94.01: Starting from rest, onk ,oyk9e.e1qip: )++m 3 2wti1mw bd*tfqol xbject 1 falls freely for 4.0 seconds, and object 2 falls f 9,i+qm y+ tet.d2n3imow qb)wxolk:*pk11fe reely for 8.0 seconds. Compared to object 1, object 2 falls:

  94.02: A car starts from rest and uniforar.n lh*ap3qmr m8g,gc9s7ra .nby89mly accelerates to a final speed of 20.0 m/s in a time of 15.0 s. How far does the car travea8 gg7 9y anm q.h arlmc*n8prs3r.b,9l during this time?

  94.03: A ball is thrown off a high cliff with no horizontal velocit 3y,22o3dsljv p/erza1squ- z y. It lands 6.0 s later with a velocity of 40 m/s. What was the initial velu sz3, 31o2lyvp2 a/re- qdzsjocity of the ball?

  95.27: A rocket near the su hzkw f,y6je.:rface of the earth is accelerating vertically upward ay ,fke6.whz:jt $10\;m/s^2$. 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 movingl8os p fmg3nx lkw ro+j+9zn-1)o v8h, downwards at 27 m/s at one instant. If it continues to fall, one second later the object would bevh wgksxm r-)f+n 1j8 p+zll,oo 89n3o moving with a downward velocity closest to:

  95.39: A car starts from rest and accelac ymy*)vh+ (/ hy7ca.f e1ctqerates 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 strikwp mhmj/6a 0sa 02y9dzes the ground with a speed of 30 m/s. Assume air resistancm2dp 0 /0haa yzmj69wse can be ignored. The height of the building is approximately:

  97.09: At a certain time, an object i4bvwoa;g emy(dc6 /l h;yt;vq6 m,;8qc -pkren free fall has velocity 4.0 m/s in the upward direction. What is the approximate velocity of the object oyem c 8p( rh;6le/dq;4 yob agtw-kv;;qcvm,6ne second later?

  98.14: How long must a yjo(( l*u+ma j$2.5\;m/s^2$ acceleration act to change the velocity of a 2.0 kg object by 3.0 m/s?

  98.15: A freely falling object is c;q/8)fczd n unt4 ll5found to be moving downward at 18 m/s. If it cl;5f4nnd)c cqz8t /ulontinues to fall, two seconds later the object would be moving with a speed of

  17.02: A small object is released from rest and falls freely for 4.00 s until re 1l0z9 qmm3qqa,w nkc3aching thm3m3cwlqqnk, 0q1 z a9e ground. What was the height above the ground from which the object was released?

  11.06: A ball of mass =0.100 kg is launched straight upward so that it r 15ag,eqg l7dfises to a maximum height odlge 5qag ,17ff 12.0 m above the launch point. Ignore air resistance. When the ball reaches its maximum 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 straiyl61w6ddh 3lc fy,3 0 ghvrso+;t miq/ght 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 ,dlvgqw c6sioh l/y r;0hy6d13f3tm+to reach the maximum height from its launch?

  98.31: An object sliding down an inclined plane h2v7fq 2l :hh0: d oblxhpp9u*tas speed 0.40 m/s two seconds after it begins to slide. Approximately howhd*xpv2fl0q:lt2h o 7 9bp u:h 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 ou/m,,g-y:t acz1 a ccgf 15 m/s. Coin II is dropped (zero initial speed) from the top of the t/cam1:cg ,tuy zc-g ,aower 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 w(og;,i ad/ey qith twice the initial speed of another, howad(o ygi/,e ;q much higher will it be at its apex?

  02.30: A box falls to thb,:hb9y0h )x6oavd(b n: -jo/eyrjuj e ground from a delivery truck traveling at 30 m/s. After hitting the road, it slides 45 meters to resby:au6j(d9h)0 eo-ojyrx :hvj bbn ,/t. How long does it take the box to come to rest?

  03.29: An object is thrown upwards with a velocity of 30s(t j3dpr(m/):jkb,hru urx 2 m/s near the surface of the earth. After two seconds what would be the direction of the displacemer,)m b:/2 k3s(dpxj(rhjur ut nt, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1p/gpx egj)6yrw 95- rim, 2m& 3m) are thrown vertically upward wrg/ew9p jyixg-5pr)6 ith 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 is negligible.

  10.25: Two point objects are launched straight upward xp0tg: xe+d + s-dl bhh4:m7upwith identical linear momentum. Object 1 has mass M and 7bud0l:+ - xsp4 t+hpxehgmd:reaches a maximum 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 bounces on the ground as shown. After each bounce, the b.u 7(r ,bi6ibziz w* s0ra5f 27botadoall 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,zu rt.7b 250(o76aw*bi zbd, isairof what would be the time between the second and third bounce?

  16.21: At 1.94 s after launch, a projectile in (sq3roejf4ib9 cvr,;free fall achieved its minimum speed during flight. If that mjq 9 c(b4r3 foe;vsri,inimum speed was 15.0 m/s, what was the projectile’s initial angle of launch from the horizontal?

  05.02: A pebble is dropped from a high vertica;at:ulxn.8)epri8 ,n cxo0pa l cliff. The collision of the pebble with the ground below is seen 1.50 seconds after the pebble is dropped. With what speenrn0 ;. alat o 8:xiu,xeppc)8d did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about the height of a parkisl49lp irv+r z749 pging 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 waspi z4 p4l lr+sg97vr9i 1.4 seconds, approximately how tall is the parking garage?

  05.07: A snail is moving along a straight lexhk1;y g(cf8 :vod*c/tn7jj ine. Its initial position is x0 = -5 meters and it is moving away from *78n xcgyt;:vd/ 1coj( jfkehthe 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-likw /h.2cw4qv8na - m1xkil)ctoe object is pulled downwards by gravity (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 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 l2w - .8m /ax1nctqho4c i)kvlwoss of energy and that it takes negligible time.

  06.13: A rock is dropped from the top of a tall tower. Half w-4 bne/vu u.ba second later another rock, twice as massive as the first, is droen-.bu wb/u v4pped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s along a t5p aob ld opp6-uy36:vrack. The cart comes to rest after traveling 1 m. The experiment is repeated on the same track, but now the cart is initially m5p-6p lvoo6 bap uyd3:oving at 1 m/s. How far does the cart travel before coming to rest?

  07.11: A cart is initially moving*6hgmjb6 , 06btlflnc 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 cart is initially moving at 1 m/s. How far does the cart travel before coming to restlf, m6 lc tnjh6g*06bb?

  08.03: A dog starts from rest and runs in a straight lineui -9swxd+3ux 18i kbd with a constant acceleration of 2x9i+ui3d -1 k8wbus xd$.5\;m/s^2$. How much time does it take for the dog to run a distance of $10\;m$?

  10.29: A ball initially at rest falls7cw0+*iuu fjj;7 qlk f-rq1rt 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 requiurflur77f j1kj *0- ;qq w+citred to fall the remaining distance of 0.5h?

  10.38: Two objects both move and uniform. 0o :nzaguoyl8y:pg; ly accelerate to the right. At time t=0,the objects are at the same initial position. Object 1 has in: y;gyln.gp8u 0oaz :oitial 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 2 to that traveled by Object 1?

  12.26: An object is thrown horizontally with speed 10.0 m/s from a heigpw,:x: jbige:jl k( h7ht 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 object’s flight to the ground? Ignowpj(, je ghb:k: ilx7:re air resistance.

  13.10: An object is thrown straight upward. The obj,2kg5k wl:u; ;yqjyxgect remains in free fall until it returns to its initial launch point. Which one of the following graphs could representy; 5kw:,gxky ;l qju2g the velocity of the object as a function of time during its flight?

  14.03: An object is dropped into fre1i pvv2 w5 xrk7m;zhx5ac6;m me fall. Through how many meters does the object fall during the first 3.00 secoc pmv1x5 5;zx2riavmmk w;76hnds of flight?

  15.02: A box uniformly slides 7.50 m to rest across a flat surface inf 92wow9cr /oz a time of 12.0 s. What was the initial speed of the box when it startedw9 r/fo c92wzo its slide?

  14.07: Starting from rest, mc3z4vgp50nn a cart uniformly accelerates to a speed of 7.60 m/s in a time of 3.00 s. Th gcm4np305zn vrough what distance does the cart move in this time?

  14.16: A toy car initially moves to the:wc y(k7bo9xjcom; my/- pg6d 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 the car during this tp /(6ym7g;:obkycw od cx-m9jime 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 secondby-; 2 vd:rgay8u t,kks 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 vdk 8bt ku:;rya2-g ,yof the average acceleration of the car during the five second motion?

  14.33: An object moves with constant acceleration starting waiv d . 9 w-a7d*3g7vg xfle(*uunw45sc z-evwith 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 ii/qlv86 ky(;n a,qjl js moving upward while in free fall. Which one of the following cho(i 8akqnjy/,vl ;lq6 jices best represents the direction of the object’s acceleration during its flight?

  13.26: An object moving only ynd)4(:)y 1c v .vluaga/hahrto the right completes a 20.0 second trip in two stages, I and II. The average speed of the entire trip is 1 havr) yly1/d :ahn u4v.)gac(0.0 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 8.0 seconds of stage II?

  15.32: An object moving al*ijlj9e)gfcy, r wk 0+ong a line completes 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 constant magnitude acceleration directe90 iwcj)*g,ky+j e lrfd to the left must the object have during the 8.0 seconds of stage 2?

  13.33: At the top of a high cp9 5rj8gs cve:i 7:*amovsj;uliff, a small rock is dropped from rest. A ball is launched straight downward with an initial speed of 36 m/s atu 7 sg:vo;rcps e8ia:9v5 *mjj 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 car races with a robot. T :r.2.dhyociids413wset+bcxf g2o5 he robot accecs2y+ 41 2:xbt s 5c.i drfdiohweg.3olerates 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 of the bac 8p1f /rc v(cae/ 0trl,c-og4dd q7gxll 0.70 s after release is the same as its vertical position 4.10 s after its release.-8lc/0atvegqrr gc/,d c4 7ocfp1dx( At what time is the object first at a vertical position that is one-half of the maximum height it obtains during its flight?