Question

Машина массой 3 т движется по прямому участку пути по закону v=10+4t. Чему равна работа равнодействующей сил за 20 с? Ответ выразите в МДж.​

Answer 1

Вроде всё так
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Answer 2

Calculating the Work Done by the Resultant Force

To calculate the work done by the resultant force, we can use the formula:

Work = Force × Distance

In this case, the force can be calculated using the equation for velocity: v = 10 + 4t. The distance traveled can be found by integrating the velocity function over the given time interval.

Calculating the Force

The force can be calculated using the equation for velocity: v = 10 + 4t. The force can be found by differentiating the velocity function with respect to time.

Integrating the Velocity Function

Integrating the velocity function over the given time interval will give us the distance traveled by the car.

Work Calculation

Once we have the force and the distance traveled, we can calculate the work done by the resultant force using the formula: Work = Force × Distance.

Let's proceed with these calculations.