Name of Investigation - 1st Law of Motion - Inertia

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We know that gravity accelerates all objects at the same rate. Gravity pulls on you and me and the chair and your car with the same RATE OF FORCE. So, gravity (force) will pull on both the bowling ball and the soccer ball with the same amount of (equal) force. So, both balls will accelerate at the same speed. ANSWER: The balls will hit at the same time. Surprise! Go outside and hold a full bottle of water and a half-full bottle of water from the top of the slide. Drop both bottles at the same time. What happens? 1. Explain why this happened. ____________________________________________________________________ So, if the 2 nd Law of Motion is true, why don’t a feather and a soccer ball hit at the same time? Because of Air Resistance. The feather is so light that air helps the feather to resist the force of gravity.
B. Acceleration is DIRECTLY proportional to the force. If you push twice as hard, it accelerates twice as much. If you are pushing on an object causing it to accelerate and then you push it three times harder, then the object will accelerate three times faster. *Push my chair that has wheels on it and observe the movement. *Push my chair twice as hard as you did before and observe the movement. WHY did the chair move further the 2 nd time? Now take out ONE of the black balls in the baggie. Push it gently and watch how far it goes. Then push THE SAME BALL harder and watch how far it goes. Write down what happened and WHY it happened. C. Acceleration is INVERSELY proportional to the mass of the object. If it has twice the mass, it accelerates half as much. If you push equally on two objects and one object has 5 times more MASS than the other, the heavier object will accelerate 1/5 the acceleration of the other. Now take both black balls out of the baggie. One ball is heavy and one ball is light. Put a ball in each hand and at the same time, roll them out of your hands. Which ball went the farthest distance? _________________ Which ball went the shortest distance? _________________ Why?
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Name of Investigation - 1st Law of Motion - Inertia

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