How much work does a crane do to lift a 144 kg crate up 34 m in the air?

What is the kinetic energy of a 10-kg bicycle moving at 10 m/s

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

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?