Posts by Anderson
Total # Posts: 14
The Formula for this Problem is T= 2ð*radical (L/g). After solving for L, the new for Formula becomes: g(T^2/4ð^2) = L ... Now you Plug in your Numbers. remember you looking for the difference. It should be Something like this: (9.8*(1.08+0.31)^2)/(4ð^2)-(9.8*(1.08...
December 1, 2011
physics (fluid mechanics: buoyant forces)
A frog in a hemispherical pod just floats without sinking into a pond with density 1.35 g/cm^3. If the pod has radius 6 cm and negligible mass, what is the mass of the frog? wouldn't one need the thickness of the pad? And what has the density given? The pond water, or the ...
May 2, 2007
Physics (torque, if possible)
An electric motor turns a flywheel through a drive belt that joins a pulley on the motor and a pulley that is rigidly attached to the flywheel. The flywheel is a solid disk with a mass of 80.0kg and a dimaeter of 1.25m. It turns on a frictionless axle. Its pulley has much ...
April 18, 2007
A tower clock has an hour hand 2.70 m long with a mass of 60.o kg, and a minute hand 4.50 m long with a mass of 100 kg. Calculate the total rotational kinetic energy of the two hands about the axis of rotation. Sol: I know that Kr = 1/2Iw^2 or moment of inertia * omega squared...
April 18, 2007
A bicycle starts at the origin of a circular track that has a circumference of 126 m and travels at a constant speed a distance s = 38.0 m in a time t = 12s. a)what is the angular displacement (in rad) of the bicycle from its starting position? r=20.1 so theta or angular ...
April 16, 2007