Question

A child is playing with a toy car, and it accelerates

to the south from 1.2 m/s to 6.3 m/s. If the toy car's
acceleration is 2.75 m/s2, what is the amount of time
that the child takes to accelerate the car?

Answer 1

1.86s

Step-by-step explanation:

Given parameters:

Initial velocity = 1.2m/s

Final velocity = 6.3m/s

Acceleration = 2.75m/s²

Unknown:

Time it takes for the child to accelerate the car = ?

Solution:

Acceleration is the rate of change of velocity with time.

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

a is the acceleration

v is the final velocity

u is the initial velocity

t is the time taken

2.75 =
`(6.3 - 1.2)/(t)`

5.1 = 2.75t

t = 1.86s