Question

QUESTION 27 A hoop 1= M R2 starts from rest and rolls without slipping down an incline with h = 7.0 m above a level floor. The translational center-of- mass speed Vcm of the hoop on the level floor is a. none of these Ob 12 m/s O c. 9.9 m/s Od 59 m/s e.8.3 m/s

Answer 1

Question - 27 ginen initial height h=7m above the level floor, center the if, V is the speed of at of mass of the hoop floor then, for polling slipping, have, with out we V=rw Where wis the angular speed of the hoop. & p is the radius initial gravitational potential energy Ei= mgh the floor is final energy the kinetic (rotational & translational) energy. So Eta £mv²t ½ 2w2 Ef = { Ima2+ hmota?

since v=gw Era moz of етела, by conservation Е; - $ 5 = mghamra veigh Y we know that ginen, niam Э Ч. Is> 8 bit е mis — ) у - 8. 98 25 \\(s - 3 m/s («PProv) N - connect option is go, the 8.3 m/s

for incident wave Pulse from a heavier medium to less densed wedium, the reflected Wave Pulse will be non-inverted but with less amplitude of that of incident ware & moves opposite to the incident wave. & Would have the transmitted it will be same amplitude & non-inverted too. transmitted Reflected both will be non-inverted so, (NI) So, the Connect option is a. (Ni, N;)