A hoop is rolling without slipping along a horizontal surface ...

[dakota nelson]

A hoop is rolling without slipping along a horizontal surface with a speed of 4.50 m/s when it starts up a ramp that makes an angle of 25.0 with the horizontal. What is the speed of the hoop after it has rolled 3.00 m up the ramp?
 
  A)
 
  2.80 m/s
 
  B)
 
  1.91 m/s
 
  C)
 
  2.06 m/s
 
  D)
 
  3.79 m/s
 
  E)
 
  8.02 m/s

Question 2

Describe the phenomenon known as diffraction.
 
  What will be an ideal response?

[zenzy]

Answer to Question 1

A

Answer to Question 2

Waves spread as they travel. When they encounter an obstacle, they bend around it somewhat and pass into the region behind it. The amount of diffraction depends on the wavelength of the wave and on the size of the obstacle.

[dakota nelson]

TY

[zenzy]

You're welcome