A fly wheel of mass 500kg and radius 1m makes 500 revs/min. Assuming the mass is concentrated along the rim, calculate the energy of the rim

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?