A500n person stands 2.5m from a wall against which a horizontal beam is attached. the beam is 6m long and weighs 200n. a cable is attached to the free end of the beam and makes an angle of 45 to the horizontal and is attached to the wall.
1)determine the magnitude of the tension of the cable.
2)determine the reaction force that the wall exerts on the beam.

PART A)

Here by force balance along Y direction

Force balance along X direction

now by torque balance

PART B)

now from above equations

now net reaction force of wall is given as

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.