A hammer of mass M falls from a height h repeatedly to drive a pile of mass m into the ground. The hammer makes the pile penetrate in the ground to a distance d in single blow. Opposition to penetration is given by
A
B
+ (M + m) g
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Using law of conservation of total momentum, we get
(M + m) v = M 
s
or v = 
Let opposition to penetration be F then
Total work done = change in K.E.
i.e., F = 
(M + m) 
+ (M + m) g = 
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