In a circus performance, a large 4.6 kg hoop of radius 5.7 m rolls without slipping. If the hoop is given an angular speed of 2 rad/s while rolling on the horizontal and is allowed to roll up a ramp inclined at 17 ◦ with the horizontal, how far (measured along the salako (ts37928) – Rotational Energy/Momentum – irons – (007) 2 incline) does the hoop roll? The acceleration of gravity is 9.8 m/s 2 .

1.   what is light?

light is an electromagnetic wave visible to the human eye. 

2. what is a reflection?

the rebounding of a light ray when it hits a mirror.

3. what is the incident ray?

contacts the surface of an object.

4. what is the reflected ray?

bounces off a reflective surface.

5. what is the normal ray?

perpendicular to the surface of a mirror.

6. what is the angle of incidence?

an angle formed by the incident ray and the normal.

7. what is the angle of reflection?

an angle formed by the reflected ray and the normal.

8. what is refraction?

(bending.)

9. what is a converging lens?

bring together light rays that pass through.

10. what is a diverging lens?

spreads out light passing through.

11. focal point?

the real point where the refracted rays meet when the incident rays run parallel.

i copy pasted btw from an website..