Unformatted text preview: to the mass. 3 rd : action / reaction– forces equal in magn. and opposite in direction. Torque=rotational force ω=ang vel. θ=revolutions 2πrad per rev 2πr=circumf v=2πr/T T:time int α= ω /t v=r ω a=r α ang disp constant speed: Δ θ = ω Δ t ang disp constant accel: Δ θ= ω i Δt + 1/2 α Δ t 2 change in vel at constant accel: Δ ω =α Δ t CCW speeding up: w>0 a>0, CCW slow: w>0 a<0, CW slow(w=neg, a=pos): w<0 a>0, CW speed(w=neg,a=neg): w<0 a<0. Wrench prob: find r and F τ=rF τ=rFcosθ τm 2 =rF 2 τm 1 =rT 1 τm2=rT2 I pully =1/2MR 2 (given) τ=r(T 2T 1 )=1/2MR 2 α Ruler question (static equil): F=0 and τ=0 Nm 1 gmg1/2m 1 g=0...
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 Fall '08
 Staff
 Force, Friction, Mass, disp constant accel, T=m2a Centripetal accel

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