3. if a car accelerates from rest at a constant 5.5 m/s, how long will it take for the car to reach a
velocity of 28 m/s?

2.54 s

Explanation:

If we are talking about a constant acceleration, we can use the following equation:

Where:

is the final velocity of the car

is the finitial velocity of the car (it started from rest)

is the constant acceleration of the car

is the time it takes to reach with the given constant velocity

Hence:

Clearing :

Finally:

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the answer is b, have negligible mass