16 terms

All forces on an object are equal

0 N net force

Aristotle's Forces

Natural and Violent

Constant Speed

an object moving in a straight-line path with no net force acting on it

Law of Inertia

Another name for Newton's 1st Law, applies to both objects at rest and moving objects

Weight

A measure of the force of gravity on an object

Greater Inertia

more difficult to stop or start

Mass

the amount of matter in an object

mass on Earth vs. Moon

same

weight on Earth vs Moon

more on Earth because of higher gravity

Inertia varies depending on ____.

mass

air resistance

force that opposes the motion of objects that move through the air, causes objects to fall at different rates on Earth

moon

Lower gravity and no air resistance

5N -----> and 3N <-----

2N ---->

A 15 kg book is at rest on a table. What is the weight on Earth?

147 N

The weight of a book is 150 N. What is its mass?

15 kg

the tension on each rope of a swing

half the weight of the girl