99.36: What happens to the inertia of an object when its veloc5 (2t,zthf tqx:x5s znity is doubled?

  02.14: An intrinsic property of matter is onez 5v(qdi j5q-q that does not depend on the quantity of matter present. Which of the followingq(qd-i5vq 5j z properties is NOT an intrinsic property?

  04.16: A 20 kg boulder rests on the surfacxt;an:.4mxbegq5e ; me of the Earth. Assume the Earth has masxe .b4n xmgmq;at;e:5 s $5.98 \times 10^{24} \; kg$ 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 fre* a hjl9qn1+vye fall near the surface of the Earth. What is the magnitude of the gravitational force a+l1qy*vnajh 9 cting on the earth by the sphere? The Earth mass is $5.98 \times 10^{24} \; kg$ .

  00.09: Is it possible dx;mlpn ((ul,for an object’s velocity to increase while its acceleration decrea ,xlm(pdun( ;lses?

  00.11: A certain par9d/89vy;v py/dso aa jticle undergoes erratic motion. At every point in its motion, the direction of t;vy9 y/js/a9adpdvo8he particle’s momentum is ALWAYS

  17.14: A block is suspended in the air at the end of a sc+du;g uyq o( 57fz 35c;fucfgtring 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 identifc3 f+; uuzcoq75dc;f g 5gyu(fies the Newton’s Third Law pair force to the force of the string on the block?

  07.18: In which one of theyf*3i)k ac9 uz following situations is the net force constantly zero cui *9 ya)k3zfon the object?

  13.28: An object is in free fall close to the ground. (88 hwx dlr/ge,p dq0cdvr8+r A person intervenes and slows the object uniformly to rest. Which one of the following statements must be true about the magnitudvrr+ x0eqhd8d/rg(8 lcp ,d8we 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 acceleration from gravity is g.

  98.03: An object in equilibrium has three forces, F1 of 30 N, F2 of 50 N, and F xvjnh,a8xo/aj)ea, 7 3 of 70 N, acting on it. Thx/ nav7ex ,,a)oa8h jje magnitude of the resultant ofF1 and F2 is

  01.07: A force of 6 Newtons and a force of 10 newtons can be combinzckrra:r 7x55y f;nk /e to form a resultant with akk75yr; rzfc r5/x:na magnitude of which of the following

  10.06: Which of the following statements is most clo,f 6-gvphc. oxsely associated with Newton’s Third6cvgp,ox f- h. Law of Motion?

  95.06: The reaction force ) oz2axql7f) fdoes not cancel the action force because:

  14.14: A box rests on the sax)ca1q 29s ffloor of an elevator. The elevator is accelerating upward. Which one of the folla9sx)1 fqa2c sowing choices 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 a n,7kp;8. izbxd cz 16k+upfaqir with constant speed. Which one of the following choices correctly describes the Newton’s Third Law pair force to the ai pb .+zqkfk87pcizx un,;16 adr 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 batjtq:ar/p, s*5zjq+ftterswings and hits the ball. The ma +t:f ,szq*t5 qr/jajpgnitude of the force that the ball exerts on the bat is always

  11.13: A physics book sits at rest on a table. On top of the b,;ut ty8osh0n- 4tsk)d2rd 8 +jyuubp ook is a calculator, also at rest. Which one of the following choices is the Newton’s Third Law pair force to the force that u,hoybdu j-s+ ;8s4dny0kup2 8)rt tt the table exerts on the book?

  05.06: The students in a Phyka b(b ly5g: .z3hgr,wmyo z(9sics I class were in lab conducting an experiment related to Newton's Second Law. The collected data were displayg mkzh,w9b:5rz.3 o(a bylg (yed on the graph at the right. From this graph, what conclusions can the students make?

  99.03: If the net force on an object + v+ 7 wme(:immlhi2st8xry )xwere doubled while at the same time the mass of the object erxht(mm i y8+l+2vxi:s7mw)was halved,then the acceleration of the object is

  96.15: A car whose mass is 1500 r4vq a8(zdg7u kg is accelerated uniformly from rest to a speed of 20 a (g8druz47qv m/s in 10s. The magnitude of the net force accelerating the car is:

  99.05: A tractor-trailer truck is travellsrwi,/44 h eting down the road. The mass of the trailer is 4 times the mass of the tractor. If the tractor accelerates forward, the for44e, rshi/ltw ce that the trailer applies on the tractor is

  99.16: Which of the following principles best explain xjn,z0s.e uu)4 p6(gtbo u 1xqgdmz+fw03e -rs why large tractor-trailer trucks generally accelezznuqr +6p)u.de40 -0ws jmg1,x etxfo3ubg(rate much more slowly that automobiles?

  99.19: A 50 kilogram skater at rest on a frictionless rin-hwko4mohte*/pl3q n6 + y5q6kqd iw-k throws a 2 kilogram ball,q 6ql- mqdy4koon/6w 3h i+ -e*h5wptk giving the ball a velocity of 10.0 m/s. Which statement describes the subsequent motion?

  00.13: An object near the surface of l 5vna 9bsm( yrew6 g)w. m4)7,meucmithe earth with a weight of 100 newtons is accelerated a c.7s9wme)), by gmm(v56mi4nl reawut $4\;m/s^{2}$ . What is the net force on the object?

  98.25: A car whose mass is 1200 kg is accelerated from rest fru)) n)yf6t4h9 z*wf,q ird5 r eiape j)lc.5by a constant force of 2400 N. What is the speed of the car 8.r4aee*i6.r i l)pw)ruh5zfyc9j) qdf ,tn)5f 0 s after beginning?

  98.32: A 3.0-kg block with initial speed 4.0 m/s slides acros3j17-a x 1r chfjfeyh 1yse(d*s a rough horizontal floor before coming to rest. The frictional forceeyh a x11f( 7hcy-3j*jd1 fser acting on the block is 3.0 N. How far does the block slide before coming to rest?

  95.38: A block with initial veloce; z 0c; q5hddwlakbm lx0+tvg/, p+9vity 4.0 m/s slides 8.0 m across a rough horizontal floor before coming to rest. The coefficient of friction is:vv wg +ktmepq+0bz ;x/;d hal0 c,d59l

  09.21: A 20.0 kg box remains at rest on a horizontal so-jot s17gsy/y j92heurface while a person pushes directly to the right on the box with a force of 60N. Thesj2o/t1 7g- o9yshyje 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 uniformjr8 h,cq .7iehly to rest on a horizontal surface. The block travels a distance of 12.0 m during the slide. Which one of the follr, je7h h8c.qiowing 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,3pm1 wl wb5rk ice at a speed v with its brakes locked. m31bwlw,pkr5 It then hits dry 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 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 withm0cirt; 3t -4ea/t rhe its brakes locked. It then hits dry pavement and skids to a stop in a distanced. The coefficieneh;a/ite t4rm t rc0-3t 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 emergsaef1 js-i.z2 ency stop by slamming on the car's brakes and skidding to a stop. How far would the car have sj as1s ize2-f.kidded if it had been traveling twice as fast?

  99.39: The driver of an automobil lm04 p68ma hsqtpks/9lf0c*(y uxhm*e must carefully control each of the following devices. Which ohk/alhm 4l ut8 cx m(f*m0s6s09y*pp qf these devices 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 weight lx ,rv*t 3t*b*a(yd rsof 15000 newtons is 24000 newtons. About how much time is needed to increase the rocket ’ speed fromt( bx sayrtvr3l*,d** 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 horizontal floor. A person called T5e6;p j v0gekep1 :cgw(eh4mw ed 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 t(:wegmw04h kjeevgp5 p 1 ;6cehat 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 coaster8m0(a(h h lt3jyu(v/mft me9i tracks of equal length. Assume that on all tracks the roller coaster carts start from rest at the same elevation and moves frictionlessly over the tracks to the finishmvfhy i 3/a9et8ul(tm(0jm (h.
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 st7)j)rd(gqc shows three roller coaster tracks of equal length. Assume that on all tracks the roller coaster carts start from rest at the same elevation and moves frictionlessly over the tractsd)(j g c7qr)ks 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 frictionlessl tauh.fxl7lt)gf6670ab aj ue*:a h2w y along the curved track from point A to point C under the influence of gravity. What would be the direction of the cart's acceleration at ub7awl ga xt:hh2a)ufja .7 0t66lfe*point

  02.40: A box with a mass of 50 kg ym 0u/881oolcbmv-p -fa;/0d ppx0f h crg-sais dragged across the floor by a rope which makes an angle of 300 with the horizontal. Which of the following wouldl0r1ma;coha 8 -yfs-dvb p p8o0cu -mx //gf0p 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 crate at a constant speed of 20 m/s as shown in the diagram?

  04.40: A 6.0 kg block iniste- ixqdbo6u/1v:n( h*4o gttially at rest is pushed against 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 fri so dtv 1t4e:u q/x(*ghi-6nobction acting on the block after a time of 1 second?

  05.10: A homeowner pushes a lawn mower across a horizontal patch of grass w;hky .qze c qx.)kfpb7n9-5pfith a constant speed by applying a force P. The arrows in the diagram correctlf 9kb-fcpzny .k;. q xhq5e)7py 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 against a crate on a table. Neither is moving. Whic*lz .9l2ktoll h of the following statements concerning thiskzotl9. 2l*ll situation is CORRECT?

  06.15: A crate of toys remains at rest onfew 4 9vxlk*; 2w7syvq a sleigh 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 for the crate’s increase in speevk9lf w;7x*y4es qw 2vdup the hill?