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Question 1

What is acceleration

Answer 1

Rate at which an object’s velocity changes|speeding up, slowing down and changing direction are all examples of acceleration

Question 2

What is friction?

Answer 2

Forces that oppose the motion or resistance caused when two surfaces touch each other or rub together the amount of friction between two surfaces depends on the texture of those surfaces, smoother surfaces have less friction| two things rubbing on each other

Question 3

What is potential energy?

Answer 3

Energy that is stored available as a result of an object’s position or condition| roller coaster at the top of the hill| objects that are higher have more potential energy

Question 4

Kinetic energy

Answer 4

Energy an object has due to its motion| Roller coaster at the bottom of a hill| faster a thing moves, more kinetic energy it has

Question 5

What is force

Answer 5

A push or pull that acts on an object causes it to move, change speed, direction or to stop moving

Question 6

Net force

Answer 6

The force that results from all the combined forces acting on an object

Question 7

Balanced force

Answer 7

Forces that completely cancel each other out| sitting on a chair

Question 8

Unbalanced forces

Answer 8

When forces act on each other and do not cancel out| ball down hill

Question 9

What is air resistance?

Answer 9

Fluid friction acting on an object, moving through air, for example airplane