physics195

# Physics195 - 1 Newton's Laws of Motion or you can't push on a rope Force any agent of change A force is an interaction among two objects A force

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2 Newton's Laws of Motion ( or, you can't push on a rope) Force: any agent of change A force is an interaction among two objects. A force can be a push or a pull. Some scientists before Newton believed that some force was required to keep an object moving.

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3 No force is required to keep a body moving. However, a force is needed to: *start it moving, or *slow it down or speed it up Two types of forces: 1. contact 2. action-at-a-distance
4 Newton's 1 st Law of Motion A body at rest will remain at rest, and a body moving in a straight line at constant speed will continue to do so,… unless acted upon by some net external force.

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5 If you do try to change an object’s velocity, it offers some resistance to a change in its motion. This resistance is called _________.
Newton’s 1 st Law is often referred to as the “Law of Inertia”: - all bodies offer some resistance to a change in their motion, this resistance is called Inertia . An object’s inertia is measured

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## This note was uploaded on 09/09/2011 for the course PHYS 195 taught by Professor Staff during the Spring '11 term at Mesa CC.

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Physics195 - 1 Newton's Laws of Motion or you can't push on a rope Force any agent of change A force is an interaction among two objects A force

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