Recent content by 4t0mic

Or maybe the question is... how to convert revolutions (r) into SI units?

I think you should look up relevant equations, like how work done by a conservative force F will be W = -ΔU where ΔU is the change in the potential energy. So W = Fd (force*distance) or W = Fdcosθ...

Hello Tiny Tim. Oh, I see. So with the constant acceleration equation: ωf² = ωi² + 2αθ I get: α = ωf² - ωi² / 2θ Giving me: τ = Iα τ = I (ωf² - ωi² / 2θ) Given I = 4.9x10^-4 kg*m² (my answer from part A) and 730 rpm*(1m/60s)=12.1667rps τ = (4.9x10^-4 kg*m²)([12.1667rps]² - 0 / 2*0.25 rev) =...

Homework Statement A 103 g Frisbee is 16 cm in diameter and has about half its mass spread uniformly in a disk and the other half concentrated in the rim. With a quarter-turn flick of the wrist, a student sets the Frisbee rotating at 730 rpm. a) What is the rotational inertia of the...

Ooh, so I took a break for a bit and I finally understand what you mean about the cross product. It all makes sense. I just had to redraw my diagram and draw the Force (mg) from the wheel but then draw the tangent line to the wheel where the Force is coming from. So it's torque = rFcos(theta).

Thanks for the reply. But I am using the right equation, right? So the F part in the equation is where I'm doing it wrong...

Homework Statement You have your bicycle upside-down for repairs. The front wheel is free to rotate and is perfectly balanced except for the 16 g valve stem. If the valve stem is 34 cm from the rotation axis and is located 32 degrees below the horizontal, what is the resulting torque about the...