Forces and Motion (Physics)


Content Standards






8.1 - An objectís inertia causes it to continue moving the way it is moving unless it is acted upon by an outside force to change its motion.

Law 1: Inertia




a)                 The motion of an object can be described by its position, direction of motion and speed.

Describing Motion PDF

Describing Motion Quiz


Bill Nye: Motion*



C 22. Calculate the average speed of a moving object and illustrate the motion of objects in graphs of distance over time.

Average Speed



Distance/Time Graphs


Velocity of a Line

Speed Practice Problems

Speed Problems 2


D/T Graph Practice 1

D/T Graph Practice 2

Velocity Practice Problems

Speed =/= Velocity

Speed vs Velocity Review

Bubble Tube Lab

Speed, Distance, or Time?

Speed, Distance, Time Units

Make Your Own D/T Graph


Speed/Time Graph* (Extension)

Velocity Lab


Speed Study Guide

Speed Quiz


D/T Graph Quiz


Speed vs Velocity Quiz



Motion Test A

Motion Test C

b) An unbalanced force acting on an object changes its speed and/or direction of motion.


Why m/s2???

Forces and Motion PDF

Forces and Motion Quiz

Unbalanced Force

Acceleration Practice 1

Acceleration Practice 2

Bill Nye: Momentum*

What is a force?

[Shipping & Sliding CMT Lab]


C 23. Describe the qualitative relationships among force, mass and changes in motion.


Law 2: F=ma

F=ma Practice 1

F=ma Practice 2

F=ma Practice 3


[Car Crash Activity]

[Egg Drop]

[Water Rockets]


c) Objects moving in circles must experience net force acting toward the center.

Friction, Gravity, and Circular Motion PDF

Friction, Gravity, and Circular Motion Quiz

Centripetal Force

Bill Nye: Friction



C 24. Describe the forces acting on an object moving in a circular path.

Law 3: Action/Reaction

Centripetal Force

How can anything move?

[Constant V car lab]







Extra Resources

Physics in a Nutshell

Work = Force x Distance Worksheet


[How Powerful Are You?]

Speed/Time Graph (Extension)

Newton Word Problems




Bill Nye: Momentum




[FPG-9 Glider Lab]




[Soda Straw Glider]



Grade Level Expectations:

1.                 Use appropriate tools and techniques to make observations and gather data to determine how forces, including friction, act on an object to change its position over time in relation to a fixed point of reference.

2.                 Calculate the average speed of a moving object, and distinguish between instantaneous speed and average speed of an object.

3.                 Create and interpret distance-time graphs for objects moving at constant and nonconstant speeds.

4.                 Predict the motion of an object given the magnitude and direction of forces acting on it (net force).

5.                 Investigate and demonstrate how unbalanced forces cause acceleration (change in speed and/or direction of an objectís motion).

6.                 Assess in writing the relationship between an objectís mass and its inertia when at rest and in motion.

7.                 Express mathematically how the mass of an object and the force acting on it affect its acceleration.

8.                 Design and conduct an experiment to determine how gravity and friction (air resistance) affect a falling object.

9.                 Illustrate how the circular motion of an object is caused by a center-seeking force (centripetal force) resulting in the objectís constant acceleration.