problem07_76

University Physics with Modern Physics with Mastering Physics (11th Edition)

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

View Full Document Right Arrow Icon
7.76: The kinetic energy K after moving up the ramp the distance s will be the energy initially stored in the spring, plus the (negative) work done by gravity and friction, or . ) cos (sin 2 1 k 2 s mg kx K α μ + - = Minimizing the speed is equivalent to minimizing K , and differentiating the above expression with respect to
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: and setting = d K d gives ), sin (cos k--= mgs or k 1 tan = , = k 1 arctan . Pushing the box straight up ) 90 ( = maximizes the vertical displacement h , but not sin h s = ....
View Full Document

Ask a homework question - tutors are online