Recent content by physcrazy

pulley acceleration of the system as a whole (sign convenctions can be assigned to our wish.usually up,right +tive down,left -tive) a=total force acting/total mass = 5 g/(5+45)=1 Newton.tension in the string is due to the its elastic forces.T=m1*a=45*1=45 Newton equations: m2g-t=m2a...

when we leave the door of a fridge open,the room heats(according to what i read).how does this happen?pls explain?