Potential / Kinetic Energy, Newton's Laws Question Preview (ID: 59124)
Potential / Kinetic Energy, Newton's Laws.
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An arrow that is pulled back by a bow has which type of energy?
a) gravitational potential
b) elastic potential
c) chemical potential
d) kinetic energy
Gravitational potential energy depends on the ________ and ________ of the object.
a) Friction and movement
b) Mass and Movement
c) Height, mass and gravitational strength
d) Height and Friction
A 0.40 kilogram bird is flying at a constant speed of 8.0 m/s. What is the bird's kinetic energy ?
a) 12.8 J
b) 2.0 J
c) 4.2 J
d) 3.2 J
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) 4800 J
b) 48,000 J
c) 8000 J
d) 4,000 J
Two objects with different masses are placed on the same shelf. Which object contains more energy?
a) The object with a greater mass has more energy.
b) Both objects have the same amount of energy.
c) Neither object has any energy because they are not moving
d) The object with less mass has more energy.
The faster an object moves, the ________ kinetic energy it has.
a) more
b) less
c) neither of these
d) both of these
The formula for calculating potential energy is ____________________________.
a) PE=mgh
b) PE=2mgh
c) PE=gh
d) PE=mh
The two factors that determine kinetic energy are ____________________________ ____________________________.
a) height and gravity
b) mass and velocity
c) mass and height
d) gravity and velocity
An object at rest will _______ if no outside forces are applied.
a) stay at rest
b) increase velocity
c) decrease mass
d)
A greater applied force is required to move an object with a greater mass than one with a smaller mass.
a) true
b) false
c)
d)
If a baseball and a cannonball are dropped from the same height at the same time, which ball will hit the ground first?
a) the cannonball
b) the baseball
c) both will land at the same time
d) the one with the larger volume
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
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 second law of motion.
c) Newton’s first law of motion for objects in motion.
d) Newton’s third law of motion.
Acceleration is caused by a force acting on a mass.
a) Newton's first law of motion
b) Newton's second law of motion
c) Newton's third law of motion
d)
A greater applied force is required to move an object with a greater mass than one with a smaller mass.
a) true
b) false
c)
d)
Which law explains when a magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.
a) law of acceleration
b) law of inertia
c) law of action-reaction
d)
The force of ____ exists between any two objects that have mass.
a) acceleration
b) weight
c) free fall
d) gravity
A force in the opposite direction to the motion of the object will cause the object to
a) speed up
b) turn
c) slow down
d) crash
When the net force is zero, the forces on an object are balanced. True or false.
a) true
b) false
c)
d)
Any time the forces are unbalanced, an object will remain at rest. True or false?
a) true
b) false
c)
d)
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