Question

Чему равна работа силы тяжести, действующей на камень массой 4кг, при его падении с высоты 500м в горном ущелье на выступ, находящийся на высоте 100м?

Answer 1

Примем за начало отсчета ВЫСТУП.
Относительно выступа камень находится на высоте:
h = 500 - 100 = 400 м

Работа силы тяжести:
A = m*g*h = 4*10*400 = 16 000 Дж = 16 кДж

Answer 2

Calculation of the Work Done by the Force of Gravity

To calculate the work done by the force of gravity on a stone of mass 4 kg as it falls from a height of 500 m to a ledge located at a height of 100 m, we can use the formula:

Work = Force × Distance

In this case, the force acting on the stone is the force of gravity, which can be calculated using the formula:

Force = mass × acceleration due to gravity

The acceleration due to gravity is approximately 9.8 m/s^2.

Let's calculate the force of gravity acting on the stone:

Force = 4 kg × 9.8 m/s^2 = 39.2 N Now, we can calculate the distance over which the force of gravity acts. The stone falls from a height of 500 m to a ledge located at a height of 100 m. Therefore, the distance over which the force of gravity acts is:

Distance = 500 m - 100 m = 400 m

Finally, we can calculate the work done by the force of gravity:

Work = Force × Distance = 39.2 N × 400 m = 15,680 J

Therefore, the work done by the force of gravity on the stone is 15,680 joules.