Recent content by PrettyLights

Homework Statement A pair of die-hard sports fans decide to ride their motorcycle to the local game, equipped with identical air horns. While stuck at a stoplight, one rider blasts his horn, emmiting a coninuous sound at a frequency of 10 rads/sec. The second rider waits just the right amount...

Homework Statement A sinusoidal transverse wave traveling on a string is described at t=2.0s by y(x)=0.1sin(4πx+(33π/40) and at x=1.0m by y(t)=0.1sin((17π/4)+4πt) a. What is the wavelength and the amplitude? b. What is the frequency (Hz) and direction of propagation? c. What is the speed? d...

Okay, so if I start with the equations for Torque this is where it takes me: alpha=T/I = (F x R)/(2/5)MR^2 = Mguk x R/ (2/5)Mr^2 = 5guk/2R This seems right to me because, as you said, the friction is the external force causing the torque. Thank you!

Homework Statement A bowling ball is released with speed V and no rotational kinetic energy. After a period of sliding and rotating, the ball enters pure rotational motion. The coefficient of friction between the ball and the ground while sliding is Uk. a. Show that the rotational acceleration...

Gotcha- so, alpha=4/mR and (4/mR)x10= 40/mR Thank you!

So, I can relate the moment of inertia to torque through the following: T= R x F= 4 x R/2 = 2R I= 1/2mR^2 So, since T=I x alpha --> 2R=1/2mR^2 x alpha Is this in the right direction? I'm not exactly sure how to get to velocity from here. Should I isolate for alpha and use one of the rotational...

Homework Statement A small gear with mass m and radius r rotate around a central axis. A force is applied to an interior hub at a radial distance r/2 from the axis. A. If a force of 4N is applied for 10s, what is the angular velocity of the small gear, assuming it starts at rest? B. Once it...