Question

A car traveling at speed of 24 m/s comes to stop at the red light how much time will it take for the car to stop if its acceleration is -8.0 M/S2

Answer 1

Answer:

The car take the time is 3.0 sec

Explanation:

Given that,

Speed = 24 m/s

Acceleration = -8.0 m/s²

We need to calculate the time

Using equation of motion

$v = u+at$

Where, v = final velocity

u = initial velocity

a = acceleration

t = time

Put the value into the formula

$0=24-8.0\times t$

$t =\dfrac{24}{8.0}$

$t = 3.0\ sec$

Hence, The car take the time is 3.0 sec.

Answer 2

Use this formula:

final speed = initial speed + acceleration * time

0 = 24 - 8*t, t = 3 s! The answer is 3 seconds