A 1030 kg roller coaster goes over hill and through a valley, then upside down on a loop. The radius of the first hill circular path is 8 meters and the velocity over this hill is 3m/s. The radius of the valley is 18 meters. The velocity at the bottom of the valley is 9m/s. What is the centripetal force at the top of the first hill? what is the normal force at the bottom of the valley? if the magnitude of normal force at the top of the hill 3200 what is the velocity? what is the total mechanical energy?

The act of moving from one place to another. a. locomotor b. aerobic c. stationary d. static

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)