A man is walking on a plank which is placed horizontally across two surpports so that equal lengthbis project at each end, if the plank is 5m long and has a mass of 3okg, what is the greatest distance from each end eat which the surpports can be placed so that a man of mass song can stand anywhere on the plank without im falling off the supports.

Agas expands from an initial volume of 0.040 m^3 and an initial pressure of 210 kpa to a final volume of 0.065 m^3 while its temperature is kept constant. how much work is done by the system?

Which of the following is an example of motion in two dimensions?

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?