A mass m starting from A reaches B of a frictionless track. On reachin – McqOptions

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1.	A mass m starting from A reaches B of a frictionless track. On reaching B, it pushes the track with a force equal to x times its weight, then the applicable relation is
A.	\[h=\frac{(x+5)}{2}r\]
B.	\[h=\frac{x}{2}r\]
C.	\[h=r\]
D.	\[h=\left( \frac{x+1}{2} \right)r\]
Answer» B. \[h=\frac{x}{2}r\]

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