Answered: A skier of 50 kg starts from rest on a…

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter8: Potential Energy And Conservation Of Energy

Section: Chapter Questions

Problem 39P: A sled of mass 70 kg starts from rest and slides down a 10 incline 80 m long. It then travels for 20...

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Question

A skier of 50 kg starts from rest on a hill at a point 40.0 m above the ground below. What is their speed at the bottom of the hill in m/s if the snow is assumed to be frictionless? Use g = 9.8 m/s².

Expert Solution

Step 1

Given :

mass of the skier, $= 50 K g$

Initial height of the skier, $h = 40 m$

gravitational acceleration, $g = 9.8 m / s^{2}$

Determine :

the velocity of the skier at the bottom of the hill if the snow is assumed friction less.

Concept :

Total energy of a system is always conserved or constant but it can change it's form from one to another.

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