This preview shows page 1. Sign up to view the full content.
85. (a) Resolving the gravitational force into components and applying Newton’s second
law (as well as Eq. 62), we find
F
machine
–
mg
sin
θ
–
μ
k
mg
cos
=
ma
.
In the situation described in the problem, we have
a =
0, so
This is the end of the preview. Sign up
to
access the rest of the document.
Unformatted text preview: F machine = mg sin θ + k mg cos = 372 N. Thus, the work done by the machine is F machine d = 744 J = 7.4 × 10 2 J. (b) The thermal energy generated is k mg cos d = 240 J = 2.4 × 10 2 J....
View
Full
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.
 Spring '08
 Any
 Physics, Force

Click to edit the document details