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# Newton's 1st law

### motion

State Newton's first law Object at rest will remain at rest and an object in motion will remain in motion unless acted upon by an outside force
What is another name for Newton's first law The law of inertia
What is inertia? ability of objects to resist change
What term is used to describe the amount of matter in an object? mass
What is the difference between mass and weight? Mass is the amount of matter in an object while inertia depends upon gravity
What does inertia depend upon? the amount of mass
Does a 2 kg iron brick have twice as much inertia as a 1 kg iron brick? Twice as much mass? Yes
The law of inertia states that no force is required to maintain motion. Why, then, do you have to keep peddling your bicycle to maintain motion? to overcome friction which will eventually bring you to a stop
Forces of 10 N and 15 N in the same direction act on an object. What is the net force on the object? 25 N
If forces of 10 N and 15 N act in opposite directions on an object, what is the net force? 5 N
If a woman has a mass of 50 kg, what is her weight in newtons? 490 N
A medium-size American car has a weight of about 3000 pounds. What is its mass in kilograms? 1364 kg
If an elephant were chasing you, its enormous mass would be very threatening. But if you zigzagged, the elephant's mass would be to your advantage. Why? Its huge mass would make it difficult to change direction
When you compress a sponge, which quantity changes: mass, inertia, volume, or weight? volume
what is the equation for Newton's first law Weight = m (in kg) times g (9.8 N/kg)
Created by: william myricks