First Law of Motion

An object at rest will remain at rest and an object in motion will remain in motion unless acted upon by an outside force.


What forces cause an object to move or to stop moving?

What is Net Force?

A thrown ball moves in a horizontal direction. The force of gravity pulls it downward toward the ground. This is called Projectile Motion.

One Newton is the amount of force needed to cause a 1-lg mass to accelerate at a rate of 1 meter per second for each second of motion.

N = 1 kg X (1m/Sec2)

An object at rest is said to have 0 net force. An object that has force applied to it will move in the direction of the force. Recall that velocity is the speed and direction of an object.


Download the lesson inquiry

Lesson Inquiry

Review the following information and take the quiz.

Newton's Laws of Motion



Read through this exercise and list your predictions on the lesson inquiry.

Newton's 1st law in action --

Place a toy car on your desk. Did the car move?

Give the car slight push from behind. Did the car fall off the edge of table. What changed?

If I place a softball and a baseball on the edge of your desk. Which object will hit the ground first? What do you think caused the results?

Why do dinner plates stay in place when a magician pulls a table cloth from under the stack of plates?

List the types of friction on the lesson inquiry.

Share your examples of the types of friction.

Done Early...

Find and describe the types of material that reduce friction on the space shuttle. Space Shuttle

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Last modified: 5/30/2012