A sports car accelerates from rest to 28 m/s at an average acceleration of 7.0 m/s2. Calculate the time it takes for the car to accelerate. I am unsure of what equation to use.
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Use the following equation for constant acceleration:
V = V(0) + a * t; V = final velocity, V(0) = initial velocity = 0, a = acceleration = 7.0m/s^2, and you need to solve for t = time. Rearrange the equation to solve for t:
V = V(0) + a * t
V = 0 + a * t
V / a = t; plugging in the numbers gives:
(28m/s) / 7.0m/s^2 = t
4s = t = the time that was required for the car to accelerate.
I hope this helps.
V = V(0) + a * t; V = final velocity, V(0) = initial velocity = 0, a = acceleration = 7.0m/s^2, and you need to solve for t = time. Rearrange the equation to solve for t:
V = V(0) + a * t
V = 0 + a * t
V / a = t; plugging in the numbers gives:
(28m/s) / 7.0m/s^2 = t
4s = t = the time that was required for the car to accelerate.
I hope this helps.