Question

Лифт равномерно поднимает шесть человек с первого этажа на седьмой.Чему равна работа силы, поднимающей лифт, если масса лифта с людьми равна 500 кг,а расстояние от 1 до 7 этажа равно 18 м?

Answer 1

Дано:
m=500кг
h=18 метров
Найти: A-?
Решение:
А=m*g*h
А=500кг*9,8 м/с²*18м
А=88200 Дж = 88,2 кДж
Ответ: 88,2 кДж

Answer 2

Calculation of Work Done by the Elevator

To calculate the work done by the force lifting the elevator, we can use the formula:

Work = Force × Distance

In this case, the force is the force exerted by the elevator to lift the mass of the elevator and the people inside, and the distance is the vertical distance between the first and seventh floors.

Given: - Mass of the elevator with people = 500 kg - Distance from the first floor to the seventh floor = 18 m

To find the force, we can use Newton's second law of motion:

Force = Mass × Acceleration

Since the elevator is moving with a constant velocity, the acceleration is zero. Therefore, the force can be calculated as:

Force = Mass × Acceleration = Mass × 0 = 0 N

Since the force is zero, the work done by the force lifting the elevator is also zero.

Therefore, the work done by the force lifting the elevator is zero.