99.36: What happens to the inertia of an object when its veloa 8o riutap)23city is doubled?

  02.14: An intrinsic property of matter ijcq.5g*-y:wc )ueoqs gfp) x9s one that does not depend on the quantity of matter present. Which of the folloof5y:e9 * wp)jcq- gc.u )gsqxwing properties is NOT an intrinsic property?

  04.16: A 20 kg boulder rests on the surfacev7(m o btiy)-mq;m9i7vwq .vw of the Earth. Assume the Earth has masw oq79 mvwt ;vm i)(y.7-vbqims $5.98 \times 10^{24} \; kg$ and $g = 10\;m/s^{2}$ . What is the magnitude of the gravitational force that the boulder exerts on the Earth?

  09.12: A 5.0 kg sphere is in free fall near the surface of the Earth. What is t4w pg*6sgjsx 91sc hb/he magnitude of the gravitational forc *xbsjhp46gcgs w/s91e acting on the earth by the sphere? The Earth mass is $5.98 \times 10^{24} \; kg$ .

  00.09: Is it possible for an object’s.bdus9lp*5z;4ipk7mhf(bt a velocity to increase while its acceleration decreasesbm.plb7uk;at h 5p *(zifd49s ?

  00.11: A certain particle undergoes era :*d,smjk9t -tmr :qmgwp5w 0ratic motion. At every point in its motion, the directigtaqr::d wm, 5t-p9jkw0msm* on of the particle’s momentum is ALWAYS

  17.14: A block is suspended in the air at the end of a string held by8gb8wc2r ujy 3s/ vsi( a person. The person pulls on the string uniformly accelerating the block upward for a short time. During this time, which one of the fyuj8i3(g8 srw /bv 2csollowing choices correctly identifies the Newton’s Third Law pair force to the force of the string on the block?

  07.18: In which one of the following situations is thca-2,dst3s js9fajg5smn 65ve net force constantly zero on t ad9st3 25 sgvna -jsfs6jc5,mhe object?

  13.28: An object is in free fall close y,uj39 *aw;1rwc1 y8ulwviknbcw- ,x to the ground. A person intervenes and slows the object uniformly to rest. Which one of the following statements must be true about the magnitude of the acceleration of the object as it is being stopped by the person? The magnitude of the object’s acceleration is a 9a wcj8k;ywucnbl,,1i - xuwv31wy*rand the magnitude of the acceleration from gravity is g.

  98.03: An object in eq7j(vvn gr9ik azj 2:6ouilibrium has three forces, F1 of 30 N, F2 of 50 N, and F3 of 70 N, acting on z 7jjig(29ok6vvra:n it. The magnitude of the resultant ofF1 and F2 is

  01.07: A force of 6 Newtons and a force of 10 newtons can beq aoa*2g7ufz b/7( 6x;uzoit w3cigp( combine to form a resultant with a magnitude of which ofu biifg( gc(x7 2zaotq uz6 a;*o73/pw the following

  10.06: Which of the following statements is most closely associated withdf 61u,fmrq 9h1)zmeb Newton’s Third Law of M bfe zu1h1m9f) m6drq,otion?

  95.06: The reaction fomb+ /wcv*w,w7g/mj1x:o blfprce does not cancel the action force because:

  14.14: A box rests on the floor of an elevator. The elevator i9-eomwnx50 au s accelerating upward. Which one of the following choicn90aeuw 5 xm-oes best represents the Newton’s Third Law pair force to the gravitational force acting on the box by the Earth?

  15.15: A skydiver falls downward through the air witsohh40-d v qoo 8-rv,th constant speed. Which one of the following choices correctly describes the Newton’s Third Law pair fo40 td-h,hr sqv8 ooov-rce to the air resistance acting on the skydiver during the fall?

  06.08: A baseball is thrown by a pitcher with a speed of 35 m/s. The battersw;d1f 5yel3 )fjluax 9eings and hits the ball. The magnitude of the forc;x)15f ujayfle93edle that the ball exerts on the bat is always

  11.13: A physics book sits at rest on a table. On top of the book is a c/peln8nc.9q 1)(mtswv 9 h vgaalculator, also at agw/ v19 sc hq.vt)(ep nmn89lrest. Which one of the following choices is the Newton’s Third Law pair force to the force that the table exerts on the book?

  05.06: The students in a Physics I class were in lab conducting an experimtrfpq7+,c+aqhy5d x 8 ent related to Newton's Second Law. The collected dafyc8+hrq7px+ ,a q5 tdta were displayed on the graph at the right. From this graph, what conclusions can the students make?

  99.03: If the net force on an object were doubled while at thetj khml74 a0q+ same time the mass of the object was halved+7k 0qah jl4mt,then the acceleration of the object is

  96.15: A car whose mass is 1500 kg is accelerated uniformly f1shl )lhfd9fxm+st: m96be 5 d.svr.yrom rest to a speed of 20 m/s in 10s. The magnitude of the net force am6d mh l).+:5eydb1rx9s flth fs9.vsccelerating the car is:

  99.05: A tractor-traipo zg6:2romf0 ler truck is traveling down the road. The mass of the trailer is 4g0m pz:rfo62 o times the mass of the tractor. If the tractor accelerates forward, the force that the trailer applies on the tractor is

  99.16: Which of the fol2p ry::z3nj+*reg(zr w-m xf(,ex uoylowing principles best explains why large tractor-trailer trucks generally accelerate much more m :2o (-x,*(3zywxrzyeepr +jfung :r slowly that automobiles?

  99.19: A 50 kilogram skater at rest on a frictionless rink throws a 2 ki:q:ibjo2uivak 89x.poa/gj * logram ball, giving the ball a velocity of 10.0 m/s. Which statement j/i aoo.jgb kp2 a: i98vu*q:xdescribes the subsequent motion?

  00.13: An object near the surface of the earth with a weightjei 0voyd1i 2u*jz+-v of 100 newtons is acceleratij2-i* 1dyv 0jzuve+oed at $4\;m/s^{2}$ . What is the net force on the object?

  98.25: A car whose mass is 1200 kg is accelerated from rest by a constant fww,j) gp-0g fvorce of 2400 N. What is the spe0 ,-jgvf)w wgped of the car 8.0 s after beginning?

  98.32: A 3.0-kg block with initial speed 4.0 m/s slides across a rough ho 2 b.y(gfe2wg )(t63dblyceeyrizontal floor before coming to rest. The frictional force acting on the block is 3.0 N. Howg2b ( l(bc6.eeeyf gy)dw 2t3y far does the block slide before coming to rest?

  95.38: A block with initial velocity 4.0 m/s slides 8.0 m across rf 6dwftw1)f 9a rough horizontal floor before coming to rest. The coffdww9rf 6) t1efficient of friction is:

  09.21: A 20.0 kg box remains at rest on a horizontal surface while a person b,(1cm 1,e;lo:fnj onuzl ;c jpushes directly to the right on the box with a force of 60N. The coefficient of kinetic fricticju,j(zn :omcb 1l;ne;,1f olon between the box and the surface is $\mu_k$ = 0.20. The coefficient of static friction between the box and the surface is $\mu_s$ = 0.60. What is the magnitude of the force of friction acting on the box during the push?

  13.16: A block initially moving a vg9vg1 g5nvf:tx6oz- t 8 m/s accelerates uniformly to rest on a horizontal surface. The block travelv g9x5t6 v1:gfn o-vgzs a distance of 12.0 m during the slide. Which one of the following choices best represents the coefficient of kinetic friction between the surface and the block?

  00.21: A car of mass m slides ,)c d 4tci4a)pv4hoo - v9sfinacross a patch of ice at a speed v with its brakes locked. It then hits dry pavement and skids to a svfhovt4- aoii9n, 4 )pdccs4 )top in a distanced. The coefficient of kinetic friction between the tires and the dry road is μ .
If the car had a mass of 2m, it would have skidded a distance of

  00.22: A car of mass m slides across a patch of ice at a speed v wieo ww*9,qi.fcl4ex1 0ab8fw 7hoh up++u 8rkith its brakes locked. It then hits dry pavement and skiu8poxw 8u9aoh7k .iffh bwe+ rc40l w+1i *eq,ds to a stop in a distanced. The coefficient of kinetic friction between the tires and the dry road is μ .

If the car had a speed of 2v, it would have skidded a distance of

  04.32: he driver of a car makes an emergency stop by slamming onqs+pgyo50 u*e the car's brakes and skidding to a stop. How far would thqo s+peg05y*ue car have skidded if it had been traveling twice as fast?

  99.39: The driver of an automobile must carefully control each of the followinblhbetd6b1s3z56v r* g devices. Which of these devicvz16d 56 slb hte*br3bes can cause an acceleration in a moving car?
(1) the break pedal ( 2) the gas pedal ( 3) the steering wheel

  00.25: The net force on a rocket with a /fgqj ;gi*d9fyu8f: d,bu;li weight of 15000 newtons is 24000 newtons. About how much time is needed to increase the rocket ’ speed from 12 m/s to 36 m/s near the surface of the Ei:8u fq;gf9 ;/yb ifdg ju,ld*arth at takeoff?

  07.21: A box slides to the right across a horizontal floor. A person callermhvt.)roh:s z n, ny3x 4vv.:d Ted exerts a force T to the right on the box. A person called Mario exerts a force M to the left, which is half as large as the force T. Given that there is friction f and the box acceon r.,vx:4 y.t 3)hznvshrmv: lerates to the right, rank the sizes of these three forces exerted on the box.

  02.27: The diagram below shows three roller coaster tracks of equal length.c ,d4gs4ud ku ugn:s4x5k-u/ y Assume that on all tracks the roller coaster carts start fro-d d: s gk k5g/nu444xcusyu,um rest at the same elevation and moves frictionlessly over the tracks to the finish.
If all roller coaster carts start at the positions shown, on which track would the roller coaster cart be traveling the fastest at the finish?

  02.28: The diagram below shows three roller coaster tracks of equal lengthyf:epf8tan, yx+ io t8 kta ,.k06x9fl. Assume that on all tracks thia feyk apf8.tf0+y9 otnk,,:x 8tx6le roller coaster carts start from rest at the same elevation and moves frictionlessly over the tracks to the finish.
If all roller coaster carts start at the positions shown, on which track would the roller coaster cart reach the finish first?

  02.29: Assume the rollercoaster cartrolls frir2lh 0,- sfjhcctionlessly along the curved track from point A to point C under the influence of gravity. What 0- lch,sh2rfjwould be the direction of the cart's acceleration at point

  02.40: A box with a massnk4 oo0,+ydq lx. /pgzzo8u 9o of 50 kg is dragged across the floor by a rope which makes an angle of 300 with the horizontal. Which of the following would be q9 kgn/ou poz.o0ly4z, +ox8d closest to the coefficient of kinetic friction between the box and the floor if a 250 newton force on the rope is required to move the crate at a constant speed of 20 m/s as shown in the diagram?

  04.40: A 6.0 kg block initially at rest is pushed against a walzzh*sjlz:as 17voy / +l x4a7q fd9ba(l by a 100 N force as shown. Thecoefficient of kinetic friction is 0.30 while the coefficient of static friction is 0.50. What is true of the friction acting on the blockj1 ozx7z9vaa( bq/ hlas*s+4ylzf: d7 after a time of 1 second?

  05.10: A homeowner pushes a lawn mower across a horizontalp/c6guerhai,av i0 jltlp4t( 43a ;xx/ 0k1no patch of grass with a constant speed by applying a force P. The arrows in the diagram correctly indicate the directions but not necessarily the magnitudes of the various forces on the lawn mower. Which of the following relations among the varioux eu;,vor0t4xi4(k cl 60p/ghla 1/ apait3jns force magnitudes, W, f, N, P is CORRECT?

  06.14: A book leans against a crate on a table. Ni hjg) snhxb*bgj, ,e,i1e/e9 either is moving. Which of the following statements concerning this situation )jb e,xeb hgs*hg9ini ,e1,/j is CORRECT?

  06.15: A crate of toys remains at rest on a sleig:td6 l2hpu)yql2 woe) l;stgm* 35v nqh as the sleigh is pulled up a hill with an increasing speed. The crate is not fastened down to the sleigh. What force is responsible fqgs;t peh)y5dlon:l63 t mw*)lu 2v q2or the crate’s increase in speedup the hill?