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A stone weighting 0.5kg falls from a height and strikes the ground in 4 seconds. It buries deep in sand in 0.09 seconds. The depth of penetration is (g=10m/s 2 ) a) 100m b) 2.0m c) 1.8m d) 0.9m A stone weighting 0.5kg falls from a height and strikes the ground in 4 seconds. It buries deep in sand in 0.09 seconds. The depth of penetration is (g=10m/s2)a) 100mb) 2.0mc) 1.8md) 0.9m
Dear student,Velocity of stone when it reaches the ground= u+at=40m/sThe stone stops in 0.09seconds. Therefore from third equation of motion,Therefore the distance travelled=
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