Question

Is it possible to convert rpm into kmph? How?

Answer 1

The radius of the wheel has to be known for that

Answer 2

let's say it's just 30 rpm. Is it possible to make it kmph?

Answer 3

you cant though? isnt that angular velocity

Answer 4

what does that mean?

Answer 5

Assuming you know the radius is r

And your value is n rpm

n rpm means an angular distance of 2pin radians per minute
hence pi(n)/30 rad/s
now x = r (theta)
so v = r x w
Hence
v= r x pi(n)/30

Answer 6

wait. please do it slowly!!

Answer 7

You will need to know the radius.

Answer 8

Let's say a radius is given to be 10 cm. What then?

Answer 9

Hang on, I just did this stuff today, need to pull up some formulas.

Answer 10

okay

Answer 11

V^2/r=w^2*r

Answer 12

where V is the velocity, w is the angular acceleration and r is the radius.

Answer 13

So V^2=w^2*r^2
V=w*r

Answer 14

Convert rpms to rphrs

Answer 15

So to convert ang vel to linear velocity u need to multiply with the radius

Answer 16

what are v, r and w?

Answer 17

Agent47: He needs to multiply with 2pi

Answer 18

well, I guess, I derived it from this formula:
a_c=V^2/r=w^2r

Answer 19

a_c = centripetal acceleration
r= radius
V=linear velocity
w=angular velocity.

Answer 20

v: Linear velocity, measured in kmph
r:radius
w: angular velocity

Answer 21

angular velocity is already in rotations per time unit, so I don't think the 2pi is necessary

Answer 22

But u need to convert to SI unit, which is rad/s

Answer 23

oh yea, good point

Answer 24

Only then can u get to kmph

Answer 25

uh so what's the formula?

Answer 26

See
Velocity(kmph) = r x Angular velocity(rpm)

Answer 27

Basic formula is this..now u need conversion

Answer 28

rpm is angular velocity?

Answer 29

ok, not using any physics...

d=2pi*r, so in 1 minute, he travels that much distance