Forces

What happens when two forces act in the same direction?

• They cancel each other out.

• The stronger one prevails.

• Their strengths are added.

• Their sum divided by two is the total force.

The greater the mass of an object,

• the easier the object starts moving.

• the greater the inertia.

• the more balanced it is.

• the more space it takes up.

The force of gravity on a person or object on the surface of a planet is called

• mass

• terminal velocity

• weight

• free fall

The force one surface exerts on another when the two rub against each other is called

• friction

• acceleration

• inertia

• gravity

Forces can be added together only if they are

• acting on the same object

• balanced forces

• unaffected by gravity

• substantial

According to Newton's third law of motion, when a hammer strikes and exerts force on a nail, the nail

• creates a friction with the hammer.

• disappears into the wood.

• exerts an equal and opposite force on the hammer.

• moves at a constant speed