PR ENERGY

Gasoline provides the energy for a car to move. This chemical energy is converted into kinetic energy. If a car doubles its speed, the required energy (gasoline consumption) is then​ (a)   greater

• 4X
• 2X
• 1/2 X
• 1/4 X

A person is located 10 meters above a reference point and has a potential energy of 100J. If the person moved up to 15 meters, what would their new potential energy be?

A spring is compressed 0.03m and has a potential energy of 100J. If the spring is compressed to 0.09m what will the new potential energy be?

Two parent standing on a roof are holding a 80kg mass 6m above a seesaw. They drop it on one end of the seesaw and their daughter on the other has a mass of 40kg. How high up will she go?

Which option shows changes that could be made to have 16X the kinetic energy.

• Double the mass and four times the velocity

• Double the mass and double the velocity

• Double the velocity and four times the mass

• Eight times the mass and double the velocity

A force (F) acts over a distance (x). The resulting velocity is 5 m/s.

If the force was four times greater, what would the velocity be?

The graph best depicts the relationship of ​ (a)  

• Height as a function of energy
• velocity as a function of energy
• Energy as a function of force
• Energy as a function of mass

The graph best depicts the relationship between which two variables? ​ (a)  

• Energy as a function of mass
• Velocity as a function of energy
• Energy as a function of velocity
• Force as a function of distance

A person has a potential energy of 10J. If the person doubles their mass by wearing a weight vest, and climbs up to twice the previous height, what is the new potential energy?

A car has a kinetic energy of 50J. If the driver has friends enter the car doubling the mass of the car and drives at half the speed what is the new kinetic energy?