Question

A crane lifts an l-bean to a height of 30 meters giving it a potential energy of 108,486). What is the mass of the I-beam?

Answer 1

369 kg

Step-by-step explanation:

Step 1:

We know that the expression for potential energy is

PE = mgh

where, m =Mass

g = Acceleration due to gravity

h Height

Step 2:

Here m = ?

PE = 108486

h = 30 m

g = 9.8 ms⁻²

108486 =
`30 * 9.86 * m`

`m= 108486 / (9.8*30) = 369 kg`