Question

An object moves along a circular path with radius 10 inches and makes 5 revolutions in 1 minute. What is the linear velocity, in inches per minute, of a point on the edge of the wheel?

10π

20π

50π

100π

Answer 1

D. 100π

Explanation:

did it on edge

Answer 2

100π

Explanation:

step 1

Find the circumference

The circumference is equal to

`C=2\pi r`

we have

`r=10\ in`

substitute

`C=2\pi (10)`

`C=20\pi\ in`

step 2

we know that

An object moves along a circular path and makes 5 revolutions in 1 minute

Remember that

`1\ rev=2\pi r` ----> circumference of the circle

therefore

`5\ rev=5(20\pi)=100\pi(in)/(minute)`