Sagot :
Answer:
Given:
vi ( initial velocity ) = 30 m/s
vf ( final velocity ) = 0 m/s ( comes to stop )
t ( time ) = 3 s
a ( acceleration ) = ? unknown
Solution:
We can use the formula ( a = vf - vi / t )
a = vf - vi / t
= 0 m/s - 30 m/s / 3s
= - 30 m/s / 3 s
= - 10 m/s² ( decelerating )
Answer:
The acceleration of the car is equal to - 10 m/s² ( decelerating )
It is negative since it is moving in opposite direction making it decelerates.