Question

Автобус начинает свое движение от остановки и за 4 с увеличивает свою скорость до 36 км/ч. Затем 20 с автобус едет с постоянной скоростью и перед светофором тормозит, останавливается, до полной остановки движется в течение 10 с. Вычисли полный пройденный путь этим автобусом.

Answer 1

Дано:t1=5сV=36км/ч=10м/сt2=20сt3=8с
Решение:
Полный путь: S=S1+S2+S3.Будем считать каждый по отдельности.
V1=V0+V/2=0+10/2=5 м/с. (т.к тело начинает движение его V0=0м/с)S1=V1*t1=5*5=25(м)
V2=10 м/c (т.к. тело движется с одной скоростью)S2=V2*t2=10*20=200(м)
V3=V0+V/2=10+0/2=5 м/с (т.к. в конце тело тормозит)S3=V3*t3=5*8=40(м)
В итоге: S=25+200+40=265 (м).

Answer 2

Calculation of the Total Distance Traveled by the Bus

To calculate the total distance traveled by the bus, we need to consider the different phases of its motion.

1. Phase 1: Acceleration from 0 km/h to 36 km/h in 4 seconds - The bus starts from rest and accelerates to a speed of 36 km/h in 4 seconds. - We can use the formula distance = (initial velocity * time) + (0.5 * acceleration * time^2) to calculate the distance covered during this phase. - Since the initial velocity is 0 km/h and the acceleration is unknown, we need to find the acceleration first. - Unfortunately, the provided information does not include the necessary details to calculate the acceleration. Therefore, we cannot determine the distance covered during this phase.

2. Phase 2: Constant speed of 36 km/h for 20 seconds - After reaching a speed of 36 km/h, the bus travels at a constant speed for 20 seconds. - The distance covered during this phase can be calculated using the formula distance = speed * time. - Therefore, the distance covered during this phase is 36 km/h * 20 s = 720 meters.

3. Phase 3: Deceleration and stop for 10 seconds - The bus approaches a traffic light, decelerates, and comes to a complete stop within 10 seconds. - Since the bus comes to a complete stop, the distance covered during this phase is 0 meters.

Therefore, the total distance traveled by the bus is 720 meters.

Please note that the calculation for the distance covered during the acceleration phase is missing due to insufficient information.