Y10 Physics Energy

Which one of the following is true about energy?

• Energy is destroyed due to frictional forces

• Energy is the measure of the ability to do work

• More energy is available when there is more power

• Energy and power measure the same thing

Which of the following shows the formula for efficiency in %?

• Efficiency = total energy / useful energy x 100

• Efficiency = input energy / output energy

• Efficiency = total energy / output energy x 100

• Efficiency = useful energy / total energy x 100

What energy transformations are happening when a cat falls out of a tree and hits the ground?

• Gravitational potential -> kinetic energy -> sound / heat / kinetic

• Kinetic -> gravitational > sound / heat / kinetic

• Gravitational -> spring

• Kinetic -> heat/sound

Niagara Falls is a good example of

• Kinetic energy being transformed into potential energy
• Potential energy being transformed into kinetic energy
• Energy being created
• Energy being destroyed

 The law of conservation of energy states that when one form of energy is converted into another,

• Energy is destroyed in the process
• Energy is created in the process
• No energy is destroyed in the process
• Energy is lost in the process

Which energy-conversion process occurs whenever coal is burned at a power station?

• chemical to nuclear
• chemical to sound
• chemical to electrical
• mechanical to electrical

When energy moves from one form to another it is said to be _________________

• Transformed
• Eliminated
• Lost.
• Created 

The energy associated with motion is called

• Kinetic energy
• Elastic potential energy
• Gravitational potential energy
• Nuclear energy

An example of something that stores chemical energy is

• lightning
• a microwave
• a match

Which of the following has kinetic energy?

• a rock poised for a fall
• an archer's bow that is drawn back
• a rolling bowling ball