Lab 2: Mechanical equivalent of heat. Theory
1. Let the falling weight have a mass M. Assuming it starts some distance h above the ground and
is allowed to fall to the ground, show that the work done by gravity is equal to:
Wg= Mgh

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 

There was no intial y-momentum so the net final y-momentum must also be 0. they can have final velocities in the y-direction

Decrease the surface area of the object and also decrease the concentration which will allow the particles to collide faster

I’m not sure about this question