Answer: Work done on the ball by air resistance = -5.049J
Explanation:
From law of conservation of energy
Potential energy + kinetic energy + Work of air resistance = Potential energy + kinetic energy +
mgh + 1/2 mv^2 + W= mgh¹ + 1/2 mv¹^2
=0.6 Kg x 9.8m/s x 2.01 +1/2 x0.60 x (7.26)^2+ W= 0.6 x 9.8 x 3.10 + 1/2 x 0.6 x 3.81
=11.8188 + 15.81288 +W = 18.228 + 4.3548
=27.63168 +W =22.58283
W = 22.578-27.63168
W=-5.049 J
Work done on the ball by air resistance = -5.049J ( N egative sign indicates that Work was in opposite direction of motion
