Question

A small block of mass m = 33 g can slide along the frictionless loop-the-loop, with loop radius R = 16 cm. The block is released from rest at point P, at height h = 5.0R above the bottom of the loop. If the gravitational potential energy of the block-Earth system is taken to be zero at the bottom of the loop, what is that potential energy when the block is at the top of the loop? (Your result must be in joules and include 3 digit after the decimal point. Maximum of 5% of error is accepted in your answer. Take g=9.80 m/s2) R дет R

QUESTİON CHANGED : --> How much work does the gravitational force do on the block as the block travels from point P to point Q?

Answer 1

son m=33 3gm R=16cm, ho SR Jo COOK done by grantectoncel force- mg (hr) - 0.033x9.80x (5R-R) = 0.033X9.80 x 4X0.16 - 0.206976 = 0.207 J. Hence "Ooxxdone by gravitational force from pont P to point a 0.207J