How much work does it take to raise a #5 kg # weight #42 m #?

1 Answer
Jul 31, 2016

Answer:

The work done against gravity is 2060 J

Explanation:

If we only consider work done against gravity we need to use this formula where #W # is the work done, #F# is the weight of the object and #d# is the height through which the object is lifted:
#W=Fd#

The weight of the object is given by:
#w = mg#

So then we combine our equations to give:
#W = mg * d#
Otherwise written as # W = mgDeltah # (this is the gravitational potential energy equation).

Now substitute values to solve for #W#:
#W = 5 × 9.81 × 42 = 2060 J#