Question

СРОЧНО ПОЖАЛУЙСТА !!!!!!! Старший брат катит младшего на санях, прикладывая силу в 0,7 кН. Расстояние от детского сада до дома 1,5 км. Веревка от саней с горизонтом составляют 60°. Какая работа была совершена?

Answer 1

Ответ:

Объяснение:

Дано:

F = 0,7 кН = 700 Н

S = 1,4 км = 1 400 м

α = 60°;     cos α = 0,5

_________________

A - ?

Работа:

A = F·cos α · S

A = 700·0,5·1500 = 525 000 Дж = 525 кДж

Answer 2

Calculation of Work Done

To calculate the work done, we need to multiply the force applied by the distance over which it is applied. In this case, the force applied is 0.7 kN and the distance is 1.5 km.

First, let's convert the force from kilonewtons (kN) to newtons (N). Since 1 kN is equal to 1000 N, the force applied is 0.7 kN * 1000 N/kN = 700 N.

Next, let's convert the distance from kilometers (km) to meters (m). Since 1 km is equal to 1000 m, the distance is 1.5 km * 1000 m/km = 1500 m.

Now we can calculate the work done using the formula: work = force * distance.

work = 700 N * 1500 m = 1,050,000 N·m.

Therefore, the work done is 1,050,000 N·m.

Additional Information

It's worth noting that the angle of the rope with the horizon (60°) is not directly relevant to calculating the work done in this scenario. The work done depends on the force applied and the distance over which it is applied, regardless of the angle of the rope.

If you have any further questions, feel free to ask!