Question

a car has acceleration of 1.20 m/s2 and starts from 2.50 m/s. what is its speed after 5.00 seconds, in m/s?

Answer 1

The car's speed after 5 seconds is 8.5 m/s

Step-by-step explanation:

We can use this kinematics equation to evaluate the final velocity

`v_f=v_o+at`

Where

`v_f` is the final velocity

`v_o` is the initial velocity

`a` is the acceleration

`t` is the time

Numerical Evaluation

In this example we are given

`v_o=2.5\\a=1.2\\t=5`

Substituting our given values into the equation yields

`v_f=2.5+1.2*5`

Lets solve for
`v_f`.

Multiply
`1.2` by
`5`.

`v_f=2.5+6`

Add
`2.5` and
`6`.

`v_f=8.5`