Force and Motion Chapter 2

Which of the following is an example of exerting a force

• a carpenter hammering a nail

• a child running through a field

• a train speeding down a tract

What happens when two forces act in the same direction?

• Their sums divided by two is the total force

• They add together

• The stronger one prevails

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The tendency of an object to resist change is its motion is known as

• inertia

• force

• balance

The greater the mass of an object

• the greater the inertia.

• the easier the object starts moving.

• the more balanced it is.

• The greater the mass of an object

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

• mass

• weight

• terminal velocity

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One way to increase acceleration is by

• decreasing mass

• increasing both force and mass proportionally

• decreasing force

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

• acceleration

• friction

• gravity

Which of the following is an example of rolling friction?

• a boat on water as it sails

• two hands rubbing together

• bike tires on the road as you ride

When the only force acting on a falling object is gravity, the object is said to be

• a projectile

• decelerating

• in free fall

Air resistance is a type of

• friction

• acceleration

• motion