A 10-Kg Rock and a 20-Kg Rock Are Dropped at the Same

question 117

Multiple Choice

A 10-kg rock and a 20-kg rock are dropped at the same time and experience no significant air resistance.If the 10-kg rock falls with acceleration a,what is the acceleration of the 20-kg rock?

• A)4a
• B)2a
• C)a
• D)a/2
• E)a/4