In a simple machine the energy input is 120J if the efficiency of the machine is 80% calculate the energy output

What is the maximum acceleration of the wing tips, in units of g?

What is the coefficient of kinetic friction μk between the block and the tabletop?

An owl dives toward the ground with a constant velocity of 4.40 m/s at 53.0° below the horizontal. the sun is directly overhead and casts a shadow of the owl directly below it. what is the speed (in m/s) of its shadow on level ground?