# engineering mechanics

posted by .

An exercise bicycle's flywheel is 30cm in diameter and 2.5 cm thick and is constructed from steel (density=7850 kg m3) its moment of inertia is 0.156 kg m2 about its axis of rotation
a) calculate the mass of the flywheel
b) calculate the flywheel's radius of gyration
c) whilst exercising a man applies a constant moment of 10.0Nm to the flywheel. Starting from rest the flywheel reaches an angular velocity of 12.0 rad s-1 after exactly 1 minute. Calculate the flywheel's angular acceleration, the number of revolutions the flywheel makes and the friction moment applied to the flywheel

• engineering mechanics -

A body that weighs 50 lbs is placed in contact with an inclined plane surface. The coefficient of friction
between the surfaces in contact is 0.25. If the angle between the inclined surface and a horizontal reference
plane is 28°, what would be the angle of repose for the body and the material used for the surface?

• engineering mechanics -

14 degrees