The warszawa radio mast in warsaw, poland, is 646 m tall, making it the tallest human-built structure. Suppose a worker raises some tools to the top of the tower by means of a small elevator. If 2.15 x 10⁵ J of work is done in lifting the tools, what is the force exerted on them?
a) 469 N
b) 215 N
c) 100 N
d) 50 N