Atruck 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

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

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

Substituting the given values,

                              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

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it