Question

Сани тянут на пути 100м с силой 80 Н за верёвку, составляющую угол 30градусов с горизонтом. Какая работа совершается над санями?

Answer 1

A=F*s*cos30=80*100*sqrt3/2= 1730 Дж

Answer 2

Calculation of Work Done

To calculate the work done in pulling the sled, we can use the formula:

Work = Force × Distance × cos(θ)

Where: - Force (F) = 80 N (the force applied to the sled) - Distance (d) = 100 m (the length of the path) - θ = 30 degrees (the angle between the force and the horizontal direction)

Plugging in the values into the formula, we get:

Work = 80 N × 100 m × cos(30°)

To calculate the cosine of 30 degrees, we can use a calculator or refer to a trigonometric table. The cosine of 30 degrees is approximately 0.866.

Work = 80 N × 100 m × 0.866

Simplifying the expression, we find:

Work ≈ 6,928 Joules

Therefore, the work done in pulling the sled is approximately 6,928 Joules.