Question

A car accelerated at 10 m/s/s from a speed of 20 m/s to 45 m/s. How
long did this take?

Answer 1

The answer is

2.5 s

Step-by-step explanation:

From the question we are finding the time it took for the object to move from it's initial speed to it's final speed

To find the time we use the formula

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

where

t is the time taken

v is the final velocity

u is the initial velocity

a is the acceleration

From the question

v = 45 m/s

u = 20 m/s

a = 10 m/s²

The time taken is

`t = (45 - 20)/(10) = (25)/(10) = (5)/(2) \\`

We have the final answer as

2.5 s

Hope this helps you