Log In Start studying!
Answers without the blur. Sign up and see all textbooks for free! Illustration

Q. 48

Expert-verified
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 258

Answers without the blur.

Just sign up for free and you're in.

Illustration

Short Answer

Sam, whose mass is , straps on his skis and starts down a -m-high, frictionless slope. A strong headwind exerts a horizontal force of N on him as he skies. Use work and energy to find Sam’s speed at the bottom.

Sam's speed at the bottom of the slope is

See the step by step solution

Step by Step Solution

Step 1: Given information

Sam, whose mass is straps on his skis and starts down a high, frictionless slope. A strong head wind exerts a horizontal force of on him as he skies.

Step 2:Explnation

Potential energy of a mass at height h is taken as mgh. KE of an object moving with velocity

The component along the slope of the wind force acting on Sam is

Work done by the wind on Sam is

The KE of Sam at the bottom is

The other component (component perpendicular to the slope) of the wind force does no work as the friction between the skis and slope is zero.

Most popular questions for Physics Textbooks

Icon

Want to see more solutions like these?

Sign up for free to discover our expert answers
Get Started - It’s free

Recommended explanations on Physics Textbooks

94% of StudySmarter users get better grades.

Sign up for free
94% of StudySmarter users get better grades.