Forces Chapter 2

What happens when two forces act in the same direction?

• Their sum is divided by two is the total force.

• Their strengths are added.

• The stronger one prevails.

• They cancel Each other out.

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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.

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

• mass

• weight

• terminal velocity

• free fall

The force that one surface exerts on another when they rub together is called

• inertia

• acceleration

• friction

• gravity

Forces can be added together only if they are

• balanced forces

• acting on the same object

• substantial

• unaffected by gravity

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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 then they did before.

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

• repel each other.

• attract each other.

• create friction.

• combine to provide a balanced force.

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

• balanced force.

• unbalanced force.

• gravitational force .

• centripetal force.

The momentum of an object is in the same direction as its

• force

• acceleration

• velocity

• inertia

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In physical science, a push or a pull is called a(n)

• force.

• acceleration.

• inertia.

• motion.

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