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WorksheetsPRINCIPLE OF CONSERVATION OF ENERGY
Total questions: 18
Worksheet time: 8mins
Which statement describes the principles of conservation of energy?
Energy can be destroyed
Energy can created
Energy can change its form
Energy can retain its value
What is the change of energy form when the trolley moves down the runway?
Gravitational potential energy to kinetic energy
Kinetic energy to gravitational potential energy
Elastic potential energy to kinetic energy
Kinetic energy to elastic potential energy
The diagram shows a ball rolling down a surface. at Which position does the ball possess maximum kinetic energy and maximum potential energy?
Max kinetic energy = P. Max potential energy=Q
Max kinetic energy = P. Max potential energy=R
Max kinetic energy = Q Max potential energy=P
Max kinetic energy = R. Max potential energy=P
The Law of Conservation of Energy states:
Energy can created or destroyed but not transformed
Energy cannot be created or destroyed, it can only transformed
Energy can't be created, destroyed or transformed
Energy cannot be created or destroyed.
What is the formula for Kinetic Energy?
KE = mass x velocity
KE= 1/2 x mass x velocity 2
KE = mass x gravity x height
KE = mass x velocity / 2
What force causes a roller coaster cart to slow down the most?
friction
weight
gravity
air resistance
What happens when the ball goes from the highest position to the lowest position
PE and KE increases and decreases together
Impossible to know without knowing the mass of the object
the PE decreases while KE increases
A ball is projected into the air. Where is potential energy the greatest?
Calculate the potential energy when the roller coaster is at point Y. The mass of the roller coaster is 100kg.
Gravitational potential energy = mass, m x gravitational acceleration, g x height. Use g = 10 m/s2
3000 J
6000 J
9000 J
120000 J
Which of the position of the ball ONLY possesses gravitational potential energy? Tick the correct answers.
A
B
C
D
Jack fired a cannonball with a mass of 2 kg into the air. The cannonball went up to 500 m before it beings to fall to the ground. Calculate the velocity of the cannonball before it begins to fall to the ground.
100 m/s
250 m/s
500 m/s
1000 m/s
A stone with a mass of 4 kg is dropped from a height of 4 m. Calculate the kinetic energy of the rock when the rock falls to the ground.
180 J
160 J
1800 J
2400 J
