Torque and Energy

You are working with your friend to build a brickfireplace. The contractor dropped 1000 - 1 kg bricks at the base ofyour driveway which must be carted to the build site inwheelbarrows.

Your wheelbarrow has handles that are a total of 2 mlong (from the wheel to your hands), with the barrow located at 1 m(from the wheel to the center of mass of the barrow).

Your friend has a wheelbarrow where the handles are atotal of 1.5 m long, with the barrow located at 0.5 m.

(A) Draw a schematic diagram of the two wheelbarrows andthe forces based on the problem description.

(B) Assuming you were to load each wheelbarrow with 100kg of bricks, which wheelbarrow will be easier to use (require lessforce to move)?

c) If you can lift with a maximum force of 100 N, andyour friend can lift with a maximum force of 125 N, how many brickscan each of you lift in your wheelbarrow?

(D) If you and your friend make the same number of tripsusing your own wheelbarrows, how many trips will it take for you tomove all the bricks to the build site?

(E) Ignoring wheelbarrows, and thinking of this simplyin terms of energy, how much work will it take to move 1000 – 1 kgbricks from your driveway to the build site, if the distance is 50m

(F) You are building the fireplace on a 1 m tallconcrete base. Assuming the bricks all start out laying on theground, what is the potential energy of the first layer of 15bricks when they are placed on the 1m tall base.