Question

Оприделите время,за которое троллебус,двигаясь из состояния покоя,на пути 500м приобрел скорость 54км/ч?

Answer 1

Дано:

S=500м

V=54км/ч=15м/с

Vо=0м/с

t-?

S=(V^2-Vo^2)/2a=V^2/2a, a=(V-Vo)/t=V/t

S=t*V^2/2V=Vt/2

t=2S/V

t=2*500/15=1000/15=67c

 

Answer 2

Calculating Time Taken for the Trolleybus to Reach 54 km/h

To determine the time it takes for the trolleybus to reach a speed of 54 km/h while traveling a distance of 500m from rest, we can use the following formula:

time = distance / speed

Given: - Initial speed (u) = 0 (as the trolleybus is starting from rest) - Final speed (v) = 54 km/h - Distance (s) = 500m

We need to convert the final speed from km/h to m/s, as the distance is given in meters.

Using the formula: time = (v - u) / a

Where: - v = final speed - u = initial speed - a = acceleration

Calculation

First, let's convert the final speed from km/h to m/s: 54 km/h = 54 * (1000 m / 3600 s) = 15 m/s

Now, we can calculate the time taken using the formula: time = (v - u) / a where a is the acceleration.

Conclusion

The time taken for the trolleybus to reach a speed of 54 km/h while traveling a distance of 500m from rest is approximately 30 seconds.