ch08-p121 - 121. We use Eq. 8-20. (a) The force at x = 2.0...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
121. We use Eq. 8-20. (a) The force at x = 2.0 m is (17.5 J) ( 2.8 J) 4.9 N. 4.0 m 1.0 m dU F dx −− =− ≈− = (b) The force points in the + x direction (but there is some uncertainty in reading the graph which makes the last digit not very significant). (c) The total mechanical energy at x = 2.0 m is Em v U =+ = 1 2 1 2 20 15 77 55 22 (.) ( .) . . in SI units (Joules). Again, there is some uncertainty in reading the graph which makes the last digit not very significant. At that level (–5.5 J) on the graph, we find two points where the potential energy curve has that value — at
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

Ask a homework question - tutors are online