Recent content by ba726

Homework Statement A car is designed to get its energy from a rotating flywheel with a radius of 1.85 m and a mass of 678 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 3610 rev/min. Find the kinetic energy stored in the...

Homework Statement An electric motor can accelerate a Ferris wheel of moment of inertia 19200kgm2 from rest to 9.11 rev/min in 10.7s. When the motor is turned off, friction causes the wheel to slow down from 9.11 rev/min to 7.36 rev/min in 9.55s. Determine the torque generated by the motor to...

can the percentage error for final total momentum be negative in an elastic collision? It doesn't have absolute value in the equation given and I get a negative number, p(final) - p(initial)/p(initial) x 100 though small -0.528