A pulley system has 2 masses. A 15 kg mass and a 10 kg mass. The pulley is at rest and the 15kg mass is 10 m from the ground. The pulley is released and the masses start to move.
a) what is the Tension in the cable
b) what is the velocity of the mass just before it hits the ground
c) how much time will it take

graph slopes whilst gas cools, then it is flat whilst conensation to liquid happens, the coolong liquid then graphs as a slope when it solidifies graph is flat

latent heat

d) physical means can be used to separate the components of air.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.