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Potential / Kinetic Energy, Newton's Laws
Test Description: Potential / Kinetic energy, Newton's Laws
Instructions: Answer all questions to get your test result.
1) An arrow that is pulled back by a bow has which type of energy?
A
gravitational potential
B
elastic potential
C
kinetic energy
D
chemical potential
2) Gravitational potential energy depends on the ________ and ________ of the object.
A
Mass and Movement
B
Height and Friction
C
Height, mass and gravitational strength
D
Friction and movement
3) A 0.40 kilogram bird is flying at a constant speed of 8.0 m/s. What is the bird's kinetic energy ?
A
3.2 J
B
12.8 J
C
4.2 J
D
2.0 J
4) A 60 kg person walks from the ground to the roof of a 80 m tall building. How much increase in gravitational potential energy is there? (Take g = 10 N/kg)
A
48,000 J
B
8000 J
C
4800 J
D
4,000 J
5) Two objects with different masses are placed on the same shelf. Which object contains more energy?
A
The object with less mass has more energy.
B
The object with a greater mass has more energy.
C
Both objects have the same amount of energy.
D
Neither object has any energy because they are not moving
6) The faster an object moves, the ________ kinetic energy it has.
A
neither of these
B
both of these
C
more
D
less
7) The formula for calculating potential energy is ____________________________.
A
PE=gh
B
PE=mh
C
PE=mgh
D
PE=2mgh
8) The two factors that determine kinetic energy are ____________________________ ____________________________.
A
mass and height
B
height and gravity
C
gravity and velocity
D
mass and velocity
9) An object at rest will _______ if no outside forces are applied.
A
decrease mass
B
stay at rest
C
increase velocity
10) A greater applied force is required to move an object with a greater mass than one with a smaller mass.
A
true
B
false
11) If a baseball and a cannonball are dropped from the same height at the same time, which ball will hit the ground first?
A
both will land at the same time
B
the baseball
C
the one with the larger volume
D
the cannonball
12) According to Newton’s first law of motion, a moving object that is not acted on by an unbalanced force will
A
remain in motion
B
eventually come to a stop
C
change its mementum
D
accelerate
13) A sled sliding on a flat, icy surface with a constant velocity is best described by
A
Newton’s first law of motion for objects at rest.
B
Newton’s third law of motion.
C
Newton’s first law of motion for objects in motion.
D
Newton’s second law of motion.
14) Acceleration is caused by a force acting on a mass.
A
Newton's third law of motion
B
Newton's second law of motion
C
Newton's first law of motion
15) A greater applied force is required to move an object with a greater mass than one with a smaller mass.
A
true
B
false
16) Which law explains when a magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.
A
law of inertia
B
law of action-reaction
C
law of acceleration
17) The force of ____ exists between any two objects that have mass.
A
weight
B
free fall
C
acceleration
D
gravity
18) A force in the opposite direction to the motion of the object will cause the object to
A
slow down
B
turn
C
speed up
D
crash
19) When the net force is zero, the forces on an object are balanced. True or false.
A
false
B
true
20) Any time the forces are unbalanced, an object will remain at rest. True or false?
A
false
B
true
*select an answer for all questions
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