# Bryant Young,Newton's first law

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#### Storyboard Description

Newton's first law states that every object will remain at rest or in motion in a unless compelled to change its state by a compelling force. This is normally taken as the definition of inertia. The key point here is that if there is no net force acting on an object (if all the external forces cancel each other out) then the object will maintain a constant velocity. If that velocity is zero, then the object remains at rest. If an external force is applied, the velocity will change because of the force.

#### Storyboard Text

• Hi there!Today, we're going to be talking about Newton's 1st law of motion.
• ﻿
• staying still
• constantly moving﻿
• Newton's 1st law states that if an object is at rest or in motion, it will stay in that form unless an opposing forces resists against it.﻿
• For example, lets your an astronaut, when you go to space, there's no air resistance or gravity so you would stay in that spot or keep moving constantly forever until an external force interrupts you.
• Adding on to earlier, force can also be added to an object in order for it to be in motion. For instance, in the next scene a soccer player is applying for to the soccerball.
• The soccer player applying the force is causing the ball to go into motion. Opposing the force, the grass, the gravity, and the air resistance are showing an external force that will cause the ball to slow down and come to a complete stop. If there was no type of resistance against the soccer ball, it would just keep on rolling and never stop.
• Well, that was Newton's first law of motion. Hope you enjoyed it and thanks for staying. Bye!
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