Question

a truck is moving 14 m/s to the south. if it takes the truck 20 seconds to reduce its velocity to 10 m/s south, what is its acceeleration

Answer 1

0.2 m/s north

Step-by-step explanation:

Apex

Answer 2

The acceleration of the truck is, a = - 0.2 m/s²

Step-by-step explanation:

Given data,

The initial velocity of the truck, u = 14 m/s

The final velocity of the truck, v = 10 m/s

The time taken by the truck to reduce its velocity, t = 20 s

Using the first equations of motion,

v = u + at

`a=(v-u)/(t)`

Substituting the given values,

`a=(10-14)/(20)`

a = - 0.2 m/s²

The negative sign in the acceleration indicates that the truck is decelerating.

Hence, the acceleration of the truck is, a = - 0.2 m/s²