WHAT_IS_THE_EFFICIENCY_OF_DIFFERENTIAL_SCREWS_WHEN_PITCH_OF_THE_TWO_SCREWS_IS_12MM_AND_8MM?_THE_NUT_IS_ROTATED_BY_APPLYING_A_FORCE_OF_120N_AT_A_RADIUS_OF_300MM_AND_THE_TWO_SCREWS_REMAIN_STATIONARY._THE_TORQUE_OF_RAISING_AND_LOWERING_FOR_THE_TWO_SCREWS_IS_5K_N-MM_AND_2.5K_N-MM_WHERE_K_IS_THE_EFFECTIVE_AXIAL_WEIGHT_ON_THE_SCREW.?$

• A. 6.48%
• B. 8.48%
• C. 23.1%
• D. 42.8%