Question
Question: A body starts to slide from P, down an inclined frictionless plane PQ having inclination αwith horiz...
A body starts to slide from P, down an inclined frictionless plane PQ having inclination αwith horizontal and then ascends another smooth inclined plane QR with angle of inclination 2α. Neglecting impact at O
A
tPQ = tQ
B
tPQ<tQR
C
h' =2h
D
h' =h
Answer
h' =h
Explanation
Solution
Planes PQ and QR are frictionless and impact is neglected, so mechanical energy will conserve,
∴ h' = h