Question

M = 5кг h = S = 3м A = 30Дж F - ? какую формулу использовать?

Answer 1

Формула такова:
F=mg.

Если бы прочла условие задачи, то могла бы написать решение, а так написано просто дано.

Answer 2

To find the force (F) in this scenario, you can use the formula for potential energy (PE) in the context of gravity:

$PE = m \cdot g \cdot h$

where:

• PE is the potential energy (in joules, J)
• m is the mass (in kilograms, kg) of the object
• g is the acceleration due to gravity (approximately 9.81 m/s^2 on Earth)
• h is the height (in meters, m) of the object above a reference point

In this case, you are given:

• m = 5 kg (mass of the object)
• h = 3 m (height)

And you need to find the force (F) given that the potential energy (PE) is 30 J.

Since potential energy (PE) is given by:

$PE = 30 \, \text{J}$

and $PE = m \cdot g \cdot h$, we can rearrange the formula to solve for force (F):

$F = \frac{PE}{h}$

Now, substitute the known values:

$F = \frac{30 \, \text{J}}{3 \, \text{m}}$

$F = 10 \, \text{N}$

So, the force (F) required to raise a 5 kg object to a height of 3 meters is 10 Newtons.