A Girl Throws a Stone from a Bridge

question 34

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.
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 if there is no significant air resistance?

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