Question

Трамвай массой 6 тонн двигался со скоростью 36 км/ч . При торможении он остановился за 30 секунд. Определите силу трения, действующую на трамвай при торможении.

Answer 1

Ma=F
a=v/t
F=mv/t
v в метрах на секунду

Answer 2

Calculation of Frictional Force

To determine the frictional force acting on the tram during braking, we can use the equation:

Frictional Force = Mass of the tram * Deceleration

Given: - Mass of the tram = 6 tons = 6000 kg - Initial velocity of the tram = 36 km/h = 10 m/s - Time taken to stop = 30 seconds

To calculate the deceleration, we can use the equation:

Deceleration = Change in velocity / Time taken

The change in velocity is the initial velocity since the tram comes to a stop.

Change in velocity = Initial velocity - Final velocity

Since the tram comes to a stop, the final velocity is 0 m/s.

Change in velocity = 10 m/s - 0 m/s = 10 m/s

Now we can calculate the deceleration:

Deceleration = Change in velocity / Time taken = 10 m/s / 30 s = 0.33 m/s^2

Finally, we can calculate the frictional force:

Frictional Force = Mass of the tram * Deceleration = 6000 kg * 0.33 m/s^2 = 1980 N

Therefore, the frictional force acting on the tram during braking is 1980 N.