Question

A bicycle tire has a diameter of 20 inches and is revolving at a rate of 10 rpm. At t = 0, a certain point is at height 0. What is the height of the point above the ground after 20 seconds?

I need the formula for this and I'll figure out the rest c:

Answer 1

The formula is the important part.

20 seconds = 1/3 minute

10 rpm for 1/3 minute is 3 + 1/3 revolutions

Answer 2

height above ground = 20+ h inches

Answer 3

Oh okai thanks guys c:

Answer 4

You can find angle x with tkhunny's info, what's 1/3rd of a circle in degrees? That amount will equal x+90 degrees. Then use sin x = h/20.

Answer 5

the h equals 1 correct?

Answer 6

I mean does the h = the sin x?

Answer 7

sin x = h/20
so
20*sin x = h

Answer 8

ohhh okai c:

Answer 9

Did you find angle x as well?

Answer 10

Don't forget, once you find h, the height above ground = 20+ h inches

Answer 11

oh okai I didn't do that last part and yeah I found out my x value