James and John Dive from an Overhang into the Lake

question 166

Multiple Choice

James and John dive from an overhang into the lake below.James simply drops straight down from the edge.John takes a running start and jumps with an initial horizontal velocity of 25 m/s.Compare the time it takes each to reach the lake below if we neglect the effects of air.

• A)James reaches the surface of the lake first.
• B)John reaches the surface of the lake first.
• C)James and John will reach the surface of the lake at the same time.
• D)Cannot be determined without knowing the mass of both James and John.
• E)Cannot be determined without knowing the weight of both James and John.

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