Each of the two grinding wheels has a diameter of 6.6 in., a thickness of 1.00 in., and a specific weight of 427 lb/ft3. When switched on, the machine accelerates from rest to its operating speed of 3600 rev/min in 4.6 sec. When switched off, it comes to rest in 36 sec. Determine the magnitudes of the motor torque and the frictional moment, assuming that each is constant. Neglect the effects of the inertia of the rotating motor armature and assume that the grinding wheels are uniform disks.

hello there!

your answer is a “generator”

a generator does not create energy but instead it transforms it.

it’s basically a motor working in reverse.

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

statement #3 on andre"s list is false.