EFM Mix

Objects falling through air experience a type of fluid friction called

• Air reduction

• Gravity

• Free fall

• Air resistance

When an unbalanced force acts on an object, the force

• changes the motion of the object

• is canceled out by another force

• does not change anything

• is equal to the weight of the object

Which of the following is not a projectile?

• a satellite

• a thrown ball

• a ball on the ground

• a soaring arrow

The resistance of an object to any change in its motion is called

• Inertia

• Friction

• Gravity

• Weight

What force makes it less likely for a person to slip on a dry sidewalk as opposed to an icy one?

• Air resistance

• Friction

• Inertia

• Momentum

Which one of the following is determined by the force of gravity?

• Weight

• Momentum

• Mass

• Distance

A change in position with respect to a reference point is called

• Acceleration

• Velocity

• Direction

• Motion

You do not know an object's velocity until you know its

• speed and distance

• reference point

• speed and direction

• acceleration

Acceleration is the change in speed or

• time

• distance

• direction

• slope

The rate at which velocity changes is called

• acceleration

• average speed

• instantaneous speed

• constant speed