A point on the rim of a 0.30-m-radius rotating ..


by debo
Tags: 030mradius, point, rotating
debo
debo is offline
#1
Dec8-08, 07:11 AM
P: 2
A point on the rim of a 0.30-m-radius rotating wheel has a tangential speed of 4.0 m/s. What is the tangential speed of a point 0.20 m from the center of the same wheel?

a. 1.0 m/s
b. 1.3 m/s
c. 2.7 m/s
d. 8.0 m/s

i have been trying to do this for hours now.somebody please help
Phys.Org News Partner Science news on Phys.org
SensaBubble: It's a bubble, but not as we know it (w/ video)
The hemihelix: Scientists discover a new shape using rubber bands (w/ video)
Microbes provide insights into evolution of human language
CompuChip
CompuChip is online now
#2
Dec8-08, 07:13 AM
Sci Advisor
HW Helper
P: 4,301
What formula do you know that relates tangential speed to radius?
debo
debo is offline
#3
Dec8-08, 07:19 AM
P: 2
can anyone help me?

CompuChip
CompuChip is online now
#4
Dec8-08, 07:28 AM
Sci Advisor
HW Helper
P: 4,301

A point on the rim of a 0.30-m-radius rotating ..


Quote Quote by CompuChip View Post
What formula do you know that relates tangential speed to radius?
Please read this first. Then, you might want to answer that question. The solution immediately follows (i.e. I cannot make it any easier for you without giving the answer).


Register to reply

Related Discussions
Detecting the point of collision between a rotating point and a rotating line. General Math 2
Rotating a Point in Space, Function of time General Math 5
angular velocity and period of a disc rotating about point on circumference Introductory Physics Homework 2
Reducing radius of rotating object General Physics 5