99.36: What happens tot8o9xy;sks :v.9oo av the inertia of an object when its velocity is doubled?

  02.14: An intrinsic property of matter is one that does not depend on the quan9 m/twp 5zu7g4og,dqp tity of matter present. Which of the following properties is NOT an d/mw7pzgt 59g,oqup4intrinsic property?

  04.16: A 20 kg boulder rests on thef8+y+t ,ywjg*9 u u 8hlrwb;kq surface of the Earth. Assume the Earth has mass wfhq rg8w8k+*bu;lyuj ,+ 9ty$5.98 \times 10^{24} \; kg$ 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 sphezs7;9q*d,s feuk) 13u,ax u;mzuh dk are is in free fall near the surface of the Earth. What is the magnitude of the gravitational force acting on the earth by eku uhumzf da7kx;s,s z;a qd)*1,3u9the sphere? The Earth mass is $5.98 \times 10^{24} \; kg$ .

  00.09: Is it possible for an object’s velocity to increase while its acceler 34goop kshc4 w e9c4u,i)zw(bation decrease4o ) pbw3zi4(s4 ,w chcokgu9es?

  00.11: A certain particle undergoes erratic m+p p6 seh94 yj7xui 5px+h2pgcotion. At every point in its motion, the direction of the particle’s momentum icp25p+7 ex+xupj46yp hhg s9is ALWAYS

  17.14: A block is suspended in the air at the end of a ys3) :oxi j+ogstring held by a person. The person pulls on the string uniformly accelerating the block upward for a short time. During this time, which one of the following choices correctly identifies the Newton’s Third Law pair force to)o+sgij ox: y3 the force of the string on the block?

  07.18: In which one of the following situations is the n9tl)67wsoo u eet force constantly zero on the oeo 6 )l9utos7wbject?

  13.28: An object is in free fall e4 klq)r86f a/ bwh 6+z*jk 4hdkh.ju0g6bdbwclose 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 stopbkfwhdjhbe6lkw4d *g + 4j)au.k/hb68q z6r0ped by the person? The magnitude of the object’s acceleration is a and the magnitude of the acceleration from gravity is g.

  98.03: An object in equilibrium has three forces, F1 of 30 N, F2 of 50 N, andywdh7 1;yu4zsl z+jf6 F3 of 70 N, acting on it. The magnitude of the resultaw16+y4f jsluyd;h z 7znt ofF1 and F2 is

  01.07: A force of 6 Newtons and a b.6 ;8jcfwket(qak h+m(p z3 vmw)w;uforce of 10 newtons can be combine to form a resulta)b ctzw(mauwkqj6; fphmk;8w.+3v( e nt with a magnitude of which of the following

  10.06: Which of the following statements is most closely associbw 4 +qxdy7sa;8ae)yd:bo bq p:u 3*oxated with Newton’s 8dbpx )qas+a 4oxoyybd3*w b qu;::e7Third Law of Motion?

  95.06: The reaction force does not cancel the action fory m7a:hv9-b7y a:jf rece because:

  14.14: A box rests on the floor of an elevator. The eh n)mwuj81q8h nl4y h9levator is accelerating upward. Which one of the following choices best represents the Newton’s Third Law pair force to the gravitational force acting on the box by t9n84njqhwm1 hu lh)y 8he Earth?

  15.15: A skydiver falls downward through the air with constant speed. W:)5fdp4h-vi( d gl46n ic ylowhich one of the following choices correctly descri lv-ihwol4 ) ipfc y5ng46(:ddbes 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 pitcher 5uxup9jgfro; ,,, og cwith a speed of 35 m/s. The batterswings and hits the ball. ro9j x,p,u;gg c,5oufThe magnitude of the force that the ball exerts on the bat is always

  11.13: A physics book sits at rest on a khm,n:t h6 oy x6uv;-2ctfzt 6table. On top of the book is a calculator, also at rest. Which one of the following choices is the Nehu-tmf2zc6:ht vx;k6y6o,t n wton’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 experimentj ywb j,7 afe:ru4b8/p related t :uwy e ab4f7pr8j/b,jo Newton's Second Law. 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 while at the same ti3 g(m;uh,q yczme the mass of the object was halved,mg u(,z h;cy3qthen the acceleration of the object is

  96.15: A car whose mass is 1500 kg is accele+*z c s eimj ;l,e99zsn+t:jsjv/b 3eqrated uniformly from rest to a speed of 20 m/s in 10s. The magnitude of the net force n:b emczzsj vs9je;+jtls i/+3 e q,9*accelerating the car is:

  99.05: A tractor-trailer truck is traveling down the road. a3qj*/ :ejz xpf*i5x2ou2ksnThe mass of the trailer is 4 times the mass of the tractor. If the tractor accelerates forward, the force that the trailer applies on the tractor isxfjs3op kj iz*qn2a:u/ 25e*x

  99.16: Which of the following principx gt.su rk+:n4u5ebn3 les best explains why large tractor-trailer trucks generally +u sbe4xrkgnu3n. : t5accelerate much more slowly that automobiles?

  99.19: A 50 kilogram skater at )wd6c w bh* n0umi2*uirest on a frictionless rink throws a 2 kilogram ball, giving the ball a velocity of bnu wimuh )6iw *dc0*210.0 m/s. Which statement describes the subsequent motion?

  00.13: An object near the surface of the ea6):dhw yex(wg87tshx2 g7oz arth with a weight of 100 newtons is accelerated at (ysxgezx6owdha82w):7g7h t$4\;m/s^{2}$ . What is the net force on the object?

  98.25: A car whose mass is fu v kr;vl7p(98bv0cn 1200 kg is accelerated from rest by a constant force ofr l8 0vf9;(vub7 nkpcv 2400 N. What is the speed of the car 8.0 s after beginning?

  98.32: A 3.0-kg block wiszt)+7cgfqu k7/9 dwi dkl(:qth initial speed 4.0 m/s slides across a rough horizontal floor bef fksdl(d+wcq79 k)t7qg ui:/ zore coming to rest. The frictional force acting on the block is 3.0 N. How far does the block slide before coming to rest?

  95.38: A block with initial velocity 4.0 m/s slides 8.0 m acrj) /bpv:n a)icoss a rough horizontal floo pjv))ncb :ai/r before coming to rest. The coefficient of friction is:

  09.21: A 20.0 kg box remains at rest on a horizontal surfa39xbu gqsip4q u(+r:0lzn --n f0f,rytf ) bmkce while a person pushes direct-:+fuqkm btgrf 0,z9x3f4n0li)py bn urqs (-ly to the right on the box with a force of 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 acceleratev 7ksoqq(c* 0es uniformly to rest on a horizontal surface. The block travels a distance of 12.(0kc7s* qevq o0 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 spee*h, rs6)gka dcflv+n2+ r 9iydd v with its brakes locked. It then hits dry pavement and skids to a stop in a distanced. The coefficient o9 f2yh6d+srilr kgn ,a*dc+)vf 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 massb)er4p: xzw wras( wq* 7fp)/x m slides across a patch of ice at a speed v with its brakes locked. It then hits dry zr)ww xp 4p) awxqf/b(e:7sr*pavement 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 speed of 2v, it would have skidded a distance of

  04.32: he driver of a car makes an emergency stop by slamming on the car's braanaru96 q:n /qh2dfe;kes and skidding to a stop. How far would the car have skidded if it had been t eq2u6 adhf /nqnra;:9raveling twice as fast?

  99.39: The driver of an automobil4;cdggz em0x xgvh-/ fpe,s).e must carefully control each of the following devices. Which of these devices can cause an accelerat; hvcd -)/fgemxzxseg.g,40p ion 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 weight of 15000 newtons is 24000 qcx vg;)fng/ :p 5:wb5pog8akw9blb8newtons. About how much time is needed to increase the rocket ’ speed from 12 m/s to 36lo8pxn gbfbw 8g9;5 ): g :p5akwbcv/q m/s near the surface of the Earth at takeoff?

  07.21: A box slides to the right1u))e o wjjvnr9y .npta )5ei* across a horizontal floor. A person called Ted exerts a force T to the right on the box. A person called Mario exerts a vo)ywure 9)j a* i1.tjp)nne 5force 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 of these three forces exerted on the box.

  02.27: The diagram below shows three roller coaster tracks of equal len,-rwd simggu3jtj q * lta844))oici9gth. Assume that on all tracks the roller coaster carts start from rest at the same elevation angsiu 9m g4a 4* ol8r)t )q3jw,iidct-jd 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 mt1)p 15fr m5jv:nhah three roller coaster tracks of equal length. Assume that on all tracks the roller coaster carts star5p nmav)m :hh 11tj5frt 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 fr4: z,bffjyty 0ictionlessly along the curved track from point A to point C under the influence of gravity. Whafz04yf t ,:ybjt 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 floor by5-pzwmyhq*n b9o/*s evf-d::x i o z,8-fyty u 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 to move the crbzy f9 u,*qe::xfyi -owym5t n*o8-dv-/zshpate 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 xm9nck. d8(*8 7, kmlek.dgzovw.v nk9lztf3 a wall 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 *k gt,kd9.k7m.exl 8.z 3cnz vndlo( 9wv8f kma time of 1 second?

  05.10: A homeowner pushes a lawn mower across a hor r9tj/q g;z5(r8moj (do 4acbxizontal patch of grass with a constant speed by applying a force P. The arrows in the diagramodm t; obr(8 5qjrx/ac4 (zg9j correctly indicate the directions but not necessarily the magnitudes of the various forces on the lawn mower. Which of the following relations among the various force magnitudes, W, f, N, P is CORRECT?

  06.14: A book leans a ua6i ifa+)wt3gainst a crate on a table. Neither is moving. Which of the following statements concerning t3w aui+6af) tihis situation is CORRECT?

  06.15: A crate of toys remains at rest on a sleigh as the sleigh is puqj ),bhrz bay- 03)shalled up a hill with an increasing speed. The crate is not fastened down to the sleigqj30) y,-zh brhaa )bsh. What force is responsible for the crate’s increase in speedup the hill?