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WorksheetsMomentum & Energy
Total questions: 18
Worksheet time: 9mins
A librarian carries a stack of books across the library at a constant speed. How much work does he do on the box while walking across the room?
More information is needed about the distance walked
More information is needed about the weight of the books.
More information is needed about the weight of the books and the distance walked.
None, the force applied and distance are not in the same direction.
Which task requires the most work: lifting a 10 kg sack 3 meters or lifting a 5 kg sack 5 meters?
lifting the 10 kg sack
lifting the 5 kg sack
both require the same amount of work
neither one require work
A teacher pushes a cart 6 meters. A second, identical cart is pushed 3 meters with the same force. The work done on the second cart will be ___ as the work done on the first cart.
half as much
twice as much
four times as much
the same amount
An object is pushed a given distance. A second object is pushed twice the distance with the same force. The work done on the second object is ____ as the work done on the first object.
half as much
twice as much
four times as much
the same amount
A woman walks up a flight of stairs. The gain in her gravitational potential energy is calculated. If she runs up the stairs at twice the speed, her gain in gravitational potential energy will be ____.
1/4
1/2
same
double
4 times larger
An object may have potential energy because of its ___.
acceleration
location
speed
momentum
Two blocks, one 3 times as heavy as the other, are dropped to the ground from the roof of a building. Just before hitting the ground, the heavier block has ___.
as much kinetic energy as the lighter one
1/3 as much kinetic energy as the lighter one
3 times as much kinetic energy as the lighter one
9 times as much kinetic energy as the lighter one
1/9 as much kinetic energy as the lighter one
A book is about to fall off a shelf is an example of which one of the following?
elastic potential energy
chemical potential energy
kinetic energy
gravitational potential energy
Two identical trains are traveling along a track at different speeds. The faster train is going twice the speed of the slower train. The faster train has ___ the kinetic energy of the slower train.
1/4 of
1/2 of
2 times
4 times
Determine which one requires the most work by the brakes on a car.
slowing down from 60 m/s to 50 m/s
slowing down from 60 m/s to 0 m/s
slowing down from 20 m/s to 12 m/s
slowing down from 30 m/s to 10 m/s
A ping pong ball and a bowling ball are dropped from the same height. Ignoring air resistance, which one has the greatest impact speed?
the ping pong ball
the bowling ball
they both have the same speed
speed cannot be known without height
A wooden block is dropped and then kicked across the floor. Energy is transferred in which event?
dropping the block
kicking the block
the block moving along the floor
all of the above
When a fire is burned the energy changes from ___.
kinetic to potential energy
chemical to thermal energy
chemical to mechanical energy
mechanical to thermal energy
A toy rocket is launched into the air with 200 J of kinetic energy, which is transformed to gravitational potential energy at the top of its trajectory. What is the kinetic energy when the rocket returns to its original level after encountering air resistance?
exactly 200 J
more than 200 J
less than 200 J
A 0.5 kg ball dropped from a height of 1.5 meters rebounds to only 1.0 meters after hitting the ground. The reason this happens is because ___.
some energy is converted to heat
some energy is converted to sound
some energy is converted to heat and sound
none of the answers are possibilities
When pole vaulters jump high into the air and land, they land on a big pad. How does the pad help them?
The pad reduces the amount of momentum they have when they land.
The pad reduces the change of momentum when they land.
The pad reduces the total impulse when they land.
The pad increases the time it takes to stop, so the force is less when they land.
A heavy object and a light object have the same momentum. Which has the greater speed?
heavy object
light object
both have the same speed
the heavy object has a zero speed while the light object has a nonzero speed
For the same force, which one imparts a greater momentum to a bullet?
a long gun
a short gun
either long or short depending on the air resistance
neither long or short. The momentum is independent of the length of the gun.
