Force Review 3 Question Preview (ID: 36023)
Middle School.
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A 25 kg skater pushes off from a wall with a force of 350 N. What is the skater's acceleration?
a) 8,750 m/sec2
b) 14 m/sec2
c) 8,750 N
d) 14 N
The tendency of an object to remain at rest is called ____
a) friction
b) velocity
c) acceleration
d) inertia
The inertia of an object is related to its _____
a) mass
b) velocity
c) force
d) friction
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
Newton's law that describes action/reaction force pairs is the ______
a) 1st Law
b) 2nd Law
c) 3rd Law
d) 4th Law
A soccer ball sits still on the ground until someone applies a force by kicking it.
a) 1st law
b) 2nd law
c) 3rd law
d) none of the above
The unit for acceleration is the _____
a) kilogram
b) newton
c) meter
d) m/sec2
The 1st Law of motion states _____
a) an object at rest will remain at rest
b) an object in motion will remain in motion
c) an unbalanced force can change the velocity of an object
d) all of the above
A boat paddle pushes water backwards and the water pushes back on the boat paddle
a) 1st Law
b) 2nd Law
c) 3rd Law
d) 4th Law
A rocket launches sending gases down to the ground causing the rocket to move upward
a) action and reaction
b) an object in motion stays in motion
c) force = mass x acceleration
d) balanced forces
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) action and reaction
b) an object in motion stays in motion
c) force = mass x acceleration
d) balanced forces
Newton's 2nd law of motion states that ____
a) force equals mass divided by acceleration
b) force equals acceleration divided by mass
c) force equals mass times acceleration
d) every object attracts every other object in the universe
How much force is needed to move a 0.5 kg baseball at a rate of 20 m/sec2?
a) 40 N
b) 10 N
c) 4 N
d) 100 N
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) 400 N
c) 10,000 N
d) 100,000 N
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