94.01: Starting from rest, object 1 falls freelz my;l cm2uo6 1w:o3quget 6-8uqhy 6zy for 4.0 seconds, and object 2 falls freely for 8.0 seconds. Compared to object 1, obje2czq ol6mzoy3m- u1wu6qt g e 68uy;h:ct 2 falls:

  94.02: A car starts from rest and uniformly accelerates zb-0 .bv 3 58kxitdwbato a final speed of 20.0 m/s in a time of 15.0 s. H 3ai0z xbwt.kb-d85bv ow far does the car travel during this time?

  94.03: A ball is thrown off a high cliff with no horizondxf04tk,k( zital velocity. It lands 6.0 s later with a velocity of 40 m/s. Whatd(ftx40zi kk , was the initial velocity of the ball?

  95.27: A rocket near f9cho8 md,: zkthe surface of the earth is accelerating vertically upward a d8hozkf, c9m:t $10\;m/s^2$. The rocket releases an instrument package. Immediately after release the acceleration of the instrument package is:

  95.13: A freely falling body is founxi4.;g l xdo,kd to be moving downwards at 27 m/s at one instant. If,x;lxd.iog4 k it continues to fall, one second later the object would be moving with a downward velocity closest to:

  95.39: A car starts from rest andqc)guq12 a* 2prha weg h3wgtls)*+p- accelerates at $0.80\;m/s^2$ 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 ground;lwcu n.xf-bjo 8ea3* with a speed of 30 m/s. Assue uj wb8na; xocf-*3.lme air resistance can be ignored. The height of the building is approximately:

  97.09: At a certain time, anf;b 8b1e 2z/n9 +,yxpw dbmves object in free fall has velocity 4.0 m/s in the upward direction. What is the approximate velocity odfze,sbvxe8 n 1 +;2 y/wbmp9bf the object one second later?

  98.14: How long must azfv),gf) d(dz $2.5\;m/s^2$ 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 movin f,am rtdw):k)g downward at 18 m/s. If it continues to fall, twom )r d)k,wt:af seconds later the object would be moving with a speed of

  17.02: A small object is relea2hh3oc( b kg;csed from rest and falls freely for 4.00 s until reaching the ground. Whaccok 3 hgb(h;2t was the height above the ground from which the object was released?

  11.06: A ball of mass =0.pbil g3o.50j jn7+),sjrnoy ,9 gtk sj100 kg is launched 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 maximum height, which one of the following choices best representsop5 grss+)t g,jjio93kb.j70n,y ljn 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 ngfo/o w)w0 ,h p1cf2ufl. n,/9.z h1bywzdglkg 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 height from its launch9 ho,,cf0zd wlu 1 1. wl.nb)ygnf/2fgwohpz /?

  98.31: An object sliding down an inclined plane has speed 0.40 m/s two seco+g/7ye . : 2*mp,4rv8rupfwryg pecmb nds after it begins to slide. Approximatelyrc/er u. +y28e,pm*ppmg4r7vwfb y:g how far does it travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m tower with a speed ff p*k+jze0 w,of 15 m/s. Coin II is dropped (zero initial speed) from the top of the tower 2.0 zwk0p,+f fe* js 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 twice the i-xai2 hhu4mm9ymfx 6qm.a(21 6u li yanitial speed of anothq1u amyfhmia hm(uixml- 62.x6 ya924er, how much higher will it be at its apex?

  02.30: A box falls to the ground from a delivery p-by,/kh-c k9pb jix 9truck traveling at 30 m/s. After hitting the road, it slides 45 meters to rest. How loi -jb9-/b, cp y9phkkxng does it take the box to come to rest?

  03.29: An object is thrown upwards with a velocity of 30kw2h ii mn /(t0c4gmvs/i+sl* m/s near the surface of the earth. After two seconds what would be the direction of the displacement, velocity and acwnksihv g2+/i4*(i mmtc l/0 sceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3m) are thrown vertically ukv5o srd 2/pj27dtvru yw0 b8;pward 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 of each stone. Assume air resistance isj 0v 7yrtbo2 kur;p/ddw 58sv2 negligible.

  10.25: Two point objects are launched strai*e liv0t49vkkght upward with identical linear momentum. Object 1 has mass M and reaches a maximum height H above the launch point. If object 2 has massv 4ie0vl9kkt* 2M, what is its maximum attained height above the launch point in terms of H ?

  04.28: A rubber ball bounces on the ground as shown. Aftee9 ue6,9x pc(;ucvpybr each bounce, the ball reaches one-half the height of the bounce 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 theey;6pu( uxp v9c,9be c second and third bounce?

  16.21: At 1.94 s after launch, a projectile in, .f 8ag+wscwb free fall achieved its minimum speed during flight. If that minimum speed was 1 fswg wac+,b8.5.0 m/s, what was the projectile’s initial angle of launch from the horizontal?

  05.02: A pebble is dropped from a high vertical cliff. The collision ozf .b15wn um1b 2mslwl5g// :blt+yjvf the pebble with the ground belm /zw s .lnltyg5:5f1u+bl/2vbwmbj 1ow is seen 1.50 seconds after the pebble is dropped. With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about the height of a park n1lnvq3/vpcp/0 pb2y ing garage. 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 balls. If the time for the ball to fall was 1.4 seconds, approximately how tall is theb 1vlpnn3q20c vyp//p parking garage?

  05.07: A snail is moving along a straight line. Its initial 1bp5png* i1xd0z3j7j7e z r zjposition is x0 = -5 meters and it is moving away from the origin and slowing down. In this coordinate system, the signs of the initial position, initial velocity and acceleraix0 5dez7zrz7*3n 1pjj j1bpgtion, respectively, are

  04.38: A small point-like object is pulled downwards by zhp5d+ck7jn q3t1 wikt at)sp/ hc)69gravity (down the plane of the page) but is constrained to exactly follow each of the frictionless pathways shown. Rank these three paths from shortest to lontpjwciq s d1an t3+c9)7p zh6t)k5 hk/gest 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 the top of a tall tower. Half a second later anotfktssl3osuv,9, nz 3ut;)nr 3her rock, twice as massive as the first, is dropped. Ignoring air resistrufszs,3 v,nto)uks l;3n39tance,

  06.18: A cart is initia j6mjxyyr+; p6lly moving at 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 c;j6 xyp6+yjmr art 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 0.5 m/s along v gnyh9x ulw- .0g5ni/a track. The cart comes to rest after traveling 1 m. The experiment is repeated on the samenhw-n v5.l g y/ui9gx0 track, but now the cart is initially moving at 1 m/s. How far does the cart travel before coming to rest?

  08.03: A dog starts from rest and runs in a straight line with a constant accelph04gtk 0t8 b5 -sjddheratio h4-5sdg0 htbkjdp t80n of 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 r)o8w:1xaqz z:)qznn ghcc +(phv z54 without air resistance 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 remac 8 oh)hn5gzzwvp)n(4 x +r:c1q:zzaqining distance of 0.5h?

  10.38: Two objects both move and uniformdtedv g5.x 7w7+7pn pxly accelerate to the right. At time t=0,the objects are at the same initial position. Object 1 has initial speed twice that of Object 2; Obe7vxwdp+dpg7 7.tn x 5ject 1 has one-half the acceleration of Object 2. After some time 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 throw*m1 qq4clrg. en horizontally with speed 10.0 m/s from a height H above the ground. The object reaches the ground with a speed of 20.0 m/s. Which one of the following* lqc4e .1mrqg choices best represents the time of the object’s flight to the ground? Ignore air resistance.

  13.10: An object is thrown straight upward. The object remainwgn jvx7t+xiba9u/r j)c;0:fjm8si1 s in free fall until it returns to its initial launch point. Which one of the following graphs could represent the jm0ub+svj1gj9nx /; 78xr tif)w:aic velocity of the object as a function of time during its flight?

  14.03: An object is 4i;jz 6a-cz mxdropped into free fall. Through how many meters does the object fall during the first 3.00 seconds of6zm-i4 zaxc;j flight?

  15.02: A box uniformly slides 7.ajslfp7 46h5 g50 m to rest across a flat surface in a time of 12.0 s. What was the initi p5slga 7h46jfal speed of the box when it started its slide?

  14.07: Starting from rest, a cart uniformkv3otg : vocvqm(5w*.ly accelerates to a speed of 7.60 m/s in a time of 3.00 oto w m3.: vq*kc5(gvvs. Through what distance does the cart move in this time?

  14.16: A toy car initially moves to the right at 60.0 cm/s. Five seconds latejt:.o)g;uady2 ) rr mgr, 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 average velocity of the car during the f) )rd tu:ao m2yr.;gjgive second motion?

  14.17: A toy car initially moves to the right at 60.0 cm/s. Five seconds lau x6ld7d0)zdv ter, 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 zd70 l6) duxvdone of the following choices best represents the magnitude of the average acceleration of the car during the five second motion?

  14.33: An object moves with constant acceleration startings.*ktfq 9a2sz 6dg14+ asvtuh with velocity $v_0 = 5.00\;m/s$ 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 fall. Which one of t3 zi.p1siw,vj6ld3tu zf9:r q he followv1zt:i fz9.qilw, 36 urdjs3ping choices best represents the direction of the object’s acceleration during its flight?

  13.26: An object moving only to the right completes a 20.0 secj. :3of zsix3b-g qsgoyw):r7 ond 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 secon -qg:wsbi:s3).rg oo yfz3 7xjds. What constant acceleration must the object have during the 8.0 seconds of stage II?

  15.32: An object moving along a line completes a 20.0 secony8 olv-ug2fqw(eg0 ;kd trip with an average speed of 10.0 m/s in two stages. Duriy(28e- lfg;uow0 gkvq ng stage 1, 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, ,8e xh t8wxvms3n 1fge2;kx w0a small rock is dropped from rest. A ball is launched straight downward with an initial speed of 36 m/s at a time 2.10 s ;g k,8x8v21 s0x nxw3 fmetehwafter 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 relative to the rock?

  16.36: On a straight )o e kxrr29.nvsu v8s)road, a self-driving car races with a robot. The robot accelerates at s)2ek9u .nrsvrov8x)$8.50\;m/s^2$ 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. The vertical 5reid o-e-)u d8ghq5si map(bwf()-a position of the ball 0.70 s after release is the same as its vertical position 4.10 s after its rem)uig-p()85dow-d (esr -f b5ehqaia lease. At what time is the object first at a vertical position that is one-half of the maximum height it obtains during its flight?