Question

Тележка массой 60 кг движется горизонтально без трения с ускорением 2 м/с2 из состояния покоя. Какую работу произведет сила тяги за первые 20 с? Т.к путь в задаче не дан,можете взять любой)

Answer 1

Calculation of Work Done by the Traction Force

To calculate the work done by the traction force on the cart, we need to use the formula:

Work = Force × Distance

In this case, the force is the traction force and the distance is the distance traveled by the cart. Since the problem does not provide the distance, we can assume any distance for the purpose of calculation.

Let's assume that the cart travels a distance of 40 meters in the first 20 seconds.

Using the formula, we can calculate the work done by the traction force:

Work = Traction Force × Distance

Given: - Mass of the cart = 60 kg - Acceleration = 2 m/s^2 - Time = 20 s - Distance = 40 m (assumed)

To find the traction force, we can use Newton's second law of motion:

Force = Mass × Acceleration

Substituting the given values:

Force = 60 kg × 2 m/s^2 = 120 N

Now we can calculate the work done:

Work = 120 N × 40 m = 4800 J

Therefore, the work done by the traction force in the first 20 seconds is 4800 Joules.

Please note that the assumed distance of 40 meters is arbitrary and may not reflect the actual distance traveled by the cart. The work done will vary depending on the actual distance traveled.