Question

Мотоциклист движется со скоростью 72 км/ч.Затормозил и через 10 секунд остановился. Определите ускорение

Answer 1

A=(V-V0)/t=(0-20)/10=-2 м/с2

Answer 2

Calculating Acceleration of the Motorcyclist

To calculate the acceleration of the motorcyclist, we can use the following formula:

Acceleration (a) = Change in Velocity / Time Taken

Given: Initial velocity (u) = 72 km/h Final velocity (v) = 0 km/h (as the motorcyclist stopped) Time taken (t) = 10 seconds

First, we need to convert the initial velocity from km/h to m/s: 72 km/h = 20 m/s

Now, we can calculate the acceleration: Acceleration (a) = (0 - 20) m/s / 10 s Acceleration (a) = -2 m/s^2

Therefore, the acceleration of the motorcyclist is -2 m/s^2. The negative sign indicates that the motorcyclist is decelerating.