Question

Автомобиль массой 500 кг движется со скоростью 16 м/с, начинает тормозить и через некоторое время останавливается. Сколько секунд длилось торможение, если общая сила сопротивления движению составляет 2000 Н?

Answer 1

M=500 кг
v=16 м/с
F=2000 Н

t=?

$t= \frac{p}{F} = \frac{mv}{F} = \frac{500*16}{2000}= \frac{8000}{2000}=4$ с (кг * м/с / Н).

Answer 2

Calculation of Braking Time

To calculate the duration of braking, we need to determine the deceleration of the car. Deceleration is the rate at which the car slows down. It can be calculated using the formula:

Deceleration = Total Resistance Force / Mass of the Car In this case, the total resistance force is given as 2000 N, and the mass of the car is 500 kg. Let's calculate the deceleration:

Deceleration = 2000 N / 500 kg = 4 m/s^2

Now, we can use the deceleration to calculate the braking time. The formula for calculating the braking time is:

Braking Time = Initial Velocity / Deceleration The initial velocity is given as 16 m/s. Let's calculate the braking time:

Braking Time = 16 m/s / 4 m/s^2 = 4 seconds

Therefore, the duration of the braking is 4 seconds.

Please note that the calculations provided are based on the given information and assumptions.