3. (a) What energy is expected in pulling a cart of
mass 800kg on the level at a steady rate over a
distance of 1.2km, if the coefficient of friction
between the wheels and the road is 0.25?
(b) What was the power required if it took 20
minutes to do the job. What was the horse
power. (g = 10 ms

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