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Physics Chp 10 Sec 3

Mr. Radeke pages 349-352

inertia Inertia is the tendency of an object to resist a change in motion.
How is mass related to motion? Mass is directly related to inertia. Greater mass causes greater inertia.
What are two ways to increase force? increase force or decrease mass
What does Newton's first law of motion state? Unless acted upon by an unbalanced force, an object at rest will stay at rest and an object in motion will continue moving at a constant velocity.
Why is Newton's first law of motion sometimes called the law of inertia? Inertia is a measure of an object's tendency to resist a change in motion, a statement that has the same meaning as Newton's first law of motion.
Use what you know about inertia to explain why you feel pressed back into the seat of a car when it accelerates. Because of your inertia, your body has a tendency to remain in place. The moving car causes you to accelerate by exerting force on your back.
State Newton's second law of motion in your own words. Greater force increases acceleration, greater mass decrease acceleration; Force/Mass
How could you keep an object's acceleration the same if the force acting on the object doubled? by doubling the objects mass
Using what you know about Newton's second law, explain why a car with a large mass might use more fuel than a car with a smaller mass. Assume both cars drive the same distance. A greater force is required to accelerate a more massive car, therefore, more engine power is required and more fuel is needed to produce that power.
Created by: Tom Radeke