Question

Авто m=1100 кг двигалась со скорость V=70 км/ч, S=15м. Определить силу торможения.

Answer 1

Наверное так, но не уверена...

Answer 2

Calculation of Braking Force

To determine the braking force, we need to use the equation F = m * a, where F is the force, m is the mass of the car, and a is the acceleration. In this case, the car is decelerating, so the acceleration will be negative.

Given: - Mass of the car (m) = 1100 kg - Velocity of the car (V) = 70 km/h - Distance traveled (S) = 15 m

First, let's convert the velocity from km/h to m/s: - 70 km/h = 70 * (1000 m / 3600 s) = 19.44 m/s Next, let's calculate the time it took for the car to travel the given distance: - Time (t) = Distance (S) / Velocity (V) = 15 m / 19.44 m/s = 0.77 s Now, we can calculate the deceleration (negative acceleration) using the equation a = ΔV / t, where ΔV is the change in velocity: - ΔV = 0 - 19.44 m/s = -19.44 m/s - Acceleration (a) = -19.44 m/s / 0.77 s = -25.26 m/s^2 Finally, we can calculate the braking force using the equation F = m * a: - Braking Force (F) = 1100 kg * -25.26 m/s^2 = -27,786 N

Therefore, the braking force acting on the car is approximately -27,786 N. The negative sign indicates that the force is acting in the opposite direction of motion, causing deceleration.

Please note that the negative sign indicates the direction of the force, not its magnitude.