IN BRINGING A BODY FROM ZERO POTENTIAL TO SOME POTENTIAL,A FORCE IS APPLIED TO DO THAT.THE WORK DONE BY FORCE IS CONSIDERED AS P.E.THEN,HOW GRAVITATIONAL POTENTIAL ENERGY=MGH,AS MG = WEIGHT OF BODY(THE FORCE WE ARE APPLYING)IS EQUAL TO GRAVITY AND BOTH GRAVITY AND APPLIED FORCE CANCELS OUT.PLS EXPLAIN HOW THE BODY DISPLACES?

moment of inertia of a equilateral triangle about an axis passing through centre and perppendicular to the plane

. Because of the rotation of the earth, a plumb bob may not hang exactly along the direction of
the earth’s gravitational pull (its weight) but deviates slightly from this direction. Calculate the
deviation (a) at 40 latitude, (b) at the poles, and (c) at the equator

The length of a massless rod is measured using vernier callipers having 10 vernier scale divisions and least count of 0.1 mm. Two masses 1.00 ± 0.01 kg and 4.00 ± 0.02 kg are attached to its ends. If reading of vernier scale is 5 divisions coinciding with 1.3 cm, what is the % error in locating centre of mass from lighter mass

A block is kept on x-y plane at a point (2m,3m). It is pushed with a force of magnitude 10 Ntowards point (5m,7m). The force can be represented as?