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WorksheetsQuiz#07:Energy
Total questions: 25
Worksheet time: 29mins
In the diagram, a force is used to stretch a spring. The spring is temporarily deformed when the force is applied. When the force is removed, the spring . . .
returns to its original length.
stays the same length.
A spring extends 1.5m under load 10N. What is its spring constant?
{Hint: Fs =kx}
When comparing spring A to B,
A has a larger spring constant than B so A is a stiffer spring
B has a larger spring constant than A so A is a stiffer spring
A has a larger spring constant than B so B is a stiffer spring
B has a larger spring constant than A so B is a stiffer spring
As the person pulls the block from O to B, the spring potential energy of the system
increases
decreases
remains the same
The ability to move, change matter, or to do work is called ___________.
energy
kinetic energ;y
energy conversion
potential energy
A 5-newton force causes a spring to stretch 0.2 meter. What is the potential energy stored in the stretched spring?
{Hint: PEs =1/2kx2}
A girl on a motorbike passes by at a speed of 15 m/s. Her mass is 40 kg. What is her kinetic energy? {Hint: KE = 1/2 mv2}
Calculate the potential energy of a roller coaster at the top of a 72 m hill that has a mass of 112 kg. {Hint: PE = mgh}
Which has more gravitational energy?
A snowboarder at the top of a mountain
A person laying on the beach
Work equals force times
matter
weight
power
distance
Work is measured in units called
Joules
Power
Force
Newtons
The amount of work done per unit of time is called
Energy
Force
Power
Watt
The law of the conservation of energy says energy cannot be created or
changed
formed
destroyed
stored
A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball? {Hint: W = Fd}
Power = work divided by
Force
Distance
Time
Energy
As the ball is dropped, the potential energy decreases while the kinetic energy increases however the amount of energy stays the same.
True
False
