IncorrectQuestion 1

0 / 25 pts

What is the kinetic energy of a 125.2 cm thin uniform rod with a mass of 454.6 g that is rotating about its center at 4.04 rad/s? Give your answer in Joules.

IncorrectQuestion 2

0 / 25 pts

To drive a typical car at 40 mph on a level road for one hour requires about 3.2 10^7 J of energy. Suppose we tried to store this much energy in a spinning, solid, uniform, cylindrical flywheel. A large flywheel cannot be spun too fast or it will fracture. If we used a flywheel of diameter 0.737 m and mass 303.3 kg, what angular speed would be required to store 3.2 10^7 J? Give your answer in rad/s.

IncorrectQuestion 3

0 / 25 pts

A child's ball (a thin hollow uniform sphere) of mass 22.1 g and radius 0.289 m starts from rest and rolls without slipping down an inclined plane of vertical height 4.67 m. What is the angular speed of the sphere at the bottom of the inclined plane? Give your answer in rad/s.

IncorrectQuestion 4

0 / 25 pts

A hoop is rolling without slipping along a horizontal surface with a forward speed of 4.29 m/s when it starts up a ramp that makes an angle of 12.61 with the horizontal. What is the linear speed of the hoop after it has rolled 3.46 m up as measured along the surface of the ramp? Give your answer in m/s.