- #1

Steelers72

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## Homework Statement

Dario, a prep cook at an Italian restaurant, spins a salad spinner 20.0 times in 5.00 seconds and then stops spinning it. The salad spinner rotates 6.00 more times before it comes to rest. Assume that the spinner slows down with constant angular acceleration.

What is the angular acceleration of the salad spinner as it slows down? Express your answer numerically in radians per second per second.

2. Homework Equations

2. Homework Equations

ω2f = ω20 + 2α(θ)

## The Attempt at a Solution

ω = θ / t

ω = 20 * 2 * π / 5.00

ω = 8π

ω = 25.13272 radians/s

now I can solve for α using a kinematic equation:

ω2f = ω20 + 2α(θ)

02 = 25.132722 + 2 * α * (2 * π * 6.00)

0 = 631.6536 + 75.39816α

75.39816α = -631.6536

α = -8.37757 radians/s2

apparently This answer is wrong...where did I go wrong?