F091ALLab06

F091ALLab06 - Physics 1A Introduction ENERGY & ENERGY...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Physics 1A Fall 2009 1 Ramp A start Ramp B start finish finish Introduction In this lab you will use conservation of mechanical energy to predict the motion of objects in situations that are difficult to analyze with force concepts. _____________________________________________________________________________ Prelab Activity: 1. A skier (whose mass is 65 kg) skis down a smooth (frictionless) ski slope, as shown in the diagram (which is not drawn to scale). The skier pushes off at the top with a speed of 5.0 m/s. If we define the absolute bottom of the slope to have zero gravitational potential energy, what is the gravitational potential energy of the skier (in Joules) when she is at the top of the slope (just before she pushes off)? What is the kinetic energy of the skier (in Joules) when she reaches the absolute bottom of the slope? 2. A 250 gram mass is placed on a horizontal spring. The spring has a spring constant k = 590 (N/m) and is at its equilibrium length. a) The spring is stretched so that it is 7.5 cm longer than its equilibrium length. How much elastic potential energy (in Joules) is stored in the spring now? b) Now the spring from part a) is released, what is speed of the mass as it passes through the equilibrium point ( x = 0)? 3. You release a frictionless cart at the top of each of the 2 ramps. On Ramp B, the cart is released from rest, but on Ramp A the cart is pushed at the top so that it has some initial velocity. The ramps have the same height as each other at the starting and finishing points. One has a small bump up then down just before the end. The other has a small bump down
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/17/2012 for the course HILD 100 taught by Professor Lee during the Spring '11 term at UCLA.

Page1 / 4

F091ALLab06 - Physics 1A Introduction ENERGY & ENERGY...

This preview shows document pages 1 - 2. Sign up to view the full document.

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