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Gravity Kinetic Energy Unit Review
Test Description: This tests your knowledge of this unit.
Instructions: Answer all questions to get your test result.
1) Sandra pushed a wooden block and it slid across the floor. The block gradually slowed down. Why?
A
The block ran out of force.
B
All things stop moving eventually.
C
The floor absorbs the force of the block.
D
The floor exerted an opposite force (friction).
2) What is true about all forces?
A
They cause objects to move
B
They are unbalanced
C
They cancel each other out
D
They involve more than one object
3) If the net force on an object is zero, what can you conclude?
A
The object is not moving
B
The object is slowing down
C
The object is not touching anything
4) According to Sir Isaac Newton, gravity depends on two factors. What are they?
A
Size and shape
B
Mass and volume
C
Volume and density
D
Mass and distance
5) Moon's gravity is .16 of Earth's gravity. You weigh 100 N on Earth, how much do you weigh on Moon?
A
60 N
B
16 kg
C
100 kg
D
16 N
6) The unit of measurement for force is the ___________.
A
Hertz
B
Watt
C
Newton
D
Joule
7) The push or pull on an object is called ____________.
A
Energy
B
Acceleration
C
Speed
D
Force
8) The combination of all forces acting on an object is the ___________.
A
Newton
B
Unbalanced force
C
Joule
D
Net force
9) Which of Newton's Laws states that for every action, there is an equal and opposite reaction?
A
Newton's Third Law
B
Newton's First Law
C
Newton's Second Law
10) An object at rest will stay at rest and an object in motion will stay in motion unless
A
acted upon by an unbalanced force
B
it is on another planet
C
it comes to a stop
11) If the mass of an object doubles, the kinetic energy of that object _______________.
A
quadruples
B
doubles
C
is cut in half
D
triples
12) If the speed of an object triples, the kinetic energy of that object ______________.
A
decreases by half
B
triples
C
increases 9 times (3^2)
D
doubles
13) A bowling ball is rolling down a ramp. Which change to the system will increase the KE the most?
A
Doubling the mass of the bowling ball
B
Doubling the weight of the bowling ball
C
Doubling the speed of the bowling ball
D
Doubling the volume of the bowling ball
14) What is the acceleration due to gravity on a free falling object?
A
9.8 m/s
B
15 m/s
C
2 m/s^2
D
9.8 m/s^2
*select an answer for all questions
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