Final answer:
The time it takes to accelerate from 20 m/s to 100 m/s with an acceleration of 1.5 m/s^2 is calculated using the formula Time = (Final velocity - Initial velocity) / Acceleration. By substituting the given values, the result is 53.3 seconds.
Step-by-step explanation:
To calculate the time it takes to accelerate from an initial velocity of 20 m/s to a final velocity of 100 m/s with an acceleration of 1.5 m/s2, we can use the formula:
Time = (Final velocity - Initial velocity) / Acceleration
Plugging in the values we have:
Time = (100 m/s - 20 m/s) / 1.5 m/s2
Time = 80 m/s / 1.5 m/s2
Time = 53.3 seconds
Therefore, it takes 53.3 seconds to accelerate from 20 m/s to 100 m/s with an acceleration of 1.5 m/s2, which corresponds to option C).