A mass m falls freely from rest through height h. Its momentum is m√(ngh). Find n.
Physics · Mixed Chapter
JEE Main Practice

Question

A mass m falls freely from rest through height h. Its momentum is m√(ngh). Find n.

G1 Physics · Accepted Answer

Step 1: Energy conservation ½mv²=mgh ⇒v²=2gh. Step 2: Linear momentum p=mv=m√(2gh). Step 3: Comparing p=m√(ngh) gives n=2.