a car starting from rest accelerates at a rate of 8.0 ms/s/s. What is its final speed at the end of 4.0 seconds?
To find the final speed of the car, we need to use the equation:
v = u + at
Where:
v = final velocity
u = initial velocity (which is 0 m/s as the car starts from rest)
a = acceleration (8.0 m/s²)
t = time (4.0 s)
Substituting the given values into the equation:
v = 0 + (8.0)(4.0)
v = 0 + 32
Therefore, the final speed of the car at the end of 4.0 seconds is 32 m/s.