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## Homework Statement

A 1kg engine rotates at 1 rad/sec about a point on a 3meter wire. The engine produces an acceleration of 1 rad/sec^2 and is fird for 2 minutes.

a) What is the ω at the end of 2 minutes?

b) what's the tension in the wire at the end of 2 min.?

c) how far will the engine travel in meters while it's accelerating?

d) what's the Kinetic Energy of the engine after it shuts down?

## Homework Equations

a)ω=radius/Time or ω= θ/Time

B) ???

c) S=rθ

θ= ωi(T)+1/2αT^2

d) KE=1/2(Ι)(angluar acceleration)(T)^2

Ι=1/2mr^2

## The Attempt at a Solution

a) ω=radius/Time

ω=3/120= 0.25 rad/sec

b)???

c) ???

d) Ι=1/2mr^2

Ι=1/2(1)(3)^2= 3

KE=1/2(Ι)(angluar acceleration)(T)^2

KE=1/2(3)(1)(120)^2

KE=21600 J

need help with b&c and with corroborating a&d!

thanks!!