99.36: What happens to they+p(d k w4.9b1xzf1o 8 ydraam inertia of an object when its velocity is doubled?

  02.14: An intrinsic propert/aatg5d +ul*5 g yyy, jj:l)6xtlrg*ly of matter is one that does not depend on the quantity of matter present. Which of the following properties is NOT an intrinsicllg,+ j lx tg/j)r 6lyad5ta*5gy*: uy property?

  04.16: A 20 kg boulder rests on the surfacg ,vjd6;h-m pie of the Earth. Assume the Earth has massjpi6v; g,h-md $5.98 \times 10^{24} \; kg$ 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 th 5x0tpta,kpskzk2y1(z z,9 fle surface of the Earth. What is the magnitude of the gravitatit,z91xtsk(aklykz0p ,f52 pz onal 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 atu4+i)fs 7 y9 yshiir*cceleration sis yu4+ti*9yi)h f7rdecreases?

  00.11: A certain particles f:wgbs1o ta8.-1 jtb undergoes erratic motion. At every point in its motion, the direction of the particle’:obs.s8agbf1jw t 1t-s momentum is ALWAYS

  17.14: A block is suspended in the air aw -,/*k1sdgv)fbb1w8m zyg r lt the end of a 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,m-r /8l dg bzg)b1yk1svf *ww 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 situations is the net for )ve5ebok+qus2v i)gbyo8d- 0ce constantly zero on th)v5o-yi)o8db k +u 2vebgqes 0e object?

  13.28: An object is in free fall close to the ground. A person inte), ;hs n* 6yxw9eqoh3 h6dndsrrvenes 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 a;36 o ss)rh*d wyhh,6n9nqdex s 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 oj*6ai9iu :yild97q pb.+ zvhN, F2 of 50 N, and F3 of 70 N, acting on it. The magnitb a6+7iu.q olzdi 9h*jpv:y9iude of the resultant ofF1 and F2 is

  01.07: A force of 6 Np+rgqp6nvp il 30u,a ,ewtons and a force of 10 newtons can be combine to form a resultant with a magnr lpa+3,u0p,npq ig6vitude of which of the following

  10.06: Which of the following statements is m37p qd*2jku5qy rk f3aost closely associated with Newton’sfpqd2jr*33uqa7ky 5 k Third Law of Motion?

  95.06: The reaction force does not nit/ec2yg5e4 . qpsne09en1w cancel the action force because:

  14.14: A box rests on the floor of an elevator. The elevaq)e;+yd 5h3y e(hqeb ktor is accelerating upward. Which one of the following choices best represe e3b y+k;5qe(yeq )hhdnts 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 constant speed. n-20 sjui byfju,e-, *gozi3kWhich one of the following choices correctly describes the Newton’s T2sokjine uz*ij0,3yg-bu-f ,hird Law pair force to the air resistance acting on the skydiver during the fall?

  06.08: A baseball is thrown by a pitcher with a speed of 35 m/s. 9ofnku36+ 6 slo v 57jtjmzeeu3qj+i+The batterswings and hits the ball. The magnitude of the force thatk75vun6ol3u9m tjfs+j i +6zoq e+je3 the ball exerts on the bat is always

  11.13: A physics book 6rl tq0l l1u+cee.h7j sits at 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 table exerthlc7r .6e0je+ ll1quts on the book?

  05.06: The students in a Physics I class were in lab conducting an expef7i3ajpkn)orvr 60r5 riment related to Newton's Second Law. The collected datakr6705r ri an3 jov)fp 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 objectuhb.89 cb 2hhd were doubled while at the same time the mass of the object was halved,then the ach8c hbhud.9b2celeration of the object is

  96.15: A car whose mass is 1500 kg is accelerated uniformly from rewbovl+,1hc;x st to a speed of 20 m/s in 10s. The magnitude of the net force a,lvo b+ ;wc1xhccelerating the car is:

  99.05: A tractor-trailer truck is traveling down the road. The mass of t g/y/lckv 2xvf54hi0 rhe trailer is 4 times the mass of the tractor. If the tractor accelerates forward, the force that the trailer applies on 5/xhvg l cvy4kri/0f2the tractor is

  99.16: Which of the following principles best explains why largex hjf2gp)/l 4g tractor-trailer trucks generally accelerate much more slo l/jh4)g fxp2gwly that automobiles?

  99.19: A 50 kilogram skater at rest on a frictionless rink throws a 2 kilograwrbvx(z6srx ai a/8;6 m ball, giving thb6r6aw;8zr x a(/sivx e ball a velocity of 10.0 m/s. Which statement describes the subsequent motion?

  00.13: An object near the surface of the earth with a g rtc+ hl ; od62hx,bpxi85v7rweight of 100 newtons is acceleratedgdh2xv i 78; +hlpbo6 trxrc5, at $4\;m/s^{2}$ . What is the net force on the object?

  98.25: A car whose mass is 1200 whs2ay2f(l9x5hsa/dyc*of 8 kg is accelerated from rest by a constant force of 2400 N. What is the speed of the car 8.0 s 9*/cx oyfswhfa l85dy2(2ashafter beginning?

  98.32: A 3.0-kg block 4hjhtf * 48u v(vqje3gwith initial speed 4.0 m/s slides across a rough horizontal floor before coming to rest. The frictional forf(j h4qvt*3huev4gj 8ce acting on the block is 3.0 N. How far does the block slide before coming to rest?

  95.38: A block with initial velou.+b se7k-duwdo 1go ;city 4.0 m/s slides 8.0 m across a rough horizontal floor before coming to rest. The coeffwo g+eb- u;7ud dok1.sicient of friction is:

  09.21: A 20.0 kg box remains at ret+p:lacd;oex*(*, il r h(cnjst 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 surfe +,lac*;ixj ho:drtpn((cl *ace 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 oc/ c,dg:+coxb,z :n szn a horizontal surface. The block travels ,bcg+ nccz /:, dxzos:a distance of 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 paor,x,:ur7; *j m+j :csjrlfjttch of ice at a speed v with its brakes locked. It then hits dry pavement an,x+rjr*tmlr :co :j;sf ,u7jjd 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 wvkgoux:n4 qww)/ )4i+t sb;kxith its brakes locked. It then hits dry pavement and skids to a stu 4s+/bon 4x iw: w)kqxg;v)tkop 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 eeblcx qa+ ypc 11x,43by slamming on the car's brakes and skidding to a stop. How far would the car havebycca4 ,xex31e+ q1pl skidded if it had been traveling twice as fast?

  99.39: The driver of an automobile must carefullyb,c-(z(qdqvv ax((f( l ys4qf control each of the following devices. Which of these devices cany,(qqvcb d(z s lf-q(xa(v f4( 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 of 15000 newtons is 240000oyb5jl /brgj .q2 ft9 newtons. About how much time is needed to increase the rocket ’ speed from 12 m/s to 36 m/s near the surface of the Eart .gflbtj59yr 2/0 obqjh at takeoff?

  07.21: A box slides to the right across j8p3 jdji 4v,ea horizontal 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 of these three forces 4e3jjj8dv,pi exerted on the box.

  02.27: The diagram below shows three rol*x n f(qer8,ny, d(.e ykjogy3m(zc0h ler coaster tracks of equal length. Assume that on all tracks the roller coaster carts start from rest at the same elevationemenq8 0rd.,kh ,( jyy (z3gn* fcoxy( 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 ae*(,e mj3gfw 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 tracks to ,*em3wa (ef gjthe 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 frictionlessly along the curved trac j fyc,x/+el1oon9mq3. m e 42dd92 fc8nvzzdxk from point A to point C under the influence of gravity. What would be the direction of the cxqe8 cz2n fzvmod+9e2l.13jdf, /9yncxmo 4dart's acceleration at point

  02.40: A box with a ma +0jljp). nawoss of 50 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 250 newtonnaj p0)l .w+oj 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 rest is pushed agam 6vbkrnrkdn:6j9h 95inst 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.mhdnj:k9r vk59b6 n6r What is true of the friction acting on the block after a time of 1 second?

  05.10: A homeowner pushes a lawn mower across a horizontal patch of grass with ahu/ -ttt918w;5stz0 len qhvp 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 th- nlt 89the 01t/vszq5h;p wtue following relations among the various force magnitudes, W, f, N, P is CORRECT?

  06.14: A book leans agaf 1wftwi8h 2/ainst a crate on a table. Neither is moving. Which of the following statements concerning this ww1thia82f f/situation is CORRECT?

  06.15: A crate of toys remains at rest .ry h4 3h*xbd t,rox9ton a sleigh as the sleigh is pulled up a hill with an increasing speed. The crate is not fastened down to ththxhr3o.9 *yx b,dt 4re sleigh. What force is responsible for the crate’s increase in speedup the hill?