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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
The floor exerted an opposite force (friction).
C
The floor absorbs the force of the block.
D
All things stop moving eventually.
2) What is true about all forces?
A
They cause objects to move
B
They involve more than one object
C
They are unbalanced
D
They cancel each other out
3) If the net force on an object is zero, what can you conclude?
A
The object is not moving
B
The object is not touching anything
C
The object is slowing down
4) According to Sir Isaac Newton, gravity depends on two factors. What are they?
A
Volume and density
B
Size and shape
C
Mass and volume
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
16 N
B
60 N
C
100 kg
D
16 kg
6) The unit of measurement for force is the ___________.
A
Newton
B
Joule
C
Watt
D
Hertz
7) The push or pull on an object is called ____________.
A
Speed
B
Force
C
Energy
D
Acceleration
8) The combination of all forces acting on an object is the ___________.
A
Joule
B
Net force
C
Unbalanced force
D
Newton
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
it comes to a stop
B
it is on another planet
C
acted upon by an unbalanced force
11) If the mass of an object doubles, the kinetic energy of that object _______________.
A
doubles
B
triples
C
quadruples
D
is cut in half
12) If the speed of an object triples, the kinetic energy of that object ______________.
A
decreases by half
B
doubles
C
increases 9 times (3^2)
D
triples
13) A bowling ball is rolling down a ramp. Which change to the system will increase the KE the most?
A
Doubling the volume of the bowling ball
B
Doubling the speed of the bowling ball
C
Doubling the mass of the bowling ball
D
Doubling the weight of the bowling ball
14) What is the acceleration due to gravity on a free falling object?
A
9.8 m/s^2
B
2 m/s^2
C
15 m/s
D
9.8 m/s
*select an answer for all questions
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