Question

Под воздействием силы тяги, равной 6,0*10 в четвертой степени Н, скорость автомобиля возросла с 2 до 8 метров в секунду. Масса автомобиля равна 11 т. Найдите изменение кинетической энергии автомобиля, работу силы тяги и перемещение (трение не учитывать)

Answer 1

Изменение кинетической энергии dEk=m*(V2^2-V1^2)/2=11*10^3*(64-4)/2=33*10^4 Дж
A=dEk=33*10^4 Дж
S=A/F=33*10^4/6*10^4=5,5 м

Answer 2

Calculation of Change in Kinetic Energy:

To calculate the change in kinetic energy of the car, we can use the formula:

Change in Kinetic Energy = (1/2) * mass * (final velocity^2 - initial velocity^2)

Given: - Force of gravity (F) = 6.0 * 10^4 N (force of gravity is equal to the force of traction) - Initial velocity (v1) = 2 m/s - Final velocity (v2) = 8 m/s - Mass of the car (m) = 11 tons = 11,000 kg

Using the formula, we can calculate the change in kinetic energy:

Change in Kinetic Energy = (1/2) * 11,000 * (8^2 - 2^2)

Let's calculate the change in kinetic energy:

Change in Kinetic Energy = (1/2) * 11,000 * (64 - 4) = 330,000 J

Therefore, the change in kinetic energy of the car is 330,000 Joules.

Calculation of Work Done by the Force of Traction:

The work done by the force of traction can be calculated using the formula:

Work = Force * Distance

Since the force of traction is equal to the force of gravity, we can use the same force value:

Force = 6.0 * 10^4 N

To calculate the distance, we need to know the time interval during which the force is applied. Unfortunately, the given information does not provide the time interval. Therefore, we cannot calculate the work done by the force of traction without this information.

Calculation of Displacement:

The displacement of the car can be calculated using the formula:

Displacement = (1/2) * (initial velocity + final velocity) * time

Since the time interval is not provided in the given information, we cannot calculate the displacement of the car without this information.

In summary, we can calculate the change in kinetic energy of the car, which is 330,000 Joules. However, we cannot calculate the work done by the force of traction or the displacement of the car without additional information about the time interval.