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Science Project Newtons Laws
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Of course, Michelle, let's go outside & bring your brother Peter out too.
Hey Mom, can you help me with my homework? It's on Newtons 1st and 2nd laws.
So Newton's 1st law or the Law of Inertia states that an object will stay in motion or stay still unless changed by an outward force.
An object's Inertia is it's a ability to remain unchanged.
Let's experiment with 2 rocks.
Objects with more mass tend to have more inertia.
Both of you try to carry your rock. As you can see Peter is able to move his rock and Michelle isn't able to.
Parker's rock doesn't have enough inertia to stay in the same spot.
Michelle's rock has a lot more inertia because her rock is harder to carry.
Also in this case you guys are the outward force.
Friction is a force that resists motion on a surface.
See when I kick this ball it stays in motion and in the same speed, until friction acts upon it.
The Ball's inertia isn't enough to resist the friction of the ground..
Our last example is here. This ball is at rest.
When I kick it, the ball is no longer at rest and is now in motion.
The inertia of the ball couldn't wasn't strong enough to resist the force from my foot.
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