A wheel with a tire mounted on it rotates at a constant rate of 2.89 times a second. A tack is stuck in the tire at a distance 39.1cm from the rotation axis. noting that for every rotation the tack travels one circumference. find the tacks tangential speed.
m/s
what is the tacks radial acceleration?
m/s^2

(A) Tangential speed will be equal to 7.09 m/sec

(B) Radial acceleration will be equal to  

Explanation:

We have given angular speed of the wheel

Radius of the track r = 39.1 cm = 0.391 m

(A) Tangential speed will be equal to , here is angular speed and r is radius

So tangential speed

So tangential speed will be equal to 7.09 m/sec

(B) Radial acceleration will be equal to

So radial acceleration will be equal to

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.