Gravity Kinetic Energy Unit Review Question Preview (ID: 41077)
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Sandra pushed a wooden block and it slid across the floor. The block gradually slowed down. Why?
a) The floor exerted an opposite force (friction).
b) The block ran out of force.
c) All things stop moving eventually.
d) The floor absorbs the force of the block.
What is true about all forces?
a) They involve more than one object
b) They cancel each other out
c) They are unbalanced
d) They cause objects to move
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
d)
According to Sir Isaac Newton, gravity depends on two factors. What are they?
a) Mass and distance
b) Mass and volume
c) Volume and density
d) Size and shape
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) 16 kg
c) 60 N
d) 100 kg
The unit of measurement for force is the ___________.
a) Newton
b) Joule
c) Watt
d) Hertz
The push or pull on an object is called ____________.
a) Force
b) Acceleration
c) Speed
d) Energy
The combination of all forces acting on an object is the ___________.
a) Net force
b) Unbalanced force
c) Newton
d) Joule
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
d)
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 comes to a stop
c) it is on another planet
d)
If the mass of an object doubles, the kinetic energy of that object _______________.
a) doubles
b) triples
c) is cut in half
d) quadruples
If the speed of an object triples, the kinetic energy of that object ______________.
a) increases 9 times (3^2)
b) triples
c) decreases by half
d) doubles
A bowling ball is rolling down a ramp. Which change to the system will increase the KE the most?
a) Doubling the speed of the bowling ball
b) Doubling the mass of the bowling ball
c) Doubling the weight of the bowling ball
d) Doubling the volume of the bowling ball
What is the acceleration due to gravity on a free falling object?
a) 9.8 m/s^2
b) 9.8 m/s
c) 15 m/s
d) 2 m/s^2
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