A machine that promises more energy output than input is
33%
A ball rolling down an incline has its maximum kinetic energy at
0%
A block of ice sliding down an incline has half its maximum kinetic energy
33%
An object that has kinetic energy must be
Q.2.
the sun
0%
Both a 50-kg sack is lifted 2 meters from the ground and a 25-kg sack is lifted 4 meters in the same time. The power expended in raising the 50-kg sack is
0%
A ball rolling down an incline has its maximum potential energy at
100%
Earth's primary energy source is
0%
A roller skate at rest may have
Q.3.
twice as much
0%
A melon is tossed straight upward with 100 J of kinetic energy. If air resistance is negligible the melon will return to its initial level with a kinetic energy of
0%
Two identical arrows, one with twice the kinetic energy of the other, are fired into a bale of hay. Compared with penetration of the slow arrow, the faster arrow penetrates...
0%
A crate of grapes lifted 10 meters gains 200 J of potential energy. If the same crate is instead lifted 20 meters, its gain in potential energy is
0%
A ball rolling down an incline has its maximum kinetic energy at
Q.4.
solar energy
0%
A roller skate at rest may have
0%
A machine that promises more energy output than input is
0%
An object that has kinetic energy must be
0%
Hydro and wind power are indirect forms of...
Q.5.
nuclear
0%
Hydro and wind power are indirect forms of...
0%
When wind encounters a wind turbine that produces energy, wind speed on the downside of the blades is
0%
The most concentrated form of energy is
0%
The unit kilowatt-hour is a unit of
Q.6.
2000 N
0%
A hydraulic jack is used to lift objects such as automobiles. If the input force is 200 N over a distance of 1 meter, the output force over a distance of 0.1 meter is ideally...
0%
Danny Diver weighs 500 N and steps off a diving board 10 m above the water. Danny hits the water with kinetic energy of
0%
Phil applies 100 N to a pulley system and raises a load one-tenth of his downward pull. Ideally, the weight of the load is
0%
Impulse involves the time that a force acts, whereas work involves the
Q.7.
energy
0%
Hydro and wind power are indirect forms of...
0%
A roller skate at rest may have
0%
An object that has kinetic energy must be
0%
Earth's primary energy source is
Q.8.
2 m
0%
A machine puts out 100 watts of power for every 1000 watts put into it. The efficiency of the machine is...
0%
The power required to exert 4-N force over 3 meters in 2 seconds is
0%
A 2-kg box of taffy candy has 40 J of potential energy relative to the ground. Its height above the ground is
0%
The power expended doing 100 J of work in 50 s is
Q.9.
the bottom
0%
A ball rolling down an incline has its maximum kinetic energy at
0%
If an all-electric car has kinetic energy, then it also must have
0%
A ball rolling down an incline has its maximum potential energy at
0%
Relative to an initial height, an object raised twice as high has a gravitational potential energy
Q.10.
the same
0%
A crate of grapes lifted 10 meters gains 200 J of potential energy. If the same crate is instead lifted 20 meters, its gain in potential energy is
0%
Two identical arrows, one with twice the kinetic energy of the other, are fired into a bale of hay. Compared with penetration of the slow arrow, the faster arrow penetrates...
0%
A ball rolling down an incline has its maximum potential energy at
0%
Both a 50-kg sack is lifted 2 meters from the ground and a 25-kg sack is lifted 4 meters in the same time. The power expended in raising the 50-kg sack is
Q.11.
100 J
0%
A melon is tossed straight upward with 100 J of kinetic energy. If air resistance is negligible the melon will return to its initial level with a kinetic energy of
0%
A miracle car with a 100% efficient engine burns fuel having a 40- megajoules-per-liter energy content. If air drag and overall frictional forces at highway speeds totals 1000 N, what distance per liter can be...
0%
A toy elevator is raised from the ground floor to the second floor in 20 seconds. The power needed using 1000 J of work, is
0%
A machine puts out 100 watts of power for every 1000 watts put into it. The efficiency of the machine is...
Q.12.
distance a force acts
0%
A block of ice sliding down an incline has half its maximum kinetic energy
0%
After rolling halfway down an incline, a marble's kinetic energy is
0%
Impulse involves the time that a force acts, whereas work involves the
0%
The bob of a simple pendulum has its maximum kinetic energy at the
Q.13.
1000 N
0%
When a drawn bow of potential energy 40 J is fired, the arrow will ideally have a kinetic energy
0%
Impulse involves the time that a force acts, whereas work involves the
0%
Phil applies 100 N to a pulley system and raises a load one-tenth of his downward pull. Ideally, the weight of the load is
0%
A melon is tossed straight upward with 100 J of kinetic energy. If air resistance is negligible the melon will return to its initial level with a kinetic energy of
Q.14.
four times as much
0%
After rolling halfway down an incline, a marble's kinetic energy is
0%
When a drawn bow of potential energy 40 J is fired, the arrow will ideally have a kinetic energy
0%
The work you do when pushing a shopping cart twice as far while applying twice the force is
0%
Relative to an initial height, an object raised twice as high has a gravitational potential energy
Q.15.
of 40 J
0%
Both a 50-kg sack is lifted 2 meters from the ground and a 25-kg sack is lifted 4 meters in the same time. The power expended in raising the 50-kg sack is
0%
The work you do when pushing a shopping cart twice as far while applying twice the force is
0%
When a drawn bow of potential energy 40 J is fired, the arrow will ideally have a kinetic energy
0%
A melon is tossed straight upward with 100 J of kinetic energy. If air resistance is negligible the melon will return to its initial level with a kinetic energy of
Q.16.
5000 J
0%
Phil applies 100 N to a pulley system and raises a load one-tenth of his downward pull. Ideally, the weight of the load is
0%
Danny Diver weighs 500 N and steps off a diving board 10 m above the water. Danny hits the water with kinetic energy of
0%
A melon is tossed straight upward with 100 J of kinetic energy. If air resistance is negligible the melon will return to its initial level with a kinetic energy of
0%
When wind encounters a wind turbine that produces energy, wind speed on the downside of the blades is
Q.17.
Art has half the mass of Bart
0%
If you do work on a skateboard loaded with friends in one-third the usual time, you expend
0%
A crate of grapes lifted 10 meters gains 200 J of potential energy. If the same crate is instead lifted 20 meters, its gain in potential energy is
0%
Acrobat Bart at the circus drops vertically onto the end of a see-saw, with his partner Art equidistant from the fulcrum at the other end. Art is propelled straight upward a distance twice that of Bart's dropping distance. Neglecting inefficiencies we see
0%
A 1000-kg car and a 2000-kg car are hoisted to the same height. Raising the more massive car requires...
Q.18.
10%
0%
A melon is tossed straight upward with 100 J of kinetic energy. If air resistance is negligible the melon will return to its initial level with a kinetic energy of
0%
When wind encounters a wind turbine that produces energy, wind speed on the downside of the blades is
0%
A machine puts out 100 watts of power for every 1000 watts put into it. The efficiency of the machine is...
0%
A 2-kg box of taffy candy has 40 J of potential energy relative to the ground. Its height above the ground is
Q.19.
6 W
0%
The power expended doing 100 J of work in 50 s is
0%
A toy elevator is raised from the ground floor to the second floor in 20 seconds. The power needed using 1000 J of work, is
0%
The power required to exert 4-N force over 3 meters in 2 seconds is
0%
A 2-kg box of taffy candy has 40 J of potential energy relative to the ground. Its height above the ground is
Q.20.
the same as its potential energy
0%
After rolling halfway down an incline, a marble's kinetic energy is
0%
A ball rolling down an incline has its maximum potential energy at
0%
A ball rolling down an incline has its maximum kinetic energy at
0%
both require the same
Q.21.
slowed
0%
Relative to an initial height, an object raised twice as high has a gravitational potential energy
0%
When wind encounters a wind turbine that produces energy, wind speed on the downside of the blades is
0%
The work you do when pushing a shopping cart twice as far while applying twice the force is
0%
The most concentrated form of energy is
Q.22.
electricity and heat
0%
Solar power is commonly used to produce
0%
A roller skate at rest may have
0%
After rolling halfway down an incline, a marble's kinetic energy is
0%
An object that has kinetic energy must be
Q.23.
momentum, but less kinetic energy
0%
A ball rolling down an incline has its maximum kinetic energy at
0%
A melon is tossed straight upward with 100 J of kinetic energy. If air resistance is negligible the melon will return to its initial level with a kinetic energy of
0%
A golf ball is thrown at and bounces backward from a massive bowling ball that is initially at rest. After the collision, compared to the golf ball, the bowling ball has more
0%
After rolling halfway down an incline, a marble's kinetic energy is
Q.24.
halfway down
0%
A block of ice sliding down an incline has half its maximum kinetic energy
0%
A machine that promises more energy output than input is
0%
The bob of a simple pendulum has its maximum kinetic energy at the
0%
Relative to an initial height, an object raised twice as high has a gravitational potential energy
Q.25.
heat
0%
When Joshua brakes his speeding bicycle to a stop, kinetic energy is transformed to
0%
A jack system will increase the potential energy of a heavy load by 1000 J with a work input of 2000 J. The efficiency of the jack system is...
0%
When wind encounters a wind turbine that produces energy, wind speed on the downside of the blades is
0%
When a drawn bow of potential energy 40 J is fired, the arrow will ideally have a kinetic energy
Q.26.
50 W
0%
A toy elevator is raised from the ground floor to the second floor in 20 seconds. The power needed using 1000 J of work, is
0%
A machine puts out 100 watts of power for every 1000 watts put into it. The efficiency of the machine is...
0%
A 2-kg box of taffy candy has 40 J of potential energy relative to the ground. Its height above the ground is
0%
A melon is tossed straight upward with 100 J of kinetic energy. If air resistance is negligible the melon will return to its initial level with a kinetic energy of
Q.27.
four
0%
Two identical particles move toward each other, one twice as fast as the other. Just before they collide, one has a kinetic energy of 25 J and the other 50 J. At this instant their total kinetic energy is
0%
When wind encounters a wind turbine that produces energy, wind speed on the downside of the blades is
0%
Two identical golf carts move at different speeds. The faster cart has twice the speed and therefore has _______ times the kinetic energy
0%
Two identical arrows, one with twice the kinetic energy of the other, are fired into a bale of hay. Compared with penetration of the slow arrow, the faster arrow penetrates...
Q.28.
moving
0%
An object that has kinetic energy must be
0%
If an all-electric car has kinetic energy, then it also must have
0%
A ball rolling down an incline has its maximum potential energy at
0%
A machine that promises more energy output than input is
Q.29.
bottom of its swing
0%
The work you do when pushing a shopping cart twice as far while applying twice the force is
0%
A ball rolling down an incline has its maximum kinetic energy at
0%
A ball rolling down an incline has its maximum potential energy at
0%
The bob of a simple pendulum has its maximum kinetic energy at the
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