Question

Розв'язати задачі: 1. Людина, яка стоїть на дробині на висоті 2 м, має потенціальну енергію 1000 Дж. Якою є маса людини? 2. Яку кінетичну енергію має сталева кулька масою 200 г, що рухається зі швидкістю 36 км/год? осталось 10 мин помогите пж!!!!!!! 30 балов даю

Answer 1

Відповідь:

1)a=m*g*h

m=a/g*h

m=1000/10*2=200кг

m=200кг

Пояснення:второе не знаю

Answer 2

Problem 1: Finding the Mass of a Person

To find the mass of a person standing on a platform at a height of 2 meters with a potential energy of 1000 J, we can use the formula for potential energy:

Potential Energy (PE) = mass (m) * gravitational acceleration (g) * height (h)

Given that the potential energy is 1000 J and the height is 2 meters, we can rearrange the formula to solve for mass:

m = PE / (g * h)

The gravitational acceleration (g) is approximately 9.8 m/s^2.

Let's calculate the mass:

m = 1000 J / (9.8 m/s^2 * 2 m)

Using a calculator, we find that the mass of the person is approximately 51.02 kg.

Problem 2: Finding the Kinetic Energy of a Steel Ball

To find the kinetic energy of a steel ball with a mass of 200 g (0.2 kg) moving at a speed of 36 km/h (10 m/s), we can use the formula for kinetic energy:

Kinetic Energy (KE) = 0.5 * mass (m) * velocity^2

Given that the mass is 0.2 kg and the velocity is 10 m/s, we can substitute these values into the formula:

KE = 0.5 * 0.2 kg * (10 m/s)^2

Using a calculator, we find that the kinetic energy of the steel ball is approximately 10 J.

I hope this helps! Let me know if you have any further questions.