97.01: A force F directed at an angle of θ above the horizontal is used tcq *q 2rrp8 w*-ogqnlb3* efq2o pull a crate a distance D across a level floor. The wore*lq frbqng*3 *r c-w2qpq2o8 k done by the force F is

  97.33: A softball player catches a ball of mass m, which is moving towarsi*;5grq usmct khk4d 1+f64nd her with horizontal speed v. While bringing the ball to rest, her ha4hkukic+;nqf1 6g smr5t4 s*dnd moves back a distanced. Assuming constant deceleration, the horizontal force exerted on the ball by her hand is

  99.14: A construction labfw.0e/bgl,fpw9 r j-s orer holds a 20 kilogram sheet of wallboard 3 meter above the floor for 4 seconds. During these 4 secondshow much power was expended on the wallbos /e.g9jl-fbwfp ,wr0ard?

  17.11: A 5.00 kg bl wc*62b+*hms w b)ir3tw2fubz ock slides with uniform acceleration on a horizontal surface for 5.00 s. The block’s kinetic energy strictly decreases from 50.0 J to 20.0 J in this timbf zuw23 6cbmw*w+ i)2bshr *te.
What is the average speed of the block during the motion described?

  17.12: A 5.00 kg block slides with uniform acceler441eu .82tmf-k/mm o ifgvhxuation on a horizontal surface for 5.00 s. The block’s kinetic energy strictly decreases from 50.0 J to 20.0 J in this time.iumetv8f m4-m/4 gfk ho2u1 x.
Which one of the following choices best represents the magnitude of the block’s acceleration during the motion described?

  16.11: A 12.0 N net force directed to the rig usy l cg(.q)(ybhss h3h0.yvh+4:jsh ht is exerted on a 3.0 kg block for 5.0 s. The block was initially at rest and slides on a horizo :sjh4sq+ushcy.yh)gh3(.(hy lb 0svntal surface.
What is the speed of the block at the end of the 5.0 interval?

  16.12: A 12.0 N net force directed to the right is 0 u0 cokipviwp;2m; k5exerted on a 3.0 kg block for 5.0 s. The block was initially at rest a uic5;i m2vkpko0pw 0;nd slides on a horizontal surface.
What is the kinetic energy associated with the block after the 5.0 interval?

  00.15: A student initially at reston a frictionless fr,qvfz -3tc o/qozen pond throws a 1 kg hammer in one direction. After the throw, the hammer moves off in one direction while the student moves off in the other direction. Which of the following correctly describes the above situation?foctqz,-/q3v

  03.14: A fan blows the air and gives it kinetic energy. An hoqtd0apmo7(b xp7/(b l dk g+9pur after the fan p+(9k(ddbg 7mpl axt0op b7q/has been turned off,
what has happened to the kinetic energy of the air?

  09.05: At an instant, a block of mass 0.50 kg has a position of 3.0 m, a s-1yv --;mz/ den( dcft honc. u4)ovnlpeed of 4.0 m/s, and an cny)oo-hd(z nt/df v4-.l;eu1cn -m v acceleration of $1.0\; m/s^{2}$ . What is the kinetic energy (in Joules) at this instant?

  05.05: A box of old textb,p t--ela o0 o2kwj-q sw5s-lfooks is on the middle shelf in the bookroom 1.3 m from the floor. If the jaljkl- o- fetp-osw0 as2-5qw, nitor relocates the box to the shelf that is 2.6 m from the floor, how much work does he do on the box. The box has a mass of 10.0 kg.

  02.32: An automobile engine delivers 24,000 watts (about 32f)wnpsm q-g- /8oxl1 k horsepower) of power to a car's driving wheels. If the car maintains a co )k-wq/olnp xms-8fg1 nstant speed of 30 m/s (about 65 mph), what is the magnitude of the retarding force acting on the car?

  09.13: In the figure to the right, a box moves with speed 55;w o .n3y 8qmapccyv5.00 m/s at the bottom of a rough, fixed inclined plane. The box slides with constant acceleration to the top of the incline as it is being pushed directly to the left with a constaovccq .mpa55;wn3 y8y nt force ofF = 240N. The box, of mass m= 20.0 kg, has a speed of 2.50 m/swhen it reaches the top of the incline.
What is the magnitude of the acceleration of the box as it slides up the incline?

  09.14: In the figure to the right, a box moves with speed 5.00 m/s at the bottom k6h6kic pak y;mfel5v55yz72 z0e5vb of a rough, fixed inclined plane. The box slides with constant acceleration to the top of th i55lfp6e kk;kz vv 5c5h7yaeb z2my06e incline as it is being pushed directly to the left with a constant force of F = 240N. The box, of mass m= 20.0 kg, has a speed of 2.50 m/swhen it reaches the top of the incline.
How much work is done by the applied force F to the box?

  11.30: Two cars travel to the rihmt-m 6l 2qekuvjv 3+4ght, each starting from rest, along a straight roalm-h 4+u62vekqv 3tmjd. CarA has twice the acceleration of Car B. After traveling a distance F, Car A has speed B. When Car B has traveled the same distance F, what is its speed in terms of B?

  12.07: What is the net force acting on)qmb rvs):3bbu +,dh i the object during the time interval of the accelerahmsqviu bb, 3d r:b)+)tion?

  12.08: Through what distance does the object move during the time interval of xate0 bfn 31.pgy jt80the acy.0 xtet b jgpf81a30nceleration

  12.19: The magnitude opwe8n+3vs 4./vkpo dv6 sk z0tf the linear momentum of a 4.00 kg point mass is changed from 6.00kg.m/s to 14.0kg.m/s in a time interval of 6.00 s. What is the change in the kinev8.6 now3dvk+t/ sep0 zkvp4stic energy of the mass during this time interval?

  14.11: A crate gains 36.0 J of kinetic energy while its speed is iv-fnc 6s3fkssa 6 v+mp 5*/:ceruw(og ncreased from 2.00m/s to 4.00m/s. Which one of the following choices besto-s f3 +5: wk6mpncgc(a*v rs/ue6vsf represents the mass of the crate

  94.38: A force F at an angle θ above the ho ;nk z/q)c.ggqrizontal is used to pull a heavy suitcase of weight mga distance d along a level floor at constant velocity. The coefficient of friction between the floor and the suitcase is μ. The work done b.k)qngcg z/ ;qy the frictional force is:

  14.31: A toy crane exerts an upward force and deliverso lmomjn i-p+z4+c4:f a useful power output of 0.10 w to raise a block vertically a mcf 4lmoz:in+4+o-j pt a constant speed. At what constant speed will this crane raise a 0.20 kg block?

  12.18: A 1.00 kg object is released froqob1i ah x-v(8m rest near the surface of the Earth, the gravitational force acting on the 1.00 kg object by the Earth does 10.0 J of work on the object as it falls 1.00 mto the ground, which one of the fol8-bx qvh1o( ialowing choices best represents the amount of work done by the gravitational force acting on the Earth by the 1.00 kg object during the fall?

  96.18: A rubber ball is held motionless a height ho above a hard flhdgq /a23h sbb znyfb5y 2s e53)iie10h gv9:woor and released. Assuming that the collision with the floor is elastic, which one of the following graphs best shows the relationship between the total energy E of the ball and its height h above the surface?e)a :2fdbwq59hbvsghhn0syi32/1e yib 3 zg 5

  07.06: A 500-kg car is moving at 28 m/s. The driver sees a barr8qfi ml 3ffpj.c*y0mps:ln ks 33ke 13ier ahead. If the car takes 95 meters to come to rest, what is the magnitude of the minf8imfp3psk0ks : 1jllqn .em* yc333fimum average net force necessary to stop?

  00.26: A 500-gram ball moving at 15 m/s slows down uniformly ur4hec9bq1k wd,xw t1,ntil it stops. If the ball travels 15 meters, what was the average net force applied while it was coming to 1 cbwwhxq, tr9d ,4ek1a stop?

  02.26: Consider two laboratory carts of differ ,fm d,a0:xtanoh8,r gent masses but identical kinetic enahx,8a, mg,:orfdt0 nergies and the three following statements. Which of the above statements would be correct?
I. The one with the greatest mass has the greatest momentum
II. The same impulse was required to accelerate each cart from rest III. Both can do the same amount of work as they come to a stop

  06.19: A 60.0-kgball of clay is tossed vertically in the air with a9w wp ys))t/+e6pqh8kj ,n mfun initial speed of 4.60 m/s. Ignoring air resistance, wham n)8 /q)w9fys6+ khe,putpw jt is the change in its potential energy when it reaches its highest point?

  06.20: A boy jumps from rest straight upward from a flacp d5o d/h.y(w3)s iqpt, stationary concrete surface. The boy, of mass M, leaves the concrete surface with speed v and his center of mass rises a distance d to the highest point of the motion. How much physica.dd pop/5 sqyc (h3)wil work did the average normal force of contact (N) between the boy’ s feet and the concrete do on the boy?

  02.48: An object of mass M is dropped from aheightH above the groulw ttag1u/z2*f: ;((kddweh nnd. The object crashes into some soft earth and comes to rest by compressing the earth a distance of H/2. Assuming that air h:*az2gt1fw dk(n (lt / e;wduresistance is negligible, what is the magnitude of the average constant force exerted by the ground on the object while coming to rest?

  12.48: An object of mass M is dropped from aheight H above the ground. The objn)s.- i f g)a s;0xgtmwq-d5asect bounces off of a horizontal surface in a collision lasting time T. The object then rises upward to a maximum height H/2. What was the magnitude of the average net force acting on the mass during the coll;ssad g50migwx q.-atn-)sf )ision with the surface?

  96.38: A pendulum bob mass mon a cord length L is pulled sidewaye5mx-7cwl a9s s until the cordm5x7ew- a9c ls makes an angle
θ with the vertical as shown in the figure to the right. The change in potential energy of the bob during the displacement is:

  03.49: A sled slides up a uniform incline of unknown anglr983xv iq3ze,; gf zhcfq)s5c e. The sled, which started at the bottom of the incline moving at 10.0 m/s, rises to a height of 3.30 m above its starting positsg xc)evqzfzc 3i, r;f95h q83ion and momentarily comes to rest. The sled then slides back down the hill. What is the sled's speed when it returns to its original position at the bottom of the hill?

  06.09: A deliveryman moves 10 cartons f(ms;ywchan 0o 2/-rcp,tqqe 8rom the sidewalk, along a 10-meter ramp to a loading hsocr8/am-(w 0t;y,enc2qq pdock, which is 1.5 meters above the sidewalk. If each carton has a mass of 25 kg, what is the total work done by the deliveryman on the cartons to move them to the loading dock?

  12.16: A constant force F=5zfrf djf- ur(4jq8 -t(fe4v- u0N (as shown in the figure) is applied for the 6.0 meter motion of the box upward along the incline. The mass of the block is M=15 kg. Which one of the following choices best representsf4r4jv z8(ffud q tefu-jr- (- the work done by the force F onthe box for the motion?

  04.48: Two identical bowling balls A and B are eack3:hc2aqw2qhns : qv75:k x xch dropped from rest from the top of a tall tower. Ball A is dropped one second before :wx: kq:h2q 2n5c3kvaxhscq7 ball B. After ball B is dropped but before ball A strikes the ground, how are the mechanical energies of the two balls changing?

  11.28: A person throws an object of mas0my98, wvjdp eqit9x:;w,mpe8r nvc9s M straight upward with an initial non-zero speed v. The object rises to a maximum height H above the launch point. The person now throws an object of mass 0.5M straight upward with initial speed 2v. In terms of H, to what maximum height does the object of mass 09j8w :v;ype r,it pdm9xv9qc nem,w 80.5M rise above the launch point? Ignore air resistance.

  96.20: A force of 10 N stretches a spring that slxfvz-3 )lm; has a spring constant of 20 N/m. The potential energy stored in the spring sl lfxm3)-v;zis:

  97.10: A compressed spring has 16 J of potential +y i*es24tqatp5bow5 energy. What is the maximum speed it can impart to a 2tti w+*4oab5q2 sey5p.0-kg object ?

  

  10.31: An object of mass M starts from rest at the bottom of a fixe jc+jk flt kuzn6;v0;,d incline of height H. A person decides to push the object up the incline in one of two ways with an applied force shown in the diagram. In each of the trials, the object reaches the top of the incline with speed V. How would the work done by the person on the block compare for the two trials? Assum6nju;ktk vzj,fl0+ ; ce the same constant non- zero coefficient of kinetic friction between the incline and the object for both trials.