stone falls from a wall of certain height and reaches in earth in 4 second what is the average speed of the stone
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Answer:
24.5m/s
Explanation:
Average speed = total travel distance/total time
total distance
1st second distance= 9.8m
distance travel in 2nd second = 19.6m
distance travel in 3rd second = 29.4m
distance travel in 4th second = 39.2m
total distance 9.8+19.6+29.4+39.2= 98m
average speed= 98/4 = 24.5 m/s
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