Physical Sci: Ch. 2 Forces

Which of the following is an example of exerting a force?

• a child running through a field

• a train speeding down a track

• a carpenter hammering a nail

• an airplane soaring through the sky

What happens when two forces act in the same direction?

• they cancel each other out

• the stronger one prevails

• they add together

• their sum divided by two is the total force

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

• mass

• inertia

• force

• balance

The greater the mass of an object,

• the more force it can exert

• the greater its inertia

• the more balanced it is

• the more space it take up

Force = mass multiplied by ________

• speed

• motion

• acceleration

• inertia

One way to increase acceleration is by

• increasing mass

• decreasing mass

• decreasing force

• increasing both force and mass equally

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

• friction

• acceleration

• inertia

• gravity

Which of the following is an example of rolling friction?

• your shoes on a sidewalk as you walk

• bike tires on the road as you ride

• a boat on the water as it sails

• two hands rubbing together

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

• stationary

• decelerating

• in free fall

• a projectile

Air resistance is a type of

• motion

• acceleration

• velocity

• friction