The uniform 100-kg i-beam is supported initially by its end rollers on the horizontal surface at a and b. by means of the cable at c, it is desired to elevate end b to a position 3 m above end a. determine the required tension p, the reaction at a, and the angle q made by the beam with the horizontal in the elevated position.

I attached a free body diagram for a better understanding of this problem.

We start making summation of Moments in A,

Then we make a summation of Forces in Y,

At the end we calculate the angle with the sin.

a and b sometimes have a positive value

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.