A95 kilogram student climbs 4.0 meters up a rope in 3.0 seconds. what is the power output of the student? a. 1.3 x 10^2 w

Mass of student m = 95kg
 Length of tye rope L = 4 m
 Time taken t = 3 sec
 Power = Work / t
  Work = m x g x h = 95 x 4 x 9.81 = 3727.8
 Power = 3727.8 / 3 = 1.2 x 10^3 Watts

At maximum height, kinetic energy is converted in potential energy  formula: at max height, ke = ½ * 0.27kg * (16m/s) ² = 34.56 j  so the remaining pe = (41.70 – 34.56)= 7.14 j = 0.27 kg * 9.8m/s² * h  = (9.8/7.14 * 0.27)so max height h = 5.08 or 5 m 

maria has a savings account that is earning simple interest. if she started with $200 in the account and has earned a total of $8 in interest in two years, what is the rate of the account? use the formula  .

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