Question

An object moves 18m in the first 3s,22m in the next 3s and 14m in the last 3 s. What is its average speed?

Answer 1

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Answer 2

Answer:

The average speed of the object will be 6 m/s.

Explanation:

By definition, Average speed is the ratio of the "total distance travelled by an object", to the "total time taken by the object" to cover the distance, or,

$\text { Average Speed } = \frac { \text { the total distance travelled by an object } } { \text { the total time taken by the object to cover the distance } }$

According to the question,

Total distance travelled by an object

= 18m + 22m + 14m  = 54m

Total time taken by the object to cover 54m

= 3s + 3s + 3s = 9s

∴ Average Speed $=\frac {(54 m)}{(9 s)} =6m/s$

= 6 m/s (Ans.)

Thus, the average speed of the object will be 6 m/s.