The I.Sc lecture theatre of a college is 40 ft wide and has door at a corner.A teacher enters t 12.00 noon through the door and makes 10 rounds along the 40 ft wall back and forth during the eriod and finally leaves the class - room at 12.50 p.m. through the samedoor. compute his average speed and average velocity.

Explanation

Total distnce travelled in 50 mibnutes = 800 ft
Average sped `= 800/50 ft/min=16 ft/ min`.
At 12.00 noon he is at the door and at 12.50 pm he is again at the same door.
The displacement during the 50 min interval is zero.
Average velocity = zero