P6 Exam revision

What is the energy conversion when you put batteries in a flashlight to make it turn on?

• chemical to light

• light to kinetic

• chemical to thermal

• nuclear to light

What is the energy conversion when you have a skateboard at the top of the hill then move down?

• kinetic to potential

• potential to kinetic

• potential to thermal

• electrical to kinetic

Which type of simple machine would help you raise a flag on a flagpole?

• Rollers

• Pulley
• Inclined Plane
• Lever

Which type of simple machine is a playground slide? 

• Pulley
• Inclined plane
• Lever
• Rollers

Friction is a force that acts in an ___________ direction of movement.

• similar
• opposite
• parallel
• west

How can friction be reduced?

• reduce the force acting between the 2 surfaces
• reduce the roughness of the 2 surfaces coming in contact
• use wax, grease or oil
• all of the above are ways of reducing friction

Which of the following is an example of friction that is helpful?

• Brakes used on a bike
• Tires from a car on the road
• Tread on the bottom of your shoes
• All are examples that are helpful

Rougher surfaces have ...

• greater friction
• less friction
• the same level of friction

How does friction affect speed?

• more friction decreases speed
• more friction increases speed
• less friction decreases speed
• less friction doesn't affect speed

Which of the following can act as lubricant(s)?

• Oil

• water droplets

• powder

• All of the above