A worker is choosing among four levers to lift a heavy concrete block. To reduce the effort required as much as possible, which lever should the worker select?

Question

A worker is choosing among four levers to lift a heavy concrete block. To reduce the effort required as much as possible, which lever should the worker select? — Exam MCQ

rrbjepyq.in · Accepted Answer

C. Effort arm = 40 cm, Load arm = 10 cm — The correct choice is Effort arm = 40 cm, Load arm = 10 cm. It follows from the relevant Newtonian mechanics, motion, work, energy, power or simple-machine relationship.

rrbjepyq.in · Answer

A. Effort arm = 50 cm, Load arm = 25 cm

rrbjepyq.in · Answer

B. Effort arm = 20 cm, Load arm = 20 cm

rrbjepyq.in · Answer

D. Effort arm = 30 cm, Load arm = 15 cm

A worker is choosing among four levers to lift a heavy concrete block. To reduce the effort required as much as possible, which lever should the worker select?

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