99.36: What happens topi,hs:3mlc/ /8)lwmqb4c nj a the inertia of an object when its velocity is doubled?

  02.14: An intrinsic property of matter is one that does not depend o cv q9 q (xjf(3sutw)x9fwh11on the quantity of matter present. Which of the following properties is NOT an i x()tqc 3(w91qvu1w sj 9fxohfntrinsic property?

  04.16: A 20 kg boulder nnq4-a.zpp)crests on the surface of the Earth. Assume the Earth has mas.qpn)4pca-z ns $5.98 \times 10^{24} \; kg$ 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 thefg+ 7+p-kzpqg surface of the Earth. What is the magnitude of the gravitational fp-z f q+7pg+gkorce acting on the earth by the sphere? The Earth mass is $5.98 \times 10^{24} \; kg$ .

  00.09: Is it possible for ap1av7,tx nh p7;u 9pvmn object’s velocity to increase while its acceleration decrevpxpp7t;nu 9v, h7 1maases?

  00.11: A certain particle u39:l1xk dtmn: ckt2 0c.*jqwvqu 2cf andergoes erratic motion. At every point in its motion, the direc0fkwmuq9 c q:v1*nc2:2jx.dk l3ctta tion of the particle’s momentum is ALWAYS

  17.14: A block is suspended in the air at the end of a :q1bz*d exu u)/kamt.string 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 correctdba k.*ux/ )tzue 1:qmly identifies the Newton’s Third Law pair force to the force of the string on the block?

  07.18: In which one of th(try/nr c. lh0ig*sm8e following situations is the net force constantly zero on the objec m8h/ .0n rygs*(ticlrt?

  13.28: An object is in free fall close to the ground. A person intervenqy8. -enl0o 4u+a(pdghxn4t v es 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 the48e d+q . nuna togxy4(hl0-pv acceleration from gravity is g.

  98.03: An object in equin6y0 6qsi (x2 mc7mysqlibrium has three forces, F1 of 30 N, F2 of 50 N, and F3 of 70 N, acting on it. The magnitude of the resultantms 7i0 cq n(sq2mx66yy ofF1 and F2 is

  01.07: A force of 6 Newtons and a force of 10 newtons can be combine to form a rnxabin(ke 5k25k)a p6jby9 :aesultant with a magnitude oe25kiak5 ap: xj)bny 6an9k(bf which of the following

  10.06: Which of the following so)d4 kd4 ., msiix ;nnq-8jufhtatements is most closely associated with Newton’s Third Lawun4nx; 4mki dh f i),.odj-8sq of Motion?

  95.06: The reaction force docm:hth-da v/z fe2vabpr0f w5h7;/-ies not cancel the action force because:

  14.14: A box rests on the floor of an elevator. The elevator is acceleratingjq .pgj.n fu co(/c)ls8 7/scg upward. Which one of the following choices best represents the Newfu).(l q8./ pcgsjg/csn cj7oton’s Third Law pair force to the gravitational force acting on the box by the Earth?

  15.15: A skydiver falls downward through twvj )avr1 r1,khe 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 skyd),v1 jr1v rakwiver during the fall?

  06.08: A baseball is thrown by a pitcher with a speed of 35 m/s.gl;f2vtfr sjw2zd-1uc v9,2 s The batterswings and hits the ball. The magnitude of the force that the ball exerts on the bat is alwaj us 1lrws,v2- f29 dg2c;ftvzys

  11.13: A physics book sits a*.m8dtz pp,d d/nyqb/t rest on a table. On 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 force that the tabqdp /,pd/my* d. zn8tble exerts on the book?

  05.06: The students in a Physics I class were in lab conducting an experwpjwbkvm 34c hbq o.) *k3i//yiment related to Newton's Second Law. The collected data were displayed on the graph at the right. From tmb4kwhjviqc o/.ky3/p *bw) 3his graph, what conclusions can the students make?

  99.03: If the net force on an u5:d qtm +.b 39d3wumk:caxsvobject were doubled while at the same time the mass of the object was halved,then thb mw53qc:d:+ td3smku9 . xuvae acceleration of the object is

  96.15: A car whose mass is 1500 kg is accelerated uniformly sant;lg gzb5/)/jk5 ys.w* fufo12 gqfrom rest to a speed of 20 m/s in 10s. The m 51sqonyzb ;l/ggsjw2. )5g*f/fa tukagnitude of the net force accelerating the car is:

  99.05: A tractor-trailer truck is travelinxg jeh7)u49 usldn4;to -rp1d g down the road. The mass of the trailer is 4 times the mass of the tracgu4- ;t1hs4odd rpxj)el 7 u9ntor. If the tractor accelerates forward, the force that the trailer applies on the tractor is

  99.16: Which of the following principles best explains why large traymx1u4f i7 w4vctor-trailer try xw74v1f4umiucks generally accelerate much more slowly that automobiles?

  99.19: A 50 kilogram skater at rest on az*7u9ol4f ej 74 )bw eyqv2 ddzc-y(mu frictionless rink throws a 2 kilogram ball, giving the ball a velocity of 10.0 m/s. Which statement describes the subsequenc* 9u efb7wmul ey4od )2zq(dy7v-4 jzt motion?

  00.13: An object near the surface of the3 .sqkiz3wjx v9q,l* c earth with a weight of 100 newtons is accelerated at 3wlxqki3*9q . zjsvc ,$4\;m/s^{2}$ . What is the net force on the object?

  98.25: A car whose mass is 1200 kg j3,+ pcn 8sy)ky;i0+tjsbynfis accelerated from rest by a constant force of 2400 N. What is the speed of the car 8.0 s after be3 fyky8 bs0),+ypji;jn+cstnginning?

  98.32: A 3.0-kg block with initial speed 4.0 m/s slides across a rou ly)qy9j xh-2tm:vx 6agh horizontal floor before coming to rest. The frictional force acting on the block is 3.0 N. How far does the block slide before coming to )ya6 -x9t:hxmvyljq2 rest?

  95.38: A block with inzrtyk/s ken. 3:c (b a*zq9y)qitial velocity 4.0 m/s slides 8.0 m across a rough horizontal floor bet)3 /c (.by:yzr ksenqzak* q9fore coming to rest. The coefficient of friction is:

  09.21: A 20.0 kg box remains at rest on a horizontal surface while a per j.skrc- g).ge fkz*1eson pushes directly to the right on the box with a force of 60N. The coefficient of kinetic friction between the box and the surfaceg1)e*ge-sr fz. c.kjk 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 hoyvus4 say+vf/x,d n1i9,wf+4 pf qe9wrizontal surface. The block travels a distance of 12.0 m during the slide. Which one wi4a/s +s9fv+w,p dv9qf yne4 ux ,1yfof 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 speed v with its brasc j2 t33bv5,5 /o tbbsgbpf w:u1+mhukes locked. It then hits dry pavement and skids to a stop in a distanced. The coefficienbtu:h3 1bc so ,fws2bbv pg/ 5tum+3j5t 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 vc a)*f(+nxk sn.y c0qof ice at a speed v with its brakes locked.f.*xck0 a(snn y)vqc+ 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 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 cqfsmmhu v sw: )uw4n o*tk,+8ah+2 *fpar's brakes and skidding to a stop. How far wkw)+ahu+msf nm*82,4v* utqp hw:fso ould the car have skidded if it had been traveling twice as fast?

  99.39: The driver of an ae y)zv4)wsfuh( /hl8y utomobile must carefully control each of the following devices. Which of these devices can cause an acceleration/hy48sh(yufezv l ))w in a moving car?
(1) the break pedal ( 2) the gas pedal ( 3) the steering wheel

  00.25: The net force on a rocke2.a 8bd i8l)hht pk6net with a weight of 15000 newtons is 24000 newtons. About how much k2nhdeipb8 8htl6. ) atime is needed 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 horizontal floor. A person called Tedc(gsb .zc5dw0 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 0( 5bz.wcgdc sfriction 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 lenhete2wj/;. m kgth. Assume that on all tracks the roller coaster carts start from rest at the same mhewk2 / etj;.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 showslat5ac10s1fr 09awe s three roller coaster tracks of equal length. Assume that on all tr 050wserlaa9c1s1 fat acks 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 reach the finish first?

  02.29: Assume the rollercoaster cartrolls frictionlea:lz5l v: knxj /o*)lfssly along the curved track from point A to pv /o:k:l jl f)a*5lnzxoint C under the influence 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 draggedsijf(/xe4+ a*) jkoyw9p 2nbp 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 250 newton force on the rope is required to move the crate at a constant speed of 20 m/s as s + jy ( bnif4ap9xjsp*)kwo2e/hown in the diagram?

  04.40: A 6.0 kg block initially at rest is pushed against a wall by (( y. 7us *k45xi)gmdjs q.trhqzlhrx;2oj9v a 100 N force as shown. Thecoefficient of kinetic friction is 0.30 while the coefficient of stah.o sj*uy(2(irg7xl rd hkm s;tx qj9q)z45v.tic friction is 0.50. What is true of the friction acting on the block after a time of 1 second?

  05.10: A homeowner pushes a lawn mower acrocg74 o eoy3r,i m;ub3fdr kya*j5g*r,ss a horizontal 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 force, oo*g7rg,*jr u435 ifrey;kym cda3b s 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. Which of ip0r *:ft/9q3ivhvmb the following statements concerning this situation isi0 9vfmb:vt/ * 3qpirh CORRECT?

  06.15: A crate of toys remains at rest on a sl 6ak0gmv87u qkeigh as the sleigh is pulled up a hill with an increasing speed. The crate is not fqg08mvu k a6k7astened down to the sleigh. What force is responsible for the crate’s increase in speedup the hill?