A Girl Throws a Stone from a Bridge

question 16

Multiple Choice

A girl throws a stone from a bridge.Consider the following ways she might throw the stone.The speed of the stone as it leaves her hand is the same in each case,and air resistance is negligible. Case A: Thrown straight up.
Case B: Thrown straight down.
Case C: Thrown out at an angle of 45° above horizontal.
Case D: Thrown straight out horizontally.
In which case will the speed of the stone be greatest when it hits the water below?

• A) Case A
• B) Case B
• C) Case C
• D) Case D
• E) The speed will be the same in all cases.

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