If the drive efficiency is 80%, the torque required on the input shaft to create 1000N output thrust is

Question

Common Data Questions Q. 01 and Q. 02.

A compacting machine shown in the figure below is used to create a desired thrust force by using a rack and pinion arrangement. The input gear in mounted on the motor shaft. The gears have involute teeth of 2mm module.               

1. If the drive efficiency is 80%, the torque required on the input shaft to create 1000N output thrust is

      (a) 20 Nm                                                           (b) 25 Nm

      (c) 32 Nm                                                           (d) 50 Nm

        2 . If the pressure angle of the rack is 20⁰, the force acting along the line of action between the rack and the gear teeth is

      (a) 250 N                                                            (b) 342 N

      (c) 532 N                                                            (d) 600 N