99.36: What happens to the inertia of an objecb3 7 -d*ad2lnvclfjj8t when its velocity is doubled?

  02.14: An intrinsic property of matter is one that does not depend on theu-4iu3yo3i dky 7d 8xa quantity of matter present. Which of the following proped oxa8 -kyui4 dui337yrties is NOT an intrinsic property?

  04.16: A 20 kg boulder rests on the surface of the Earth. Assume the Earth e7ckv8 r9s8u76a za8c3nppyp*0vaudhas mu6*8 prdva78c7 uzvs 3 0e9pna yap8ckass $5.98 \times 10^{24} \; kg$ 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 wc c-:ymzkm 16surface of the Earth. What is the magnitude of the gravitatiocc-6zwymkm 1:nal 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 its accelelzc,ex d9cw55 ration decrea ed5cw9zx 5lc,ses?

  00.11: A certain particle undergoes erratic motion. At every pouu0 f4j t 8j ih)xxc*msc/m2;nint in its motion, the direction of the particle’s mh2c; j4 sx x8u*c)t0 nfiu/jmmomentum is ALWAYS

  17.14: A block is suspended in the air at the end of a string held by a person. f* v mnjbrev7 (ic,h1,(spjp5 The person pulls on the string uniformly accelerating the block upward for 1bpvrv e,m i 5*jnh7sf,( (pcja short 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 situapkd25a xnu,kf- 8kuv1tions is the net force constantly zero on the objectupud,fkva1 k2 -k8x5n?

  13.28: An object is in free fall close to the ground. A person in,+l/s nmtop, lzkv6 mj t63h,,(l;ujho7r hmmtervenes and slows the object uniformly to rest. Which one of the following statements must be true about the magnjml,6l6om;v/,j+l3tzrm po hn7kh(tm, u,s h itude 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 50j+qyqepdyh ; :i: +dn) N, and F3 of 70 N, acting on it. Th+:e dyiqq dhj+ )n;yp:e magnitude of the resultant ofF1 and F2 is

  01.07: A force of 6 Newtons and a force of 10 newtofue7( 8 c bi,,yu2vlpxns can be combine to form a resultant with a magnitude oyebcfip 7u ,u2x( l,v8f which of the following

  10.06: Which of the following statements is most closely anj2df7 6ah (hgf ,sef6ssociated with Newton’s Third Law26hh 7fej dfafns,6g ( of Motion?

  95.06: The reaction force does not cancel the action forg f ::;hkqlxan2-wuf +ce because:

  14.14: A box rests on the floor of an elevator. The elevator is accelerating upgz4z ji3np; 1pward. Which one of the following choices best represents the Newton’s Third Law pair force to the gravitational force acting on thein 3 4;gj1ppzz box by the Earth?

  15.15: A skydiver falls downward : asb h 4og9u2fnghoz:aw3i,/ through the air with constant speed. Which one of the following choices correctly describes the Newton’s Third Law pair force to the air resistance acting on the skydiver during the azg2bi ,9gsf4o a :hw h3:ou/nfall?

  06.08: A baseball is thrown by apanh *1a b0m4u pitcher with a speed of 35 m/s. The batterswings and hits the ball. The magnitude oaa0bu4pnh * m1f the force that the ball exerts on the bat is always

  11.13: A physics book sits at rest on a table. Ouzw fi(.rq 8;7fv3d,19yvon ksub-nh n top of the book is a calculator, also at rest. Which one of the following choices is the Newton’s Third Law pair force to the forcu-v1,r y .(k s8n3hqdn7;uwf v9iobfze that the table exerts on the book?

  05.06: The students in a Physics I class were idyli l3h ,/m/e7gn0j d / y4)-pgwmplrn lab conducting an experiment related to Newton's Seconjgi,m0g d7n 4/lh mpp-yw/3de )lrl /yd 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 doub ;nrz ai6bbszqq-8t niib(t q3q(e (0-led while at the same time the mass of the object was halved,then the b (q8tqqa iii(3e-t b (bzr;z0n- qsn6acceleration of the object is

  96.15: A car whose mass is 1500 kg is accelr.v fb yma c2;ks+h.ra* q1,nierated uniformly from rest to a speed of 20 m/s in 10s. The magnitude of the net fory 2rb vf.1ismkrch.a +;* q,nace accelerating the car is:

  99.05: A tractor-traile, m7nmnuh +uf0r truck is traveling down the road. The mass of the trailer is 4 times the mass of the tractor. If the tractor amnu,n + m70hfuccelerates forward, the force that the trailer applies on the tractor is

  99.16: Which of the following principles best explains why large tsp998z5 s9w mn.vmzb r3wni7 bractor-trailer trucks generally accelerate much more slowlb9w37zz95vm b9msn s i rn8p.wy that automobiles?

  99.19: A 50 kilogram sxo;usk 96b.sbe.k3s c( yj:jskater at rest on a frictionless rink throws a 2 kilogram ball, giving the ball a velbsj.kkoj(3.;b c:u s96ess xyocity of 10.0 m/s. Which statement describes the subsequent motion?

  00.13: An object near tm ( ha6ls4 3fjh:a5vnjasihq/ ,e2(sphe surface of the earth with a weight of 100 newtons is accelerated vas3mel p:ihj/ qaf5(42s, 6(n ha jshat $4\;m/s^{2}$ . What is the net force on the object?

  98.25: A car whose mass is 120 nh1 y5iqv 6/52yilpgq0 kg is accelerated from rest by a constant force of 2400 N. What is the speed lygn1v5qq /6i yi2ph5of the car 8.0 s after beginning?

  98.32: A 3.0-kg block with initial speed 4.0 m/s sl0 8j4io teg; oymx/hbs+rv;a:ides across a rough horizontal floor before coming to rest. The frictional force acting on the bly+ro;o t0ms4ix8; va:b ejgh/ock is 3.0 N. How far does the block slide before coming to rest?

  95.38: A block with initial velocity 4.0 m/l 1up bbwlk.,pdv,ygr/- -,f is slides 8.0 m across a rough horizontal floor before coming to rest. The coefd ul1vwrpbl/.gf,k -ib,p-y ,ficient of friction is:

  09.21: A 20.0 kg box remains at restfrvo2hm6;x76j u)xc m on a horizontal surface while a person pushes directly to the right on the box with a force of 60N. The coefficient of kinetic friction between the box and the surface is;rcm6xj oh6xu2 m v7)f $\mu_k$ = 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 accele -*5im urj8kzf)-u kbirates uniformly to rest on a horizontal surface. The block travels a distance of 12.0 m during the slide. Which one of the following choices best represents the coefficient of kinetic friction between the s-r* bkk8uf-uz)i5jm i urface and the block?

  00.21: A car of mass m slides across a patch of i e/f4fe (heyryi0tao8(qt 8u *ce at a speed v with its brakes locked. It then hits dry pavement and skids 8ryt/haf8 ((y fie 40ueqeo*t 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 brakesp,sfw c9g1g6 a locked. It then hits dry 1sa9g cw ,f6gppavement 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 r mkp0n3uq9c( slamming on the car's brakes and skidding to a stop. How far would the car have skidded if it had been traveling 9 urp3(qmnkc0twice as fast?

  99.39: The driver of k:;yr w4pv.vfan automobile must carefully control each of the following vvr k f4wy.;p:devices. Which of 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 nepfp )d2+ qfv0j v9dxr*at5vwqq7 7, rocket with a 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 s 0*n9qfewd)v2vapfdtr xv, 7q+ p5jq7urface of the Earth at takeoff?

  07.21: A box slides to the right across a horizontal floor. Avz+ ..gr3jnr k- *r.nocylf1vx f2t.l person called Ted exerts a force T to the right on the box. A person called3jlrt n.2.c1f -lo+y k*gfz vr.xrv.n 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 of these three forces exerted on the box.

  02.27: The diagram below siaqxx9db6bq7v: si73 k7 hmd 8hows three roller coaster tracks of equal length. Assume that on all tracks the roller coaster carts start from rest at the same elevation and movbx67iha b8xq s i kd3dq977:mves 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 length. Avz bgwx;xp d/y4ou5/ )ssume that on all tracks the roller coaster carts sdvoz 4b/wux);yg/ p5xtart 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 cartrb9d1 anygw9 7s5leq5mq* /:jlp)u opw olls frictionlessly along the curved track from point A to point C uw/ q pqs:ywajg9eo dpn5 51lb* m)79ulnder the influence of gravity. What would be the direction of the cart's acceleration at point

  02.40: A box with a mass of 5w v*lc4hthef+7 ) hsm70 kg is dragged across the floor 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 ewh4sv hh cml*)77tf+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 re *c4wyq mmxr0gi8qdmmnk*ih7, h7k y4 0/z)vest 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 friction acting on the block after a tz 7hy4im,)i4 dh *0xqgm0ewmm 7vqrckykn/8*ime of 1 second?

  05.10: A homeowner pushes a.a l/ ea33ahuxpai*: f lawn mower across a horizontal patch of grass with a constant speed by applying a .af* pahi xe:aa/3u 3lforce 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 various force magnitudes, W, f, N, P is CORRECT?

  06.14: A book leans against a crate on a table. Neither is moving5yk 2k u0 jx-(wzvxy ;in8 qdfv/jl3g+. Which of the followivxxg 0fuyk5n;dlky- iw8vj/j(q 32+ zng statements concerning this situation is CORRECT?

  06.15: A crate of toys remains 1dx7l) rmudj+ at rest on 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 speedup the hilx l71m+rjd du)l?