Linear speed and reaction forces

[aneima6]

Just checking these other problems

1)Bicycle has wheels with circumference of 2m. What is the linear speed of the bicycle when the wehels rotate at 1 rev/sec.
2m/s

2) A 10,000N vehicle is stalled 1/4 the way across a bridge. What are the two additional recation forces that are supplied at the supprot of both ends of the bridge?
2,500 and 7,5000N

 

[Spectre5]

You must change the 1 rev/sec into rad per sec

1 rev = 2*pi rad

 

[Spectre5]

The second one looks good, but I think you accidentally wrote an extra zero on the 7,500 N :)

 

[aneima6]

alright

V= R * angular speed?

Radius:
C=pi*d
2meters=3.14*d
.6366=d
d=2r
.6366=2r
Radius=.318meters

angular speed= 6.283185308 radians * ? is it 2meters?

 

[Doc Al]

You must change the 1 rev/sec into rad per sec

1 rev = 2*pi rad

The cirumference is given, not the radius. So 2m/s is correct.

 

[Spectre5]

oh, didn't pay close enough attention...sorry for any confusion aneima6!