Question

What is the acceleration of a 30-kg object

that is traveling at vi = 15 m/s and slows to
Ve= 5 m/s in 8 seconds?

Answer 1

-1.25m/s²

Step-by-step explanation:

Given parameters:

Mass of object = 30kg

Initial velocity = 15m/s

Final velocity = 5m/s

Time = 8s

Unknown:

Acceleration of the object = ?

Solution:

Acceleration is the rate of change of velocity with time.

Acceleration =
`(V - U)/(t)`

V is the final velocity

U is the initial velocity

t is the time taken

To solve this problem, insert the parameters:

Acceleration =
`(5- 15)/(8)` = -1.25m/s²

This shows that the object is decelerating.