94.01: Starting from6po/gjpg4 o .r ijsos:q7k4g2 rest, object 1 falls freely for 4.0 seconds, and object 2 falls freely for 8.0 seconds. Compared to object2gqr4:soi g6go.js poj7k /p4 1, object 2 falls:

  94.02: A car starts from fxk (bap.;ns :96jbflrest and uniformly accelerates to a final speed of 20.0 m/s in a time of 15.0 s. How far does the n6k(plb9 fa .js;:fbxcar travel during this time?

  94.03: A ball is thrownse-6 wstx 4px8 off a high cliff with no horizontal velocity. It lands 6.0 s later with a velocity of 40 m/s. What wx s6ws-48 exptas the initial velocity of the ball?

  95.27: A rocket near the surface of the earth is accelerating vertically upward 1-j6;bcbqzcuw dc zhqu8 74x2a;cjzcqzdubu6-qc 1x472 8b wh 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 found to be moving downwa 4sr.lowa 3;qtrds at 27 m/s at one instant. If it continues to fall, one second later the object would be moving withortq4sl a3w.; a downward velocity closest to:

  95.39: A car starts from rest and ac;p n kqj,+uge3r:gq)dx+8bhlcelerates 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 ogf f+v0xmp,5/-zpv6ud; j6a-pmu sdu g(g x-mf a building strikes the ground with a sppv6-+gd 6p -/a g0,ux m-x5smdf zv( m;fjugupeed of 30 m/s. Assume air resistance can be ignored. The height of the building is approximately:

  97.09: At a certain time, an object in free fall has velocity 4.0 m/s)gx8tlr8 vpv z45i.zp in the upwitp8p v). x8 vz5z4lgrard direction. What is the approximate velocity of the object one second later?

  98.14: How long must a )tz sq52i) cw8a:jtib$2.5\;m/s^2$ 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 . ecs.krt (3rmacc-3e moving downward at 18 m/s. If it continues to fall, two sectrecs3 -c (cre3 ..amkonds later the object would be moving with a speed of

  17.02: A small object is released fro5l a ,u-0.bzoeucvz8v m rest and falls freely for 4.00 s until reaching the ground. What was the height above tbz8o0 ,v5a-luevz. u che ground from which the object was released?

  11.06: A ball of mass =0.100 kg is lauqa 1xmh .qj * ykffc8hrgf;k2*/kz0g(nched 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 maxi* za /0 mf.gfhk2*ch1qgjkxy 8fk(rq;mum 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 is launched straight up gi zcds)(r6lvcf(c(kci ,ow9 5uk: *rward so that it rises to a maximum height of dl gkk,cufirv*z()osr:6 (c(9i5 wcc12.0 m above the launch point. Ignore air resistance. Approximately how much time does it take the ball to reach the maximum height from its launch?

  98.31: An object sliding down an inclined p0/82cvi jbme+gmwnij ) s1lg) lane has speed 0.40 m/s two seconds after it begins to slide. Appro21 )j+) ni/wejclv bs8imgmg 0ximately how far does it travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m toucb/k.a2t 7 glwer with a speed of 15 m/s. Coin II is dropped (zero initial speed) frolk7/.2tub cagm 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 t8 .d p/ 8 ezl.jckmx4v7ijka5nwice the initial speed of another,c7ne.jxak p8 ild4 vk.z/8j5m how much higher will it be at its apex?

  02.30: A box falls to the ground from a dev,fzk8*s7qd.t y.f qu9bh zs *livery truck traveling at 30 m/s. After hittinyf7b t,z*zs *s9 vhqu.qfk.8 dg 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 upwards with a velocity of 30 m/s ne qg+ucl a) m g+wmxye776dfd,3ar the surface of the earth. After two seconds what would be the direction of the displacement, velocit ) 7xmeyg lqw6dg,cma+fu+7d3y and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3mdn* u+vtd 1xcda19a1z) are thrown vertically upward with different velocities (1v, 2v& 3v respectively). The ddaz 1 xddv11cn9t *ua+iagram indicates the mass and velocity of each stone. Rank from high to low the maximum height of each stone. Assume air resistance is negligible.

  10.25: Two point objects are launched straight upward wp7.-f6e/ gbocq uob9v ith identical linear momentum. Object 1 has mass M and reaches a maximum height H above the launch point. If object 2 has mass 2M, what is its maximum attained height above th/bqc .b6u-gefv po97oe launch point in terms of H ?

  04.28: A rubber ball bounces on the ground as shown.x9 lm,wzzmkp4ck3 05p After each bounce, the ball reaches one-half the height of the bounce before it. If the time the ball was in the air be9plz 4z0 c3kxkmpw,m5tween 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 achievet/3 0 kpuuxw1td its minimum speed during flight. If that minimum speed was 15.0 m/s, what was the projectile’s initiatx0 tp/uwu 31kl angle of launch from the horizontal?

  05.02: A pebble is drj) 1o)6af hvv r-c0acsopped from a high vertical cliff. The collision of the pebble with the gra) r avh6cj)c v0f-o1sound below 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 hepr5czkuef ae) :*9z q0ight of a parking garage. One student suggested that to determine the height of the gqkef5*zurecpz0 a:9 )arage, 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 the parking garage?

  05.07: A snail is moving along a straight line. Its initia+ aqh3in mb9)yl position 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,n3)q h9ybm+ia initial velocity and acceleration, respectively, are

  04.38: A small point-like object is pulled downwards by gravity 9j0:oi+ cihc(i8ovd p (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 longe0vii(c jio h+dpc98o:st 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. H4jn2:4vilr a nalf a second later another rock, twn2jr44n l: iavice as massive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s along ag* y.x+ ;fjs6a wzhn0u track. The cart comes to rest after traveling 1 m. The experiment is repeated on the same track, but now the cart is initially moving at 1 m/sfza;06hs yjuxnwg*. + . How far does the cart travel before coming to rest?

  07.11: A cart is initially moving at 0.5 m/s along a track.k;dnyc/ e6wxjp6igq1 w8 j.l: The cart comes to rest aftj j.ey wn/1xkq:8wdgpci6l; 6er traveling 1 m. The experiment is repeated on the same 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 .dw)pp90i ug 7,pjcihruns in a straight line with a constant acceleration.pu,pwij d0h gp7)c 9i 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 without air resistance from a rwnekq i3 ;rnju 7r7l, 6e3bv5t a2s1nheight h above the ground. If the ball falls the first distance 0.5h in a tw1ks7 753tl6ai,brre;rj u2e 3vnnnqime t, how much time is required to fall the remaining distance of 0.5h?

  10.38: Two objects both move and uniformly accecli je-zw)q2 /h5qpj..7hmer 9d l(qolerate 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; Object 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 i2hle .c jw q 9md7qpe)-ojz.5 r(/qlh2 to that traveled by Object 1?

  12.26: An object is thrown horizontally w:b3p,dvt2ye3 g pyc;y ith 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 choices best represents the time of the yy,c2ptd3 p;bv g: y3eobject’s flight to the ground? Ignore air resistance.

  13.10: An object is thrown straight upward. The object remains in free fa.+g6/ e/il l l6pfd nplgb:bc/ll until it returns to its initial launch point. Which one of the following graphs could represent the velocity of the object as a function of time durin.+ fp6 ll e/6 ldgibl:g/b/pcng its flight?

  14.03: An object is dropped into free fall. Through how ma/;n)q lhji*f0 n7ztr gny meters does the object fall during the first 3.00 seconds ofnr l/ *)i7tzjqg0fn; h flight?

  15.02: A box uniformly slides 7.50 m to rest across a flat surface in . lep a8m2wb)wa time of 12.0 s. What was the initial speed of the box when it starte mpb)lw2 a8w.ed its slide?

  14.07: Starting from rest, a cart uniformly accelerates to a speed m 86s*cg8k)sq 8 k.ca ciop5xdof 7.60 m/s in a time of 3.00 s. Through what85*gko86p.mkssa8 )ccd icqx 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 later, fi1bcc hsy7-5bb63 wl the car is moving at 40.0 cm/s to the left. The total displacement of the car during thi lc3f16by5b-h7csiw bs 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 60.0 cm/s. Five seconds. )vfgbs2y:: kpdyu 1m 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 average acceleration of the car during the five second mot b1v2k)gy::us. m fypdion?

  14.33: An object moves with constant acceleration starhe/u 7eiuugb43 i+dhh2ki .:eting 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 ovjk :ecm 0qm7(1k,ovtf theqko0vtc( v:7j,m m1k e following 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 second tr8wgm; y)zt, 5d)ponzb ip 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 acceleration must the object have during the 8.0yn obg8); ,w mz5)ztpd seconds of stage II?

  15.32: An object moving along a line completesurkan foqi;zm l77:2 45,mf) 7qfqhma a 20.0 second trip with an average speed of 10.0 m/s in two stages. During stage 1, the object moves with a constant velocity of 6.0 m/s to the right for 12.0 seconds. What consta :k7aa q5qz7 rf mmqlf,m4o;i2 uh)7nfnt 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 smaly q/c/..h2 *uo kx,hacmodq* el rock is dropped from rest. A ball is launched straight downward with an initial speed *a, o /dh/.cm*u2 kqo.xhey qcof 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 relative to the rock?

  16.36: On a straight road, a self-driving o2ujk/i7pgr8 9 7p ,:scbrrvb car races with a robot. The robot acce9pvp 7uc82o:rk7sgbb j / r,irlerates 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. The vertical position x:r2u a1a f:79xa d8odlb2pnfof 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 l: x2bx:a8 raoap7n2f9 du1fdof the maximum height it obtains during its flight?