Answer:
Acceleration = -1.25 m/s²
Step-by-step explanation:
Given data:
initial velocity = 5 m/s
Final velocity = 0 m/s since the car stopped
change in time = 4 seconds
Acceleration = change in velocity/change in time
Acceleration = (Final velocity - Initial velocity)/time
Acceleration = (0-5)/4
Acceleration = -5/4
Acceleration = -1.25 m/s²
The acceleration in negative since the car was reducing speed to stop, it can also called deceleration.
It travels 10 m and then stops.
It refers to the study of motion.
Given
Initial speed (u) = 5m/s
Time (t) = 4 sec
We know the equation of motion
[tex]\rm v = u + at\\v^{2}- u^{2} = 2as[/tex]
As final velocity (v) = 0
Then
[tex]v = u +at \\\\0 = 5 + 4a\\\\a= \dfrac{5}{4}[/tex]
then
[tex]\begin{aligned} \rm v^{2}- u^{2} &= 2as \\0^{2} - 5^{2} &= 2*\dfrac{5}{4} *s\\25 &= \dfrac{5}{2}*s \\s &= 10 m\\\end{aligned}[/tex]
Thus, it travels 10 m and then stops.
more about the Kinematic link is given below.
https://brainly.com/question/25638908
