answer question 13 for me.
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initial velocity(u)=0
gravity =10m/s2
distance (s)=500m
let t be taken by the stone to reach surface of the water.
s=ut+1/2gt^2
500=0×t+1/2×10×t^2
t^2=500/5
t^2=100
t=10 second
speed of sound in air =340m/s
time taken by sound of splash to reach the top of the tower =distance /speed of sound
=500/340
=1.47 second
total time taken =10=1.47
gravity =10m/s2
distance (s)=500m
let t be taken by the stone to reach surface of the water.
s=ut+1/2gt^2
500=0×t+1/2×10×t^2
t^2=500/5
t^2=100
t=10 second
speed of sound in air =340m/s
time taken by sound of splash to reach the top of the tower =distance /speed of sound
=500/340
=1.47 second
total time taken =10=1.47
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