Forces Quiz

The greater the mass of an object,

• the easier the object starts moving

• the greater its 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

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

When the only force acting on a falling object is air resistance, the object is said to be in free fall.

• True

• False

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

• attract each other

• repel each other

• combine to provide a balanced force

• create friction

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

• friction

• acceleration

• inertia

• gravity

According to the law of conservation of momentum, when two objects collide in the absence of outside forces

• velocity decreases

• velocity increases

• the objects have the same momentum before and after they collide

• the objects have more momentum after they collide than they did before

Any force that causes an object to move in a circle is called a(n)

• balanced force

• unbalanced force

• gravitational force

• centripetal force

Forces can be added together only if the 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