A car starts from rest and travels for 4.1 s
with a uniform deceleration of 2.1 m/s2.
What is the final velocity of the car?
Answer in units of m/s
vf=vi+at
vf=0 -2.1*4.1
To find the final velocity of the car, we can use the formula for uniformly decelerated motion:
v = u + at
Where:
v is the final velocity
u is the initial velocity (in this case, the car starts from rest, so u = 0)
a is the deceleration
t is the time period
In this case, the deceleration is given as 2.1 m/s² and the time period is given as 4.1 seconds.
Substituting these values into the formula:
v = 0 + (2.1 m/s²)(4.1 s)
v = 0 + 8.61 m/s
Therefore, the final velocity of the car is 8.61 m/s.