Answer:
The loss in mechanical energy is 668.25 J
Explanation:
As per the question:
Mass of the base runner, m = 66 kg
Velocity of the runner, v = 4.5 m/s
Coefficient of friction, [tex]\mu = 0.70[/tex]
Now,
The mechanical energy lost due to friction is provided by the work done in the form of the Kinetic energy of the runner:
Work done, W = Kinetic enrgy of the runner
W = [tex]\frac{1}{2}mv^{2}[/tex]
W = [tex]\frac{1}{2}\tiems 66\times (4.5)^{2} = 668.25 J[/tex]
Work done must be - 668.25 J as the runner slows down.
