Forces and Motion

Objects remain at rest or in motion unless acted on

by a force.

• Acceleration

• Speed

• Inertia

• Velocity

How an object’s position changes over time.

• Motion

• Gravity

• Velocity

• Forces

An object’s speed in a particular direction.

Ex. driving 55 mph North

• Speed

• Acceleration

• Motion

• Velocity

A measurement of distance over time or how quickly something is being done.

Ex. driving 55 mph, swept the floor for 5 minutes

• Velocity

• Motion

• Speed

• Miles

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The rate in which an object changes it speed or direction.

A change in motion caused by a change in speed.

• Velocity

• Forces

• Acceleration

• Speed

Balanced Force:

Two forces acting in _______________ directions on an object, and ____________

in size.

• same, different

• balanced, force

• opposite, different

• opposite, equal

The combination of all forces on an object.

• unbalanced force

• newtons

• net force

• gravity

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A force that is applied to an object by a person or another

object.

• direct force

• balanced force

• unbalanced force

• applied force

Samantha drops a ball and it falls to the ground. What does this illustrate about gravity?

• Gravity pulls the ball toward the center of Earth.

• Gravity causes the friction on the ball to disappear.

• Gravity pushes the ball away from Suzette’s hands.

• Gravity causes the mass of the ball to decrease as it falls.

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The jet engines of a moving plane exert a force to make the plane travel forward at a constant speed. Which of these changes to the jet is likely to happen if the engines exert a greater force?

• increase in weight

• balance of forces

• decrease in braking distance

• increase in speed

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