10-04-ConservationOfEnergy

# 10-04-ConservationOfEnergy - 1 Potential Energy of a Spring...

This preview shows pages 1–3. Sign up to view the full content.

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 Potential Energy of a Spring F applied kx The work done by the applied force is stored in the spring in 2 2 1 kx Area Work kx x 2 2 1 kx PE spring W force is stored in the spring in the form of potential energy: Textbook Page 233, Example 8-8, Spring Time A 1.70-kg block slides on a horizontal, frictionless surface until it encounters a spring with a spring constant of 955 N/m. The block comes to a momentary rest after compressing the spring a distance of 4.60 cm. Find the initial speed of the block. (Ignore air resistance and any energy lost when the block initially contacts the spring.) 2 2 1 kx PE spring Conservation of mechanical energy i i f f PE KE PE KE 2 2 2 2 2 1 2 1 2 1 2 1 i i f f kx mv kx mv Normal force (nonconservative) does no work . W nc = 0 v f = 0, x i = 0 v i = ? 2 2 2 2 ) )( / 955 ( ) 7 . 1 ( ) 046 . )( / 955 ( ) / )( 7 . 1 ( m s N v kg m m N s m kg i v f = 0, s m v i / 09 . 1 x f =- 0.046m, x i = 0 x f =- 0.046m, 2 Total mechanical energy S i 2 energ potentia nal Gravitatio T l ti 2 mechanical Total 2...
View Full Document

{[ snackBarMessage ]}

### Page1 / 4

10-04-ConservationOfEnergy - 1 Potential Energy of a Spring...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online