Question

A motor running at 4500 RPM, revolutions per minute, is actually revolving at how many revolutions per second?

Answer 1

Motor run in 1 second = 75 revolution.

Explanation:

Given : A motor running at 4500 RPM, revolutions per minute,

To find : how many revolutions per second.

Solution : We have given

Motor run in minute = 4500 revolution.

1 minute = 60 second .

Then ,

Motor run in 60 second = 4500 revolution.

Motor run in 1 second =
`(4500)/(60)` revolution.

Motor run in 1 second =
`(450)/(6)` revolution.

Motor run in 1 second = 75 revolution.

Therefore, Motor run in 1 second = 75 revolution.

Answer 2

A motor running at 75 revolutions per second.

Explanation:

Given statement: A motor running at 4500 RPM, revolutions per minute.

⇒ In one minute , a motor running at 4500 revolutions.

Use conversion:

`1 min = 60 sec`

We have to calculate how many revolutions per second.

in 60 sec , a motor running at 4500 revolutions

then,

in 1 sec , a motor running at
`(4500)/(60) = 75` revolutions.

Therefore, a motor running at 75 RPS, revolution per second.