Kinetic energy is greatest when a roller coaster
1) is at the top of a hill.
2) is at the bottom of a hill.
3) has not yet started moving.
4) has just left the bottom of a hill.
provide an explanation. you!

Adiver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg·m2. he then pulls is arms and legs into a tuck position and his angular velocity increases to 12 rad/s. the net external torque acting on the diver is zero. what is his moment of inertia in the tuck position?

Asatellite component is in the shape of a cube with 10cm edges, has an evenly distributed mass of 2 kg and one bolt hole at each of four corners. if the maximum predicted random vibration environment is 10 grms, what bolt size would be a good choice for restraint? what other factors might drive bolt size besides force/stress?

What are some important factors to consider when choosing a warm-up before your workout?