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WorksheetsEnergy NCFE Review
Total questions: 16
Worksheet time: 8mins
Why does a student’s hand feel cold when holding an ice cube?
Heat flows from the ice cube to the hand.
Heat flows from the hand to the ice cube.
Cold flows from the hand to the ice cube.
Cold flows from the ice cube to the hand.
What happens to the molecules in a pot of water as it is heated?
they move faster
they move slower
They lose thermal energy
They gain potential energy
Two boxes, X and Y, are on a shelf 10 meters above the floor. Box X has a mass of 4 kg, and Box Y has a mass of 8 kg. Which statement best represents the relationship between boxes X and Y?
Box X and Box Y have no potential energy.
Box X has less potential energy than Box Y.
Box X has more potential energy than Box Y.
Box X and Box Y both have 784 J of potential energy.
Which describes the kinetic energy of a ball in free fall?
The kinetic energy remains the same while the velocity increases.
The kinetic energy decreases because the velocity increases.
The kinetic energy increases because the velocity increases.
The kinetic energy remains the same while the velocity decreases.
The chart below lists the specific heat capacity of four different metals of equal mass. If the temperature of each metal were increased from 20°C to 25°C, which metal
would require the least amount of heat to raise its temperature?
copper
gold
nickel
titanium
A 200-kg rock is at the top of a cliff. What happens to its energy as it begins to fall?
Its kinetic energy is transformed into potential energy.
Its potential energy is transformed into kinetic energy.
Its potential energy increases.
Its kinetic energy decreases.
The chart below shows the force applied on four different objects and the distance each object moves. On which object was the least amount of work done? W=F×d
W
X
Y
Z
It takes 6.0 seconds for a pulley system to lift a crate weighing 300. N to a height of 5.0 meters. How much power is required to life the crate? W=F×d P=tW
360 W
250 W
10 W
0.1 W
When is work done on an object?
when a force is applied to an object and the object remains stationary
when a force is applied to an object and the object moves in the same direction as the force
when the frictional force on an object is greater than a force applied to the object
when two forces of equal magnitude are applied to the object in opposite directions
A person places a metal spoon that is at room temperature into a bowl of a hot soup. How will the thermal energies of the spoon and the soup be affected?
The spoon will increase in thermal energy, and the soup will decrease in thermal energy.
Both the spoon and the soup will increase in thermal energy
The spoon will decrease in thermal energy, & the soup will increase in thermal energy.
Both the spoon and the soup will decrease in thermal energy.
KE=0.5mv2 An object has a mass of 12.8 kg and a velocity of 8.4 m/s. What is the kinetic energy of the object?
53.8 J
107.5 J
451.6 J
903.2 J
GPE=mgh g = 9.8
How much potential energy does a 55-kg person gain when she walks to the top of a hill 20 m tall?
75 J
539 J
1,100 J
10,780 J
A metal spoon is used to stir a pot of boiling water. The person holding the metal spoon feels the spoon get hot.
Which best describes the transfer of heat in the spoon?
radiation
electrical
conduction
convection
W=F×d
A student moves a box across the floor by exerting 23.3 N of force and doing 47.2 J of work on the box. How far does the student move the box?
0.49 m
2.03 m
23.9 m
1,099.8 m
W=F×d
If 15 N of force are applied to a cart to move it a distance of 5 m, how much work is done on the cart?
0.33 J
3 J
15 J
75 J
A ball with a mass of 5 kg is dropped from a resting position of 10 m above the ground. What is the potential energy of the ball just before it is dropped?
0J
49J
98J
490J
