A Man Leans Over the Edge of a Cliff and Throws

question 27

Multiple Choice

A man leans over the edge of a cliff and throws a rock upward at 4.9 m/s.Neglecting air resistance,one second later the rock's speed is

• A)zero.
• B)4)9 m/s.
• C)9)8 m/s.
• D)14.7 m/s.
• E)none of the above