Question

Решить задачу: За сколько времени тело прошло путь S=100 м, если оно движется со скоростью V=72 км/ч.Заранее спасибо!​

Answer 1

Ответ:

t= 5 с

Дано:

S= 100 м

v= 72 км/год= 20 м/с

_______

t-?

S= v×t => t= S/v

t= 100/ 20= 5 с

Answer 2

Дано: S=100 м; V=72 км/ч=20 м/с; t - ?

--------------------------------

1) переведем скорость из (км/ч) в (м/с), т.к. путь в метрах.

72 км/ч=72*1000 м / 3600 с=72/3,6 м/с=20 м/с.

Запомни: V (км/ч)= V/3,6 (м/с).

2) Для равномерного движения

S=V*t;  тогда  t=S/V  

(множитель t = произведение S / второй множитель V)

t=100 м / 20 (м/с)=5 с  -  это ответ.

Answer 3

Problem Analysis

To solve this problem, we need to find the time it takes for an object to travel a distance of 100 meters at a speed of 72 km/h.

Conversion of Units

First, we need to convert the speed from km/h to m/s, as the distance is given in meters. We can use the conversion factor: 1 km/h = 0.277778 m/s.

Calculation

To find the time, we can use the formula: time = distance / speed.

Let's calculate the time it takes for the object to travel a distance of 100 meters at a speed of 72 km/h.

Solution

Given: - Distance (S) = 100 m - Speed (V) = 72 km/h

Converting the speed from km/h to m/s: - Speed (V) = 72 km/h = 72 * 0.277778 m/s = 20 m/s

Using the formula: time = distance / speed, we can calculate the time it takes for the object to travel the given distance: - Time = 100 m / 20 m/s = 5 seconds

Therefore, it takes 5 seconds for the object to travel a distance of 100 meters at a speed of 72 km/h.

Note: The answer provided above is based on the given information and calculations.