94.01: Starting from rest, obtl vvkj;j*c d+(v3b w4nmw2. aject 1 falls freely for 4.0 seconds, and object 2 falls freely for 8.04tj *lvc+3vwmjwv;b (2dn ka. seconds. Compared to object 1, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to a final spem4 jy(6x8bw bqed of 20.0 m/s in a time of 15.0 s. mw4qb byjx86( How far does the car travel during this time?

  94.03: A ball is thrown off a high uf6r7i yg,h n/ftto(+ cliff with no horizontal velocity. It lands 6.0 s later with a velocity of 40 m/s. What was thf6+u ort,gt/h iy7(nfe initial velocity of the ball?

  95.27: A rocket near the surface of the earth is acn;ag 1ksdf6,2wja +dncelerating vertically upward atkwdjg asd,f+ ; n6an21 $10\;m/s^2$. The rocket releases an instrument package. Immediately after release the acceleration of the instrument package is:

  95.13: A freely falling body is found n9w4mu y m:eoy +6q,vjto be moving downwards at 27 m/s at one instant. If it continues:4ujn+oq6v m y,9ym ew to fall, one second later the object would be moving with a downward velocity closest to:

  95.39: A car starts from rest and accelerates m2zu72 :ng09 fx 26hx dgcautsp ok2*vat $0.80\;m/s^2$ for 10 s. It then continues at constant velocity. Twenty seconds (20 s) after it began to move, the car has:

  96.17: A ball which is dropped from the top of a building strikes the g))ptvi,.dwr no1 k y61mio aue)v7,xr round with a speed of 30 m/s. Assume air resistance can be ignored. The height of the )ornd,ti7wi ox kram ) upv1.e), 1yv6building is approximately:

  97.09: At a certain time, an object in free fall has velocity 4.0 m/s i ee)ov)a)ah/q 0 gx3zdn the upward directiox)deza gv/ )a30qe h)on. What is the approximate velocity of the object one second later?

  98.14: How long must 9ga u96( 4 hfqnad,eoldsr a/0a $2.5\;m/s^2$ acceleration act to change the velocity of a 2.0 kg object by 3.0 m/s?

  98.15: A freely falling object is found to be moving downward at g8f:7p* fq9 b+k vd))sdwvx ,a /waylc18 m/s. If it continues to fall, two seconds later the object would bvls9k+bc*ad x))vwq8w d a/pf f:,yg7e moving with a speed of

  17.02: A small object is released from rbo :s3p-l dfc:,lya(iest and falls freely for 4.00 s until reaching the groun fp:3,b(:ll- aisdcy od. What was the height above the ground from which the object was released?

  11.06: A ball of mass =0.100 kg is ads,;c2)1trul m rd-alaunched straight upward so that it rises to a maximum height of 12.0 m above the launch point. Ignore air resistance. When the ball reaches its max tulamdac,r; ds12r )-imum height, which one of the following choices best represents the magnitude of the net force acting on the ball?
D 10.0 N
E 12.0 N

  11.07: A ball of mass =0.100 kg 5cud jkdl x-**puel7/ 3gvct: is launched straight upward so that it rises to a maximum height of 12.0 m above the launch point. Ignore air resistance. Approximately how much time does it take the ball to reach the maximum heivp-e jlu:3*t *c5ludx/gc7 k dght from its launch?

  98.31: An object sliding down an inclined plane has speed 0.40 mdzbqhvb 3 .(ie /a6y;edrbi)) /s two seconds after d iy) q). brzebbae6h/d3;v(i it begins to slide. Approximately how far does it travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m tower wit1gr unpex68ohgot6rx7 i7 i /7h a speed of 15 m/s. Coin II is drpx7g7x/i6egorn oh81tr7 6u iopped (zero initial speed) from the top of the tower 2.0 s later. Assume g is $10 \; m/s^2$. How far below the top of the tower does coin I pass coin II?

  02.04: If a ball is thrown directly upwards with ttn gme/y/) (wd0wdo .tp (x4giwice the initial speed of another, how much higher will it be((p0xdmne)/t gw4 wiyg/d.o t at its apex?

  02.30: A box falls to the ground from a delivery truck traveling at 30 m/s.mkoa0v 2a/4dzz-o6,x q a r5bc After hib 04 aao6o mczv,zrx2/k-5qdatting the road, it slides 45 meters to rest. How long does it take the box to come to rest?

  03.29: An object is thrown upwair03 ylh- 7ts )azg3mkrds with a velocity of 30 m/s near the surface of the earth. After two seconds what would be the direction of the displa0mtsk -gyl3zia r)h3 7cement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3 f)n v) avrd*v45ac4u7jz *pxjm) are thrown vertically upward with different velocities (1v, 2v& 3v respectively). The diagram indicates the mass and velocity of each stone. Rank from high to low the maximum height ofa*zn 7 v ))jpavc*d f4j4x5vur each stone. Assume air resistance is negligible.

  10.25: Two point objects v 70ihvoa(- d8s9 ttojare launched straight upward with identical linear momentum. Object 1 has mass M and reaches a max8a 790od- ij(hst vvotimum height H above the launch point. If object 2 has mass 2M, what is its maximum attained height above the launch point in terms of H ?

  04.28: A rubber ball bou tr2.(cwuk )zuml9f l8nces on the ground as shown. After each bounce, the ball reaches one-half the height of the b tru 9l)2f(l .czm8uwkounce before it. If the time the ball was in the air between the first and second bounce was 1 second, what would be the time between the second and third bounce?

  16.21: At 1.94 s after launch, a projectile in free fall achieved its mqmmta 2dfk p-c fs;2qzp0m4) *inimum speed during flight. If that minimum speed was 15.0 m/s, what was the projectile’s initial angle of d m2affm q);kt q4zcs*p2 m-0plaunch from the horizontal?

  05.02: A pebble is dropped from a high verticadnef/h5:, v: hexaw:f l cliff. The collision of the pebble with the ground below is seen 1.50 seconds after the pebble is dropped. With what speed df/v na:e::wx h,5ehf did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about the height of a parking garag 1e9;w btuuf5me. One student suggested that to determine the height of the garage, they simply had to drop tennis balls from the top and time the fall of the tennis t ub;ewfm915u balls. If the time for the ball to fall was 1.4 seconds, approximately how tall is the parking garage?

  05.07: A snail is moving along arq g.rj+cl8sol i( r:5 straight line. Its initial position is x0 = -5 meters and it is moving away from theoj: qr.l+csrgr5i 8(l origin and slowing down. In this coordinate system, the signs of the initial position, initial velocity and acceleration, respectively, are

  04.38: A small point-like object is pulled downwards if/0aahq zl- m7h1e4y0j ;rsgfdmo ), by gravity (down the plane of the page) but is constrained to exactly follow each of thejmilgar7s4 ,0-oq; h1e 0 h/f dma)zfy frictionless pathways shown. Rank these three paths from shortest to longest in terms of the amount of time (T) necessary for the object to be released from rest at point A and travel to point B. Assume that in changing direction that there is no loss of energy and that it takes negligible time.

  06.13: A rock is dropped from t-z-bxu0 01z9p6jfovr1 jt mznhe top of a tall tower. Half a second later another rocv1t1nz0 -jj mzzfb-6p0o rux9k, twice as massive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s along a track. The cart comes to rec4w* 9wzh(ovaa9 j6 iest after traveling 1 m. The experiment is repeated on the same t jwi9v9h 4 c6aze*woa(rack, but now the cart is initially moving at 1 m/s. How far does the cart travel before coming to rest?

  07.11: A cart is initially moving at 3lbxs/2ek4 o y 3xibk 6blyiwc:* a)q.0.5 m/s along a track. The cart comes to rest after traveling 1 m. The experiment is repeated on the same track, but now the cartks6x4lyy) . qoki2b33 w*/xlcie:b ab is initially moving at 1 m/s. How far does the cart travel before coming to rest?

  08.03: A dog starts from rest and2:-,i8sn iiq (3evo( +l xkcy:pyoept runs in a straight line with a constant acceleration ofnkpps8+ ix::- t( ivye l(2yie3c q,oo 2$.5\;m/s^2$. How much time does it take for the dog to run a distance of $10\;m$?

  10.29: A ball initially at rest falls without air resistb6 mmgg+c1.qsance from a height h above the ground. If the ball falls the first distance 0.5h in a time t, how much time is required to fall the remaining dista.g1s qcg+6mm bnce of 0.5h?

  10.38: Two objects both move and uniformly accelerate to the36, b vs0*+ uomncc3r 0nnsaz3dcbr)y right. At time t=0,the objects are at the same initial position. Object 1 has initial speed twice that of Object 2; Object 1 has one-half the acceleration of Object 2. After some t sb3u c,nanys6r)0 bz3v0rn3m*dc + ocime T, the velocity of the two objects is the same. What is the ratio of the distance traveled in this time T by Object 2 to that traveled by Object 1?

  12.26: An object is thrown horizontally with speed4zywq7/3o /jriz d*mqxr w7v 3 10.0 m/s from a height H above the ground. The object reaches the v/qr3my74jz x/iq7wo3d* wzr ground with a speed of 20.0 m/s. Which one of the following choices best represents the time of the object’s flight to the ground? Ignore air resistance.

  13.10: An object is ta0lr j*nc/n0zhrown straight upward. The object remains in free fall until itr l*j00nz c/an returns to its initial launch point. Which one of the following graphs could represent the velocity of the object as a function of time during its flight?

  14.03: An object is dropped into free fall. Throughr2 7suyj7; t0 uju8ulk how many meters does the object fall during thelkyt; 2r8 0juju u7us7 first 3.00 seconds of flight?

  15.02: A box uniformly slides 7.50 m to rest v.rj1shz .rxb13w fu1across a flat surface in a time of 12.0 s. What warrx bfvu.1hws z1j1 3.s the initial speed of the box when it started its slide?

  14.07: Starting from rest, a cart unifo7e,h-d2v0 0nmrji yprrmly accelerates to a speed of 7.60 m/s in a time of 3.00j00rde mi-yh p7rnv,2 s. Through what distance does the cart move in this time?

  14.16: A toy car initially m 6to8fy:pp* p;l1m)w b evd2fooves to the right at 60.0 cm/s. Five seconds later, the car is moving at 40.0 cm/s to the left. The total displacement of theb; :8dvwoe*t) l 2 oym6f1pppf car during this time is 10.0 cm to the left of where it started. Which one of the following choices best represents the magnitude of the average velocity of the car during the five second motion?

  14.17: A toy car initially moves to the right at/*7gf h*ac(edy( dqgl 60.0 cm/s. Five seconds later, the car is moving at 40.0 cm/s to the left. The total displacement of the car during this time is 10.0 cm to the left of where it started. Which one of the following choices best represents the magnitude of the aver7gh*f/da(qy(* cde lg age acceleration of the car during the five second motion?

  14.33: An object moves with constant acceleration starting with v1e ne:x,,wwt3wkpc, melocity $v_0 = 5.00\;m/s$ and ending with a velocity of $v = -1.00\;m/s$ in a time of 3.00 s. For this motion, what is the average speed associated with the object?

  15.05: An object initially is moving upward while in free falla1p -ya9eelx (. Which one of the following choices best represents the direction of t(lea9 -ex1ayphe object’s acceleration during its flight?

  13.26: An object moving only to iqz81 8.1m czcu awc/jthe right completes a 20.0 second trip in two stages, I and II. The average speed of the entire trip is 10.0 m/s. For stage I, the object moves with a constant velocity of 6.0 m/s for 12.0 seconds. What constant acceleration1c1mc/jzaw8zq.c iu8 must the object have during the 8.0 seconds of stage II?

  15.32: An object moving along a line completes a 20.0 secjcw/c/+gx gh ;ond trip with an average speed of 10.0 m/s in two stages. During stage 1,/x/ggcw;h +cj the object moves with a constant velocity of 6.0 m/s to the right for 12.0 seconds. What constant magnitude acceleration directed to the left must the object have during the 8.0 seconds of stage 2?

  13.33: At the top of a high cliff, a small rock is dropped from rest. A9vajynfhp o f;z u r393 9g:(tf*2xulg ball is launched straight downward with an initial speed of 36 m/s at a time 2.10 s after the rock was dropped. When the ball has fallen 28.0 m further than the initially dropped rock, what is the speed of the ball relath9lf9:ngt pgvza2*39r uu3 (f;o yjxfive to the rock?

  16.36: On a straight road, a self-drisj vjsd4 ep6eyw*8tm/o3 *q* vving car races with a robot. The robot accelerajtese** 3s4v8dwv6 /j*pymqotes at $8.50\;m/s^2$ until reaching its maximum constant speed of 15.0 m/s. The car accelerates at $5.60\;m/s^2$ until reaching its maximum constant speed of 25.0 m/s. The car and robot start from rest from the same location. What is the maximum distance that the robot leads the car during the race?

  17.44: A ball is launched vertically upward. ir.d .qq,db ,g p ci4/ye m:fholle0(.The vertical position of the ball 0.70 s after release is the same as its vertical position 4.10 s after its release. At what time is the object first at a vertical position that is one-half of the maximum height it obtains.. dhi g4le.:ymcpi/o(fr0 qlb ,d eq, during its flight?