Chapter 11 Review Science

What is the change in velocity over time?

• distance

• speed

• momentum

• acceleration

When two forces act on an object in opposite directions, it is called a (n)

• balance force.

• unbalance force.

• reaction force.

• action force.

Energy that is stored is called

• heat energy.

• kinetic energy.

• sound energy.

• potential energy.

What kind of machine takes one force and changes it to a different force?

• simple

• complex

• coiled

• single

The force applied to a machine is called

• effort.

• load.

• mass.

• input.

What type of Machine is formed when two or more machines are combined?

• simple

• compound

• complex

• single

An object that moved as a result of a machine working is called the

• output.

• load.

• effort.

• mass.

Which formula is used to calculate acceleration?

• time x change in speed

• change in speed x time

• time ÷ change in speed

• change in speed ÷ time

Two forces acting in a way that changes the object's motion create a(n)

• unbalanced force.

• reaction force.

• action force.

• balanced force.

Energy of a moving object is called

• kinetic energy.

• stored energy.

• periodic energy.

• potential energy.