H  H  Work and Energy  




Chapters
16 Summary 


How can we harness the vast store of energy in the wideopen space between the Stars and Galaxies?  
Mass?
Energy? Brian Greene, The Fabric of the Universe 
A Nobel Prize
Winning Physicist tells us about mass. 

This rapidly moving surfer has kinetic energy, or energy of motion, because the wave, in accelerating him to his present speed, has done work on him. This chapter discusses the relationship between work and kinetic energy. 

Work  The Transformation of energy into and out of a system  
Work = The product of the component of the Force in the direction of the displacement Work (Joules) = Force (N) x Distance (m) 

What
if there are more forces acting on the sled? 



What is the final speed of the downhill skier if his mass = 58 kg, his initial velocity = 3.6 m/s, the frictional force = 71N on the skiis and the distance traveled down the slope s = 57m? 

Work done by a Force that changes. . .  
Mechanical Universe click below 

Using
Energy Methods instead of the motion equations 

Animated Problem 101 
