Question

Автомобиль движется со V 25м/с и тормозит до полной остоновки проезжая 120м. Считая его ускорение при торможении постоянным, нацдите это ускорение.

Answer 1

Calculation of the Deceleration of the Car

To find the deceleration of the car, we can use the kinematic equation that relates initial velocity (V), final velocity (0 m/s), acceleration (a), and displacement (d):

v^2 = u^2 + 2ad

where: - v is the final velocity (0 m/s), - u is the initial velocity (25 m/s), - a is the acceleration (which we need to find), and - d is the displacement (120 m).

Rearranging the equation, we get:

a = (v^2 - u^2) / (2d)

Substituting the given values into the equation, we can calculate the deceleration of the car:

a = (0^2 - 25^2) / (2 * 120)

Let's calculate it:

a = (-625) / 240

a ≈ -2.604 m/s^2

Therefore, the deceleration of the car is approximately -2.604 m/s^2.