Question

Потенциальная энергия тела, поднятого на высоту 30 см, равна 225 Дж. Найдите массу тела (кг). Ускорение свободного падения принять равным 10 м/с2

Answer 1

Ответ:

Дано:

h=30см=0,3м

А=225 Дж

g=10м/с²

Найти:

m-?

Решение:

A=Е(п)=mgh;

225 Дж=m×10м/с²×0,3м

225 Дж = m×3м²/с²=>m=225 Дж / 3 м²/с²=>m=75 кг.

Ответ: Масса тела равна 75 кг

Answer 2

Calculation of Potential Energy

The potential energy of an object raised to a certain height can be calculated using the formula:

Potential Energy = mass * acceleration due to gravity * height

Given that the potential energy of the object is 225 J, the height is 30 cm (or 0.3 m), and the acceleration due to gravity is 10 m/s^2, we can use the formula to find the mass of the object.

Let's denote the mass of the object as 'm'. The equation becomes:

225 J = m * 10 m/s^2 * 0.3 m

Simplifying the equation:

225 J = 3 m

Dividing both sides of the equation by 3:

m = 225 J / 3

Calculating the value:

m = 75 kg

Therefore, the mass of the object is 75 kg.