Savvas Topic 10: Forces and Motion

Front

What happens when two forces act in the same direction?

Back

Their strengths are added.

Front

The greater the mass of an object,

Back

the greater its inertia.

Front

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

Back

weight.

Front

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

Back

friction.

Front

The law of universal gravitation states that any two objects in the universe that have mass, without exception,

Back

attract each other.

Front

Forces can be added together only if they are

Back

acting on the same object.

Front

The rate at which velocity changes is called

Back

acceleration.

Front

What is the SI unit of acceleration?

Back

m/s²

Front

Which of these is an example of deceleration? Options: a bird taking off for flight, a roller coaster moving down a steep hill, a car approaching a red light, an airplane following a straight flight path

Back

a car approaching a red light

Front

According to Newton’s third law of motion, when a hammer strikes and exerts force on a nail, what happens?

Back

exerts an equal and opposite force on the hammer.