Question

Груз массой 2,5 кг падает с некоторой высоты. Насколько изменится его потенциальная энергия через 1 с после начала падения? Начальная скорость груза равна нулю. (Сукорения свободного падения принять равным 10 м/с

Answer 1

E = mgh

неизвестно ни E ни h нужно заменить h

h = gt^2 / 2 = 5м так как v0 = 0м/с

найти E теперьможно по формулеE = mgh

E = mgh = 2.5 x 10 x 5 = 125Дж

 

 

Answer 2

Calculation of Change in Potential Energy

To calculate the change in potential energy of an object, we can use the formula:

Change in Potential Energy = mass x acceleration due to gravity x height

Given: - Mass of the object (m) = 2.5 kg - Acceleration due to gravity (g) = 10 m/s^2 (as given in the question) - Height (h) = unknown

We need to find the change in potential energy after 1 second of falling.

Let's calculate the change in potential energy using the given information.

Change in Potential Energy = mass x acceleration due to gravity x height

Substituting the given values: Change in Potential Energy = 2.5 kg x 10 m/s^2 x h

Since the initial velocity of the object is zero, we can use the equation of motion for free fall:

h = (1/2) x g x t^2

Substituting the values: h = (1/2) x 10 m/s^2 x (1 s)^2 h = 5 m

Now, let's calculate the change in potential energy:

Change in Potential Energy = 2.5 kg x 10 m/s^2 x 5 m Change in Potential Energy = 125 Joules

Therefore, the change in potential energy of the object after 1 second of falling from a certain height is 125 Joules.