Question

What is the average velocity of the coin?

• A. 1 m/sec
• B. $\frac{5}{3}m/sec$
• C. -1m/sec
• D. -10m/sec

Answer 1

The correct option is C

-1m/sec

In this case the coin falls 15m down from the point of drop so its displacement is -15m.

Negative sign as by our convention down is negative

So average velocity = $\frac{-15}{15}=-1m/sec$ ( i.e. 1 m/s towards downwards)