Mining Engineering
2024 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE MN 2024 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 55–57 of 65. Imported answers require review unless explicitly marked reviewed.
Question 55
Open questionMNNAT2 marksNeeds review
A circular tunnel is constructed at a depth of 100 m. The average unit weight of overburden rock is 27.0 kN/m
. If the tangential stress measured at point A located at the horizontal boundary of the tunnel as shown, is 5.0 MPa, the tangential stress at point B in MPa, is_____. (round off up to 2 decimals) 
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A mine worker weighing (W) 600 N lifts an object of 100 N as shown. The 50% body weight is applied downward through point A and a force
is produced parallel to x axis by the contraction of erector spinae muscle during lifting. The lumber disc, L (shown by red box) acts as a smooth hinge and keeps the upper body in static equilibrium. Ignore all other forces in the body. The magnitude of the resultant of the reaction forces, in N at the lumber disc, is _____. (round off up to 2 decimals) 
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A solid ball of mass 10 kg is subjected to forces as shown. The magnitude of the acceleration in m/s
, is _____. (round off up to 2 decimals) 
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