Question

A driver decreases the speed of a car from 25m/s to 10m/s in 5 seconds. Find the acceleration f the car.
write ans will be mark as braunlest do fast pls pls ​

Answer 1

Answer:

First if all we should note that in this problem the term 'speed' is being used in the same sence as 'velocity'

Here'

Initial velocity of car, u = 25m/s

Final velocity of car, v = 10m/s

And,

Time taken, t = 5s

Now, putting these value in the formula for acceleration:

a = v-u/t

We get:

a = 10-25/5 m/s²

a = - 15/5 m/s²

a = -3m/s²

Thus,

The acceleration of car = -3m/s²

The negative sign of acceleration means that it is retardation

So,

We can also say that

The car has a retardation of +3m/s²

be brainly✔

Answer 2

Answer:

u=25m/s

v=10m/s

a=v-u/t

=10-25/5

= -15/5

=-3m/s^2