Question

Машина ехала со скоростью 36км/ч затем начал тормозить и через 2 сек. остановился, каков путь торможения?

Answer 1

V0= 36 км/ч =10 м/с
v =0 м/с
ускорение
a = v- v0 / t = 0 - 10 /2 = - 5 м/с2
путь торможения S = v0*t + at^2/2 = 10*2 -5*2^2/2= 10 м

Answer 2

Calculation of Stopping Distance

To calculate the stopping distance of a car, we need to consider the initial speed of the car, the time it takes to stop, and the deceleration rate. In this case, the car was initially traveling at a speed of 36 km/h and came to a stop after 2 seconds.

To calculate the stopping distance, we can use the formula:

Stopping Distance = Initial Speed × Time + (1/2) × Acceleration × Time^2

In this case, the acceleration is the deceleration rate, which can be calculated using the formula:

Acceleration = Change in Speed / Time

Since the car came to a stop, the change in speed is equal to the initial speed. Therefore, the deceleration rate can be calculated as:

Acceleration = Initial Speed / Time

Let's calculate the stopping distance using the given information.

Calculation:

Initial Speed = 36 km/h

Time = 2 seconds

Acceleration = Initial Speed / Time

Acceleration = 36 km/h / 2 seconds

Acceleration = 18 km/h/s

Stopping Distance = Initial Speed × Time + (1/2) × Acceleration × Time^2

Stopping Distance = 36 km/h × 2 seconds + (1/2) × 18 km/h/s × (2 seconds)^2

Stopping Distance = 72 km + 18 km/s × 4 seconds

Stopping Distance = 72 km + 72 km

Stopping Distance = 144 km

Therefore, the stopping distance of the car is 144 kilometers.