Recent content by df102015

Thanks! I got the right answer!

Okay i think i have it... 1/2 m Vinitial^2 + 1/2 (2/3 m R^2) [(Vinitial / R)^2] + m g h = 1/2 m Vfinal^2 + 1/2 (2/3 m R^2) [(Vfinal / R)^2] Is this correct?

But how do i set the equations up so that the variables i need cancel and everything else remains?

Okay so would i use the equation that i have already set up? ... KE = 1/2 m v^2 + 1/2 (2/3 m R^2) [(v / R)^2] And would i add PE (mgh) and set equal to ME?

Energy, so would i set KE=PE ?

Homework Statement The image above shows a basketball (a thin spherical shell I=⅔ mR^2) rolling don an incline of height 8.4 m. If the ball is already rolling with an initial linear speed of 3.0 m/s then what will be the final linear speed when it rolls off the incline? Homework Equations I =...

Thanks so much! You have no idea how much i appreciate it!

is the equation i am looking for α = a/R ?

Homework Statement [/B] A mass of 6.1 kg tied to a string is wrapped around a disk as shown. If the disk has a mass of 8.2 kg and a radius of 2.3 m, how fast will the disk be rotating when the weight has fallen 7.4 m and was released from rest? Homework Equations Θ = S/R = x/R Θ = 0.5 α t^2 τ...

i am still confused as to what two equations these are, if you could provide them for me or hint at what they would be i would greatly appreciate it. I am unsure of what s0 would be, i understand that theta substitutes for s, but it couldn't be for both sides. Is 2pi x 9.4 supposed to be s?

Homework Statement If a bike wheel rotates 9.4 times while slowing down to a stop from an initial angular velocity of 8.1 rad/s, what is the magnitude of the angular acceleration in rad/s/s Homework Equations α = at / r α = ω / t α = Θ / t^2 ω = Θ / t ω = v / r Θ = ω t + 0.5 α t^2 v final = v...

fixed it

Homework Statement A.) For the graph above what is the angular displacement during the 4 seconds of motion? B.) For the graph above what is the angular acceleration from t=2 to t=4? Homework Equations α = at / r α = ω / t α = Θ / t^2 ω = Θ / t ω = v / r Θ = ω t + 0.5 α t^2 The Attempt at a...

Yes and so would i use Θ = ω t + 0.5 α t^2 ? and ω would be the angular velocity of the wheel before deceleration?

the angular velocity of the wheel?