A car accelerates from rest at 4.9 m/s2.
How much time does it need to attain a
speed of 6 m/s?
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To find the time it takes for the car to attain a speed of 6 m/s, we can use the kinematic equation:
v = u + at
Where:
v = final velocity (6 m/s)
u = initial velocity (0 m/s since it starts from rest)
a = acceleration (4.9 m/s^2)
t = time
Rearranging the equation to solve for time (t), we have:
t = (v - u) / a
Substituting the given values, we get:
t = (6 m/s - 0 m/s) / 4.9 m/s^2
Simplifying the equation, we have:
t = 6 m/s / 4.9 m/s^2
t ≈ 1.22 seconds
Therefore, it takes approximately 1.22 seconds for the car to attain a speed of 6 m/s.