According to Wired magazine, a fidget spinner has a radius of 3.7 cm and can reach a top rotational speed of 140 rads/sec. What is the Period of the spinner at that speed and what is the tangential velocity at the edge?

Explanation:

The period is the time it takes for the spinner to rotate one revolution, or 2π radians.

T = 2π / ω

T = (2π rad) / (140 rad/s)

T = 0.0449 s

The tangential velocity is the product of the angular velocity and the radius.

v = ωr

v = (140 rad/s) (3.7 cm)

v = 518 cm/s

wavelength variability is the right one

carla slowed down in the beginning of her trip, stopped, and then sped up