If the output distance from a to b is 20 cm, and the input distance from a to c is 80cm, then the mechanical advantage of the system is ... a 20 b 80 c 4 d .25

The rearrangement of particles in a physical change. hope this

Ithink the answer would be a 

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