Question

Найти потенциальную энергию бруска массой 400 грамм, поднятого на высоту 120 см от поверхности земли

Answer 1

Переводим граммы в килограммы. 400 г = 0,4 кг
Переводим см в метры = 120 см = 1,2 м
Усорение свободного падения = 9,8
Eп = m*g*h
Eп = 0,4*1,2 * 9,8= 4,704 Дж 

Answer 2

Calculating Potential Energy of a Block

To find the potential energy of a block raised to a certain height, we can use the formula:

Potential Energy (PE) = mass × gravity × height

Given: - Mass (m) = 400 grams = 0.4 kg - Height (h) = 120 cm = 1.2 m - Acceleration due to gravity (g) = 9.8 m/s^2

Using the formula, we can calculate the potential energy:

PE = mgh

PE = 0.4 kg × 9.8 m/s^2 × 1.2 m

Calculating: PE = 0.4 × 9.8 × 1.2 = 4.704 J

Therefore, the potential energy of the block raised to a height of 120 cm from the surface of the earth is 4.704 Joules.