A wheel with a 21-inch diameter is turning at the rate of 58 revolutions per minute. To the nearest inch, what is the velocity of a point on the rim in inches/minutes?
3879 inches/minutes
is my answer correct??
10.5 in * 58 rev/min * 2 pi radians/rev = I get 3826 in/min
By the way, earlier I notice you were looking for a calculator:
http://www.mathsisfun.com/scientific-calculator.html
yes,..the guy was teaching me how to do this problem
[pi,3pi/2];tan s=1
can you help..i need to use this link to figure out this problem..please guide me through:)
We are in quadrant 3
so add 180 degrees or pi radians to answer whatever we get first
on calculator
click radians on upper right
type in the number 1
click atan
answer .785 ......
click +
click Pi
click =
get 3.926...... radians
so..5pi/4
thank you very very much..i just have one LAST problem i need help with
A pulley of radius 11cm rotates 5 times in 64 seconds. Find the angular velocity of the pulley.
thnks again
i think you have to use the formula
w=pi/t
maybe..
Yes, 5 pi/4
You could have seen that from the start because you probably know that the tan of 45 deg (Pi/4 radians) is 1 and pi/4 + pi = 5 pi/4
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radius has noting to do with this
5 * 2 pi radians / 64 s
= (10/64) pi rad/s = .49 rad/s
.49 I mean
so 5pi/32
thank you soo much!!!!
To calculate the velocity of a point on the rim of a wheel, you need to find the circumference of the wheel and multiply it by the number of revolutions per minute.
First, let's calculate the circumference of the wheel using the formula:
Circumference = π * Diameter
Given that the diameter is 21 inches, we can substitute the value into the formula:
Circumference = π * 21 inches
Now, let's calculate the value of π. Since we need to round our final answer to the nearest inch, let's use π as 3:
Circumference = 3 * 21 inches
Circumference = 63 inches
Next, we multiply the circumference by the number of revolutions per minute:
Velocity = Circumference * Revolutions per minute
Velocity = 63 inches * 58 revolutions per minute
Velocity = 3654 inches per minute
Therefore, the velocity of a point on the rim of the wheel is approximately 3654 inches/minute, not 3879 inches/minute. It seems like there was a mistake in your calculation.