I can't figure out what the third number I need is in this question a car traveling at +20 m/s applies the brakes and stops in 6

Question

3 years ago

15

.5s. what is the cars acceleration.

1 answer:

dlinn [17] · Answer 1 · 2022-06-26T03:50:10+03:00

The acceleration is $-3.1 m/s^2$

Explanation:

The acceleration of an object is the rate of change in velocity of the object.

Mathematically, it is given by

$a=\frac{v-u}{t}$

where

u is the initial velocity

v is the final velocity

t is the time taken for the velocity to change from u to v

For the car in this problem, we have:

u = +20 m/s

v = 0 (because the car comes to a stop)

t = 6.5 s (time taken)

Therefore, the acceleration is

$a=\frac{0-(+20)}{6.5}=-3.1 m/s^2$

Where the negative sign means that the direction of the acceleration is opposite to the direction of the initial velocity.

Learn more about acceleration:

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