Question

Определить потенциальную энергию медного бруса, размер которого 20×10×5см. тело находится на высоте 4м пожалуйста помогите, заранее спасибо

Answer 1

Eп=mgh=плотность меди•V•g•h V=20см•10см•5см=1000см^3=0,001м^3 Еп=8900кг/м^3•0,001м^3•10Н/кг•4м=356Дж

Answer 2

Calculating Potential Energy of a Copper Block

To calculate the potential energy of the copper block, we can use the formula:

Potential Energy (PE) = mass × gravitational acceleration × height

Given: - Dimensions of the copper block: 20×10×5 cm - Height at which the block is located: 4 m

First, we need to calculate the mass of the copper block. The density of copper is approximately 8.96 g/cm³.

The volume of the copper block can be calculated as follows: - Volume = length × width × height - Volume = 20 cm × 10 cm × 5 cm - Volume = 1000 cm³

Converting the volume to m³: - Volume = 1000 cm³ = 0.001 m³

Now, we can calculate the mass of the copper block using the density formula: - Mass = Density × Volume - Mass = 8.96 g/cm³ × 0.001 m³ - Mass = 0.00896 kg

Next, we can calculate the potential energy using the mass, gravitational acceleration, and height.

The gravitational acceleration is approximately 9.81 m/s².

Calculation

Potential Energy (PE) = mass × gravitational acceleration × height Potential Energy (PE) = 0.00896 kg × 9.81 m/s² × 4 m

Let's calculate the potential energy.