Question

От остановки одновременно отходят трамвай и троллейбус. Ускорение троллейбуса в 2 раза больше, чем трамвая. Во сколько раз больше времени понадобится трамваю , чтобы достичь скорости 50 км ч

Answer 1

В 2 разв больше т.к это равноускоренное движение

Answer 2

Problem Analysis

We are given that a tram and a trolleybus start simultaneously from a stop. The trolleybus has an acceleration that is twice as large as the tram. We need to determine how much longer it will take for the tram to reach a speed of 50 km/h compared to the trolleybus.

Solution

Let's assume that the time taken by the trolleybus to reach a speed of 50 km/h is t. Since the trolleybus has an acceleration that is twice as large as the tram, we can express the acceleration of the trolleybus as 2a, where a is the acceleration of the tram.

Using the equation of motion v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time, we can write the equations for the tram and the trolleybus as follows:

For the tram: 50 = 0 + at

For the trolleybus: 50 = 0 + 2at

Simplifying the equations, we get:

For the tram: 50 = at

For the trolleybus: 50 = 2at

Dividing the equation for the trolleybus by 2, we get:

25 = at

Now, we can compare the time taken by the tram (t) to the time taken by the trolleybus (25). The tram takes 25 times longer to reach a speed of 50 km/h compared to the trolleybus.

Therefore, the tram takes 25 times longer to reach a speed of 50 km/h compared to the trolleybus.

Answer

The tram takes 25 times longer to reach a speed of 50 km/h compared to the trolleybus.