Question

Спортсмен массой 65 кг прыгает в воду с вышки, находящейся на высоте 3 м над поверхностью воды.Какую работу совершает сила тяжести, действующая на спортсмена, при его движении до поверхности воды?Дано,найти,решение,ответ пожалуйста

Answer 1

A= m·g·H
A = 65 кг · 10 м/с² · 3 м
A = 1950 Дж
В приложении Excel вариант «живой» лист Можете вставить свои данные.

Answer 2

Дано
m= 65 кг
l=3м
Найти
A-?
Решение
Находим вес спротсмена
F=mg=65*9,81=637,65 Н
Через определение механической работы находим работу силы тяжести
А= Fl = 637,65*3= 1912,95 Дж
Ответ: 1912,95 Дж

Answer 3

Calculation of Work Done by Gravity

To calculate the work done by the force of gravity on the athlete as they move towards the surface of the water, we need to consider the change in height and the mass of the athlete.

Given: - Mass of the athlete (m) = 65 kg - Height of the diving board above the water surface (h) = 3 m

The work done by gravity can be calculated using the formula:

Work = Force x Distance

In this case, the force is the weight of the athlete, which is equal to the product of the mass and the acceleration due to gravity (g).

Force = mass x acceleration due to gravity

The acceleration due to gravity is approximately 9.8 m/s^2.

Therefore, the force of gravity on the athlete is:

Force = mass x acceleration due to gravity = 65 kg x 9.8 m/s^2

To find the distance, we consider the change in height from the diving board to the water surface, which is 3 m.

Now we can calculate the work done by gravity:

Work = Force x Distance = (65 kg x 9.8 m/s^2) x 3 m

Calculating this expression gives us the work done by gravity on the athlete as they move towards the water surface.

Please note that the calculation assumes no other external forces acting on the athlete during the dive.

Let's calculate the result:

Work = (65 kg x 9.8 m/s^2) x 3 m = 1911 J

Therefore, the work done by the force of gravity on the athlete during their dive to the water surface is 1911 Joules (J)