Bob the Builder is trying to loosen a nut with a wrench. Holding the end of the
ID: 776365 • Letter: B
Question
Bob the Builder is trying to loosen a nut with a wrench. Holding the end of the wrench and pulling as hard as he can, he is unable to loosen the nut. If Bob were to tie a length of rope to the end of the wrench as shown in the figure and again pull as hard as he can, o he would be more likely to loosen the nut because the moment arm has lengthened, thus increasing the torque he is exerts on the nut. O he would still not be able to loosen the nut because the moment arm is the same as before, leaving the torque he exerts on the nut unchanged. O he would be less likely to loosen the nut because the moment arm has shortened, thus decreasing the amount of torque he exerts on the nut.Explanation / Answer
Ans: He would still not be able to loosen the nut because the moment arm is the same as before, leaving the torque he exerts on the nut unchanged.
Moment arm is the perpendiculat distance between the point of application of force and the pivot.
In both the cases, the force is being applied at the same point hence the moment arm is same.So no change in torque.