In the Following lever system, what is counter-clockwise torque? A.18 Nm
B.240 Nm
C.360 Nm
D.480 Nm

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explanation:

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

measuring things 1 litre of water

a is the best answer your welcome