Question

A boy runs 20 M/sec and after 4 sec velocity become 10m/sec find the acceleration​

Answer 1

-2.5 m/(s^2)

Step-by-step explanation:

Acceleration = Final Velocity - Initial velocity / Time

=> Acceleration = 10 - 20 /4

=> Acceleration = -10/4

=> Acceleration = -5/2

=> Acceleration = -2.5 m/(s^2)

Answer 2

Step-by-step explanation:

Hey, there!!!

Here,

Given that,

initial velocity (u)= 20 m/s

final velocity (v)= 10 m/s

now,

`acceleration \: = (v - u)/(t)`

[tex]a = 10-20/4

[tex] a= -2.5m/s^2

Therefore, theacceleration is -2.5m/s^2.

{ it gives negative acceleration because final velocity is decreased }.

Hope it helps....