocity of an object
B
an object at rest will remain at rest
C
all of the above
D
an object in motion will remain in motion
9) A boat paddle pushes water backwards and the water pushes back on the boat paddle
A
4th Law
B
2nd Law
C
3rd Law
D
1st Law
10) A rocket launches sending gases down to the ground causing the rocket to move upward
A
force = mass x acceleration
B
an object in motion stays in motion
C
balanced forces
D
action and reaction
11) You are sliding down a hill on a box. The box hits a tree branch and stops but you continue moving forward and slide off of the box
A
an object in motion stays in motion
B
balanced forces
C
force = mass x acceleration
D
action and reaction
12) Newton's 2nd law of motion states that ____
A
force equals mass times acceleration
B
force equals acceleration divided by mass
C
every object attracts every other object in the universe
D
force equals mass divided by acceleration
13) How much force is needed to move a 0.5 kg baseball at a rate of 20 m/sec2?
A
40 N
B
100 N
C
4 N
D
10 N
14) Using the equation from Newton's 2nd law of motion, what is the force required to accelerate a 2,000 kg car at 50 m/sec2?
A
10,000 N
B
40 N
C
400 N
D
100,000 N
*select an answer for all questions
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