Answer:
Therefore the average speed of a rock launched 700km from a catapult in 15 seconds is 46666.66 m/s or 46.66 km/s.
Step-by-step explanation:
Given:
Total Distance Covered = 700 km = 700 × 1000 meter = 700000 m
Time taken = 15 seconds = 15 s
To Find:
Average speed of a rock = ?
Solution:
Average speed:
Average speed is defined as the rate of total distance covered in per unit time.
It is given as

Substituting the given values we get

Therefore the average speed of a rock launched 700km from a catapult in 15 seconds is 46666.66 m/s or 46.66 km/s.