A quarterback is standing stationary waiting to make a pass when he is tackled from behind by a linebacker moving at 4.75 m/s. The linebacker holds onto the quarterback and they move together in the same direction as the linebacker was moving, at 2.60 m/s. If the linebacker's mass is 153 kg, what is the quarterback's mass?

Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j