20-kinetic energy and work 3

20-kinetic energy and work 3 - PHYS 211 Chapter 7 Kinetic...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: PHYS 211 3/6/09 Chapter 7 Kinetic Energy and Work Constant Forces Variable Force (Spring) Power Exam II Results !"!! !"$! !"%! !"&! !"’! ("!! ("$! ("%! ( ) (* (+ $, *( *) %* %+ ,, &( &) )* )+ ’, +( +) (!* (!+ ((, ($( ($) (** (*+ (%, (,( (,) (&* (&+ (), (’( (’) (+* (++-$-( Test 2 Average = 71 Q4 Excluded Score=points/40 Score Summary Kinetic Energy K = 1 2 mv 2 Work W = Δ K = F ⋅ d Work transfers energy - sign indicates direction of transfer Constant Force W = F ( r ) ⋅ d r r i r f ∫ = F ( x ) dx + x i x f ∫ F ( y ) dy + y i y f ∫ F ( z ) dz z i z f ∫ W s = 1 2 k x 1 2 − x 2 2 ( ) Spring Force F = − k ( x − x ) = − k d Dropping Two balls of equal size are dropped from the same height from the roof of a building. One ball has twice the mass of the other. When the balls reach the ground, how do the kinetic energies of the two balls compare?...
View Full Document

Page1 / 13

20-kinetic energy and work 3 - PHYS 211 Chapter 7 Kinetic...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online