Two builders carry a sheet of drywall up a ramp. Assume that W = 2.00 m, L = 3.10 m, θ = 20.0°, and that the lead builder carries a (vertical) weight of 197.0 N (44.3 lb). What is the (vertical) weight carried by the builder at the rear?

Force carried by builder at rear end is F = 308.1 N

Explanation:

As we know that the weight is carried up along the plane in rotational equilibrium condition

So here we can use the torque equilibrium condition

Torque due to force of rear person about the position of front person = Torque due to weight of the block about the position of front person

so we will have

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.