Answer:
h = 20 m
Explanation:
Given that,
Force to lift a firefighter's equipment, F = 270 N
Work done, W = 5400 J
We need to find the height climbed by the firefighter. We know that,
Work done, W = Fd
So,

So, the firefighter climb from a height of 20 m.
1 kilo-calorie= 4184 joules
0.001 kilo-calorie= 1 calorie
therefore 5.25 calorie=21.966 joules
Take gravity you are accelerated toward the ground. Since gravity has both a direction and a magnitude, then it is a vector.
You fallow the steps to figure out the complete answer of the question.