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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
14 N
B
8,750 m/sec2
C
14 m/sec2
D
8,750 N
2) The tendency of an object to remain at rest is called ____
A
friction
B
acceleration
C
inertia
D
velocity
3) The inertia of an object is related to its _____
A
force
B
velocity
C
friction
D
mass
4) A magician suddenly jerks a tablecloth out from under the dishes on a table. The dishes remain in place. This best demonstrates ______
A
action/reaction pair of forcews
B
gravity tends to hold the dishes securely
C
the dishes have inertia
D
the dishes have no acceleration
5) Newton's law that describes action/reaction force pairs is the ______
A
4th Law
B
3rd Law
C
2nd Law
D
1st Law
6) A soccer ball sits still on the ground until someone applies a force by kicking it.
A
1st law
B
2nd law
C
none of the above
D
3rd law
7) The unit for acceleration is the _____
A
m/sec2
B
kilogram
C
meter
D
newton
8) The 1st Law of motion states _____
A
an object in motion will remain in motion
B
an unbalanced force can change the velocity of an object
C
all of the above
D
an object at rest will remain at rest
9) A boat paddle pushes water backwards and the water pushes back on the boat paddle
A
2nd Law
B
3rd Law
C
1st Law
D
4th Law
10) A rocket launches sending gases down to the ground causing the rocket to move upward
A
force = mass x acceleration
B
action and reaction
C
balanced forces
D
an object in motion stays in motion
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
force = mass x acceleration
B
action and reaction
C
balanced forces
D
an object in motion stays in motion
12) Newton's 2nd law of motion states that ____
A
every object attracts every other object in the universe
B
force equals mass times acceleration
C
force equals mass divided by acceleration
D
force equals acceleration divided by mass
13) How much force is needed to move a 0.5 kg baseball at a rate of 20 m/sec2?
A
100 N
B
10 N
C
40 N
D
4 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
40 N
B
10,000 N
C
100,000 N
D
400 N
*select an answer for all questions
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