Calculate the average velocity of a motor cycle that travels 72km/hr in 20 seconds

The average velocity of the motor cycle in m/s = 20 m/s

Explanation:

Given;

average velocity of the motor cycle, v = 72 km/h

time of motion, t = 20 s

The average velocity is already given in the question, the time in the question is irrelevant.

You can also convert the 72 km/h to m/s by dividing by 3.6 km/h

Thus, 72 km/h divided by 3.6 km/h = 72 / 3.6 = 20 m/s

Therefore, the average velocity of the motor cycle in m/s = 20 m/s

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has mass of one amu