#1) The coefficient of static friction bwtween the block and the board is 0.6. If the blocks weight is 75 N, what minumum weight attached to the pulley will cause the block to move? #2)Find the direction and acceleration of a single pulley with 2 masses (7 kg and 10 kg) #3)A machine requires 30J of energy every minute what is the power consumption? #4)A car moving north at 60 km/h collides and lockes bumpers with a large trunk going 50 km/h West. If the mass of the car is only 1/3 that of the truck mass, what is the magnitude and direction of velocity of the combined masses? 1~ I don't even know where to start on #1... 2~ I think you start with the force equation F= ma 3~ I know the power equation is P= W/t, but how do you get work when all we are given is 30 J 4~ I know the direction is northwest, but i'm not sure how to find the magnitude of the combined masses??