99.36: What happens to the inertia of an object w3ypxbia. nlna 9os2 3,q4a;,l:h he zvhen its velocity is doubled?

  02.14: An intrinsic property of mat *jg eyadfo*xd( t7g2c b)yp n/u5r56tter is one that does not depend on the quantityb efu6gd*pno 5c(gta) 7ty25 /rxdjy* of matter present. Which of the following properties is NOT an intrinsic property?

  04.16: A 20 kg boulder rests on the surface of the Earth. Assu+rr9o7r r) d i6s h3nhe-p,7s-yic /n fjcl8vame the Earth has mass -h 6io7 siyap+h vrr)-j/, cdrrcn9s87e3ln f $5.98 \times 10^{24} \; kg$ 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. What2f-2 a/a swavm is the magnitude aa2sfv/w am- 2of the gravitational force 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 velocity to increase while eevgs 73m9fz1z2h z *zf-/vzb its acceleration decreaseefvzsz-7hf 93 eg m/2zvz1z b*s?

  00.11: A certain particle undergoes erratic motioq ksh33hk7va .0sb i,1j +xdxln. At every point in its motion, the direction of thesd3l,q7bvsjhk+x 3 01 ixh .ka particle’s momentum is ALWAYS

  17.14: A block is suspended in the air at the end of a stri mixq jky0;-ao )eymf 5a;*m/ong held by a person. The person pulls on the string uniformly accelerating the block upward for a shym f-qaio; a 5e /y*xk);m0mojort time. During this time, which one of the following 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 situation (tp*yh ahym5-qs8,g ps is the net force constantly zero on ths*ay 8(gyp-htp,qm 5 he object?

  13.28: An object is in free fall close to the grou rceu2uas;w +* 3kq8(u 6q/s tdq5ljhund. 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 and the magnitude of the acwu 5u+c l*3 sh qa s6ukqqt28r(d/;ejuceleration from gravity is g.

  98.03: An object in equilibrium has three forces, F1 of 30 N, F2 of6j+5-xdwyxpu9bjf r u .3qe.q 50 N, and F3 of 70 N, acting on it. The magnitude of the resultant ofF1 anq9y e.j.u qp frjwb5x-63xu d+d F2 is

  01.07: A force of 6 N;a te/ azf.tq 7xy b/,y70wli5u2ji wqewtons and a force of 10 newtons can be combine to form a resultant with a magnitude of which 5zqixby q/;t a.07yilw2/ fwe 7 aj,tuof the following

  10.06: Which of the following statements is most clo: c)5 gazjbve;sely associated with Newton’s v 5;bzca:j)egThird Law of Motion?

  95.06: The reaction force doeshjl rf-ubk*,9q s;9s t not cancel the action force because:

  14.14: A box rests on the floor of an elevator. The elevator is accel u )ion . mtainh7jo x8r5wfx60h6y+c)erating upward. Which one of the following choices best representtyxm)7uach + ) xh65.oif6onnri0w8 js 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 with co,sk(7*bjb ecb nstant speed. Which one of the following choices co*c kj7b,esb (brrectly describes the Newton’s Third Law pair force to the air resistance acting on the skydiver during the fall?

  06.08: A baseball is thrown by a pitche-qj9 h2dvnc:pw.fwm1l. ,dm ur with a speed of 35 m/s. The batterswings and hits the ball. The magnitude of the force that the bm vhf : ..qln2m9uw,d-c w1pjdall exerts on the bat is always

  11.13: A physics book sits at rest on a table. On top of trup)p bg pdt:82+k;0oml*bc q he book is a calculator, also at rest. Whiccbp:2p)g0o p+ ; *ldtq8krumbh 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 ex6amj0-:4bkv)z 7a j,x + qb p)gfqnxjqperiment related to Newton's Second q)4 z+- jabgk7vfnj0jqx,:)bqam6 pxLaw. The collected data 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 w,v n)k .4a.w )oucss2r-bblgwhile at the same time the mass of the object was halved,then the acceleration of the n,)wgwc. 4bu ) r.s-b2lkoasv object is

  96.15: A car whose mass is 1500 kg is accelerated uniformly from rest zyypi6j l11 x:to a speed of 20 m/s in 10s. The magnitud6ji :y1zpxl1y e of the net force accelerating the car is:

  99.05: A tractor-trailer truck is traveling down the road. The a8 z,syrph(uu5 5+a crgo;d+bmass of the trailer is 4 t+c aa,uy 8 od;+hr g5zsp5b(urimes 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 following principles best explainsc5g+ nxw l +e4+5acszo why large tractor-trailer trucks generally accelse++o zx 4gac5lc w5+nerate much more slowly that automobiles?

  99.19: A 50 kilogram skater at rest on a frictionless rjc unx vvci 9k9 fu+fg(012z7w9a2zuwink throws a 2 kilogram ball, giving the ball a velocity of 10.0 m/z+a9ciuwj (02v7kxf1 9n9cwz u2gf vu s. Which statement describes the subsequent motion?

  00.13: An object near the surface of the earth with a weight ofqqu-tf8u u5bem/vg(15e 3 zdt un b)7j 100 newtons is accelerated at bdt7 v 18u-t 3q5mg ufejqu)(/uz5ebn$4\;m/s^{2}$ . What is the net force on the object?

  98.25: A car whose mass is 1200 kg h 9fhkdfl0 z8v- /9stcis accelerated from rest by a constant force of 2400 N. What is the speed of the car 8.0 s aftk98sf hflvc/-dh tz 90er beginning?

  98.32: A 3.0-kg block with initial speed 4.0 m/s slides / 51ojnxhzzvh)a9 82 qbh+ jhgacross a rough horizontal floor before coming to rest. The frictional force acting on the block is 3.0 N. How far does the bloh/a8jnq 2j +ozgh)x1 hz v9bh5ck slide before coming to rest?

  95.38: A block with initial -d):kh dx n 1ia9yk mgsgdnncc. b/;.4velocity 4.0 m/s slides 8.0 m across a rough horizont /4)gd.nbcynhma9. d- c1;x :ksdinkgal floor before coming to rest. The coefficient of friction is:

  09.21: A 20.0 kg box remains at rest on a horizontal surface whim6bb-rl3tr: p4gd gha64mubc4)qk 5 p le a person pushes directly to the right on the box with a force of 6cmmb- b5l grtrhp 4upqk3da4)4b6 g :60N. The coefficient of kinetic friction 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 at 8 m/s accelerates uniformly to rest on a horili8,wh e0mjkr- dx6.qzontal surface. The block travels a distance ji ,60 wxq 8k.edlmr-hof 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 across a patch of ice at a speeca c8kl1fm*uy;)- ciho9pz:md v with its brakes locked. It then hits dry ohic-am: kup)*9y 1 cz; fcml8pavement and skids 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 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 with its brakesr+ uyx8baff7 +8b5mpp locked. It then hits dry pavement and skids to a stop in a distanced. The coefficient of kineti8x p5buf ybpf7+a r+8mc 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 shuhv*cyt 2a ip)-d ,j .9wl3datop by slamming on the car's brakes and skidding to a stop. How far would the car h2 hw-avlt3 ih* ycdd.,uapj9)ave skidded if it had been traveling twice as fast?

  99.39: The driver of an automobile tue d9*os qytdet;a4i6,vr31 must carefully control each of the following devices. Which of these devices can cause an acceleration in a mort id1 q;veuo* sy6,d3tae9t4ving car?
(1) the break pedal ( 2) the gas pedal ( 3) the steering wheel

  00.25: The net forcep t)u0b9s 9c euf)t.it on a rocket with a weight of 15000 newtons is 24000 newtons. About how much time is neede)uu 9s be.)ipt0ct9ftd to increase the rocket ’ speed from 12 m/s to 36 m/s near the surface of the Earth at takeoff?

  07.21: A box slides to the right across a horeudbwy p 2(ob7/n8ce 9izontal floor. A person called 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 accelerates to the right, rank the sizes o(/bd w7ben9c u2 8opeyf these three forces exerted on the box.

  02.27: The diagram below d*2))g+e ftdeg l +v0k9bucjlshows three roller coaster tracks of equal length. Assu+ed)l 2g+ujt )v0k dfgblc e9*me that on all tracks the 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 be traveling the fastest at the finish?

  02.28: The diagram below shows three roller coastert4 9k1t pie, jm)0bofy tracks of equal length. Assume that on all tracks the roller coaster carts start from rest at the same elevation and moves frictionlessly over t, t) p0ykj1 tiob9f4mehe 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 rollercoast3d5ikl0jj x,ker cartrolls frictionlessly along the curved track from point A to point C under the ,jlx 3kdj5 i0kinfluence of gravity. What would be the direction of the cart's acceleration at point

  02.40: A box with a mass of 50 kg is dragged across the uos he v)j/xuc5:*)y v5cw2rtfloor by a rope which makes an angle of 300 with the horizontal. Which of the following would be closest to the coefficient of kinetic friction between the box and the floor if a 250 newton force on the rope is required cv*/oyh s)x)e:2v5ct j5wr uuto 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 7v nbq(4ie fun.8 t :;k4hg gw0u*jay2yezwi3wall 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 block after a tt7:eii 0hy4ju (vwng2 .kye3 z4b*nawq8;gu fime of 1 second?

  05.10: A homeowner pushes a lawn mower across a horizontal patchf. 02 k6bbaxou 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 fol aku.b0o62fbxlowing relations among the various force magnitudes, W, f, N, P is CORRECT?

  06.14: A book leans against a crate on a table. Neither is moving. Whici e++iqdun c92:pw ss,h of the following statements cowps2u+,dn: s iecq 9+incerning this situation is CORRECT?

  06.15: A crate of toys remains at rest on a rkd0 v9 ,a*b*.7f ecah:upvqtsleigh as the sleigh is pulled up a hill with andv rva e*tub.fp7h0:k c,*aq9 increasing speed. The crate is not fastened down to the sleigh. What force is responsible for the crate’s increase in speedup the hill?