AP PHYSICS CIRCULAR MOTION EXAM QUESTIONS
ANSWERS
A cblock cof cmass cm cslides cdown ca ccircular cramp cof cradius cr cas cshown cabove. cThe cfriction cfo
cslides cwith cconstant cspeed cv cfrom cX cto cY. cWhich cof cthe cfollowing cis ctrue cof cthe cblock cat can
cY?
A. cThe cnet cforce con cthe cblock cis czero. c
B. cThe cnet cforce con cthe cblock cis cconstant cin cmagnitude cbut cvaries cin cdirection. c
C. cThe cnet cforce con cthe cblock cvaries conly cin cmagnitude. c
D. cThe cnet cforce con cthe cblock cvaries cin cboth cmagnitude cand cdirection. c- cCORRECT cANS✔✔
cis cconstant cin cmagnitude cbut cvaries cin cdirection.
Two cartificial csatellites, c1 cand c2, corbit cthe cEarth cin ccircular corbits chaving cradii cR1 cand cR2, cre
cR2 c= c2R1, cthe caccelerations ca2 cand ca1 cof cthe ctwo csatellites care crelated cby cwhich cof cthe cfo
A. ca2 c= c4 ca1
B. ca2 c= c2 ca1 c
C. ca2 c= ca1/2
D. ca2 c= ca1/4 c- cCORRECT cANS✔✔D. ca2 c= ca1/4
Two csolid cspheres cof cradius cR cmade cof cthe csame ctype cof csteel care cplaced cin ccontact, cas csh
cThe cmagnitude cof cthe cgravitational cforce cthat cthey cexert con ceach cother cis cF1. cWhen ctwo coth
cmade cof cthis csteel care cplaced cin ccontact, cwhat cis cthe cmagnitude cof cthe cgravitational cforce cth
A. cF1 c
B. c3 cF1 c
C. c9 cF c
D. c81 cF c- cCORRECT cANS✔✔D. c81 cF
Some cstudents chave cdetermined cthe cgravitational cmass cof can cobject cand cwant cto ccompare cit
cProcedures cthat cwould callow cthem cto caccomplish cthis cinclude cwhich cof cthe cfollowing? cSelect
A. cHanging cthe cobject cvertically cfrom ca cspring cscale cand crecording cthe cscale creading c
B. cPlacing cthe cobject con cone cside cof ca cdouble cpan cbalance, cadding cobjects cof cknown cmass c
cmasses care cbalanced, cand crecording cthe camount cof cmass cadded c
C. cAttaching cthe cobject cto ca cspring cof cknown cspring cconstant, callowing cit cto coscillate chorizont
csurface, cand cmeasuring cthe cperiod c
ANSWERS
A cblock cof cmass cm cslides cdown ca ccircular cramp cof cradius cr cas cshown cabove. cThe cfriction cfo
cslides cwith cconstant cspeed cv cfrom cX cto cY. cWhich cof cthe cfollowing cis ctrue cof cthe cblock cat can
cY?
A. cThe cnet cforce con cthe cblock cis czero. c
B. cThe cnet cforce con cthe cblock cis cconstant cin cmagnitude cbut cvaries cin cdirection. c
C. cThe cnet cforce con cthe cblock cvaries conly cin cmagnitude. c
D. cThe cnet cforce con cthe cblock cvaries cin cboth cmagnitude cand cdirection. c- cCORRECT cANS✔✔
cis cconstant cin cmagnitude cbut cvaries cin cdirection.
Two cartificial csatellites, c1 cand c2, corbit cthe cEarth cin ccircular corbits chaving cradii cR1 cand cR2, cre
cR2 c= c2R1, cthe caccelerations ca2 cand ca1 cof cthe ctwo csatellites care crelated cby cwhich cof cthe cfo
A. ca2 c= c4 ca1
B. ca2 c= c2 ca1 c
C. ca2 c= ca1/2
D. ca2 c= ca1/4 c- cCORRECT cANS✔✔D. ca2 c= ca1/4
Two csolid cspheres cof cradius cR cmade cof cthe csame ctype cof csteel care cplaced cin ccontact, cas csh
cThe cmagnitude cof cthe cgravitational cforce cthat cthey cexert con ceach cother cis cF1. cWhen ctwo coth
cmade cof cthis csteel care cplaced cin ccontact, cwhat cis cthe cmagnitude cof cthe cgravitational cforce cth
A. cF1 c
B. c3 cF1 c
C. c9 cF c
D. c81 cF c- cCORRECT cANS✔✔D. c81 cF
Some cstudents chave cdetermined cthe cgravitational cmass cof can cobject cand cwant cto ccompare cit
cProcedures cthat cwould callow cthem cto caccomplish cthis cinclude cwhich cof cthe cfollowing? cSelect
A. cHanging cthe cobject cvertically cfrom ca cspring cscale cand crecording cthe cscale creading c
B. cPlacing cthe cobject con cone cside cof ca cdouble cpan cbalance, cadding cobjects cof cknown cmass c
cmasses care cbalanced, cand crecording cthe camount cof cmass cadded c
C. cAttaching cthe cobject cto ca cspring cof cknown cspring cconstant, callowing cit cto coscillate chorizont
csurface, cand cmeasuring cthe cperiod c
