When You Throw a Pebble Straight Up with Initial Speed $\sqrt { 2 }$

question 214

Multiple Choice

When you throw a pebble straight up with initial speed V, it reaches a maximum height H with no air resistance. At what speed should you throw it up vertically so it will go twice as high?

• A)16V
• B)8V
• C)4V
• D)2V
• E) \(\sqrt { 2 }\) V