True or False. Please explain answer. a) In the absence of net external force, the center...

True or False. Please explain answer.

a) In the absence of net external force, the center of mass of a system remains at a fixed location.

b) Total mechanical energy can be a negative quantity.

Solutions

Expert Solution

REDMI NOTE 5 PRO (6) Total mec hani cal energy can be a negative We know that, potential %3D mechanical enersy Rsuons mass cannot be ve and also v cainol be-ve A ke is always positive. sad but the a potential enersy depends ufis upon the reference line choose So, it be negatire also, total eners negative Hence, Cam be does nol hare anything the ith the directien system It only indicates the punod myHa reference point is taken 3uch that potential that opoen

REDMI NOTE 5 PRO absence oft net extennal force, the center of system remains at Paxi4 system of particles, hove Consider Newton s 44! particde dieto ext ry o wns tapA for cas pa ticle by the ex ternal sowrces. au the partic les rano Suneuns uapman hg oy 3ia law hey cancel in M. * 1 the ex ternal forees on the system hence the relocity f the centre of mass yinitially cOM was at rest wrt a frame at rest Wyt that rame along sane spced. Therefore, it is COM of a system be moving with not that at tixea location Fexs =0, remains a velocity v When Hence, false

genius_generous answered 5 months ago

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