Physics: Acar going at 30 m/s undergoes an acceleration of 2 m/s^2 for 4 seconds. what is it s final speed? how far did it travel while it was accelerating

The mass is 4.7 . The formula for mass is force over acceleration....

Acar going at 30 m/s undergoes an acceleration of

noahook84

11.03.2022

Explanation:

It is given that,

Initial velocity of the car, u = 30 m/s

Acceleration of the car, a = 2 m/s²

Time taken, t = 4 seconds

(1) We need to find the final velocity of the car. It can be calculated using first equation of motion as :

v=u+at

$v=30\ m/s+2\ m/s^2\times 4\ s$

v = 38 m/s

The final speed of the car is 38 m/s.

(2) Let s is the distance travelled by the car. Using third equation of motion as :

v^2-u^2=2as

$s=\dfrac{v^2-u^2}{2a}$

$s=\dfrac{(38\ m/s)^2-(30\ m/s)^2}{2\times 2\ m/s^2}$

s = 136 meters

So, while accelerating it will travel 136 meters. Hence, this is the required solution.

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