94.01: Starting from rest, object 1 falls freely for /q+mm6sif1 hv4.0 seconds, and object 2 falls freely for 8.0 seconds. Compared to object 1, object 2 fallq +/imf61mvhs s:

  94.02: A car starts from rest and uniformly acceleratidmq6f1re/mw ( x /xp1es to a final speed of 20.0 m/s in a time of 15.0 s. How far does the car traveq/m/ f(di61x rpw1mxel during this time?

  94.03: A ball is thrown off a high cliff with no horizontal velocitbg 3t lgkrq;64y. It lands 6.0 s later with a velocity of 40 m/s. What was the initial velocity of6k gg b4q;3rtl the ball?

  95.27: A rocket near the surface of the e+ud y8(bj z/;usrh9ecarth is accelerating vertically upward atehb(s ; /jd9c8ruu +zy $10\;m/s^2$. 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 downwards at 27 m/eza o*++a jjh0s at one instant. If it continues to fall, one secz+ea j+ *ao0hjond later the object would be moving with a downward velocity closest to:

  95.39: A car starts from rest and a/a vhb (442gz+g tr;:xadm qexccelerates 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 wjxji y /nj*0j7ith a speed7jjx0y/*nj i j of 30 m/s. Assume air resistance can be ignored. The height of the building is approximately:

  97.09: At a certain time,6h1h-kz 1wfa-pt a,sf an object in free fall has velocity 4.0 m/s in the upwardp- ,-shwhz1f1 kta6f a direction. What is the approximate velocity of the object one second later?

  98.14: How long must a csp,p t7s dt2n t bdxg872ty4-$2.5\;m/s^2$ acceleration act to change the velocity of a 2.0 kg object by 3.0 m/s?

  98.15: A freely falling obl1/ 4lnz7f ;w/c vgccnject is found to be moving downward at 18 m/s. If it continc n17/f4;lvc c glnw/zues 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 eo*ioo1 ipo-kq y5:-r reaching the ground. What was the height above the groun *qipo:ooy5e-r -ok 1id from which the object was released?

  11.06: A ball of mass =0.100 kg is launched straight upward s pf,,dff,h *zb, l,l16xxjrdlo 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 represents the magnitude of the net force acting on the baf6ld ,xdh,lxff, bpz*j,1, rlll?
D 10.0 N
E 12.0 N

  11.07: A ball of mass =0.100 kg is laulb k.m+ o ru i(x rn:1t(drv*p.wf,;hsnched straight upward so that it rises to a maximum height of 12.0 m above : hv( k*wtsr(d;.fl+r on1xpb ui.,r mthe 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 plane has speed 0.40z)xl9(d,bkc v3 ,sztkg ezao)w f8c*51puoj3 m/s two seconds after it begins to slide. Approximately how far does ip)czbws9*a1()5 o3 3 ukzt8ozl ,cjgfvk ed,xt travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m tow:m3wmx 3x7 b28 6hmxo 3fyc)m0wcjkmeer with a speed of 15 m/s. Coin II is dropped (zero initial speed) from the toc2j)m7w x: mm omh8e 3fwm3 xxc0byk63p 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 upw:owvnejal8 ju 10*nl5 ib,id7ards with twice the initial speed of another, how much hig i ,* ijd78e1n5lwnjlb :oa0uvher will it be at its apex?

  02.30: A box falls to/h) ef282y bwox:y y5f+ nzlei the ground from a delivery truck traveling at 30 m/s. After hitting the road, it slides)e8olfzy i25 w he2+/nxyb :fy 45 meters to rest. How long does it take the box to come to rest?

  03.29: An object is thrownb *ez wj:ohgymxa-y+afs+639( (0bu ntb ji7q upwards with a velocity of 30 m/s near the surface of the earth. After two seconds what would be the direction of the displacement, velocity and acceleration?+:9-(bgwi j+*eqx yj mz(6 u b3oy saf7hta0nb
displacement velocity acceleration

  04.10: Three stones of/bu i45xd2 hgrtrgt dgix7 *2/ different mass (1m, 2m& 3m) 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 maxi/xthgrx d i2bg* 4d7/2ugir5tmum height of each stone. Assume air resistance is negligible.

  10.25: Two point objects are launched straig toy*hjyjg9z b;:)e4ght upward with identical linear momentum. Object 1 has mass M and reaches a maximum height H above the launch point. If objojb);g y4he y :j9*ztgect 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 t b .1ub/7qpngshe ground as shown. After 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 b/pg.bnqu7s 1time between the second and third bounce?

  16.21: At 1.94 s after launclisfn;obxsj :w1 - r,;d tq0u4h, a projectile in free fall achieved its minimum speed during flight. If that snt;d jbrf:qix1 l w4sou;,-0minimum 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 op x)-:gr gk.1t c5eqyhigh vertical cliff. The collision of the pebble with the ground below is seen 1.50 seconds afte r.to-kpgq )xecyg: 51r the pebble is dropped. With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguinqq0 zrflf-2u2 g about the height of a parking 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, approximateqf 2 u0fqz-rl2ly how tall is the parking garage?

  05.07: A snail is moving along a straight line. Its initialdzftlz cy d(9h612 pu mt6m1+l 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 fd 6l zhu1td (mt+zp 926ycl1mposition, initial velocity and acceleration, respectively, are

  04.38: A small point-like object is pulled downwards by graw++xxi5w7ixa 09sc 30k jcbgevity (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 cha+5kse iwab9 c c iw70gxxj03+xnging direction that there is no loss of energy and that it takes negligible time.

  06.13: A rock is dro0uvxnld ( hd76pped from the top of a tall tower. Half a second later another rock, twice as massive as the first, is7n vl( 0dh6xdu dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s along a track. The ca+bx .l,4tvsut rt comes to rest after traveling 1 m. The ex, lvt.u +tsxb4periment 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?

  07.11: A cart is initially moving at 0.5 m/s along a track. The cart comes t )-agc6 obh :du4k(0srw5m zoio rest after traveling 1 m. The experiment is repeated on the same track, but now the cart is initially moving at 1 m/ rg):o wbzm di4au5( 6oh-s0cks. 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 constant89t vqkw,5 mnbk2p6n 0br trit s-cb2, acceleration of 2-kpbr2rc,ktwm b0n vi, n628q9tt 5bs$.5\;m/s^2$. 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 height h sylvi+ogz+5 - above the ground. If the ball falls the first distance 0.5-+lvsziyo g5 +h in a time t, how much time is required to fall the remaining distance of 0.5h?

  10.38: Two objects both movp z 33hi2a o vf6w 9u.0vqh3d91mdgzxxe and uniformly 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; 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 distanu 9zvzh.m 63h 3xg1dowpf qdav3 0ix29ce 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 hej dk/9 5i,p;djncs4gx ight H above the ground. The object reaches the ground with a speed of 20.0 m/s. Which on4k5d;ijn, s 9xpcgjd/e of the following choices best represents the time of the object’s flight to the ground? Ignore air resistance.

  13.10: An object is thrownpxoz 9.+ol 0,jfiucn1 straight upward. The object remains in free fall until it returns to its initial launch point. Which one oz91 unoxpofcil+j, 0 .f 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. Through how many meters does the obj:,h*/ibk;n+3w bt d yflh 7decect fall during the first 3.00 seconds of,biy7h;dbef lwd3/*+ :tnh c k flight?

  15.02: A box uniformly slides 7.50 m to rest across a flat surfaceb23evxv1 c* z s)z8czx in a time of 1 zcc8zz*b2s1v3x) ev x2.0 s. What was the initial speed of the box when it started its slide?

  14.07: Starting from rest, a cart uniformly accele nrcc+p)2*2m1lj6vb iyo0wjarates to a speed of 7.60 m/s in a time of 3.00 s. Through what distance does the cart move in this ti*p 2a rvmij1 )lw+oc0n2jbyc6me?

  14.16: A toy car initially moves to the right at 60.0 cm/pn uxlr/)+ 9;(jawpjd 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 average velocity of the car dua;w/p 9jjrpunxl d)(+ring the five second motion?

  14.17: A toy car initially mov rqbn/ -cgu6a3yh8zzcs1- q/ nn/l m/yes 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 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 av/ za1ly--mby/n /3gsquc /8 hcznr6qnerage acceleration of the car during the five second motion?

  14.33: An object moves with constant acceleration starbc 9w zg0g-9p o5rumq5-6cb mmp)a(aa ting 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*zq .ba erq1w20*q vyi of the following choices best represents the direction of the object’ yrqa.qve02*bzq1 wi*s acceleration during its flight?

  13.26: An object moving only to the righqs260c ek r6kkt 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 movek6qkek20s r6cs 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 along a q05qjt.q bc k1vww3r;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 qr ;. 0wbq15kt3wqvcj 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 ff,e: )nrlj/sa ;tdjm45s.m oz rom rest. A ball is launched straight downward with an initial speed of 36 m/s an j5.: ,st)o az4mfs ;jrle/dmt 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-drivingrr37gjr) zo4kfo9s 7m car races with a robot. The robot accelerates 9 orofsjmk) 4g7zr 7r3at $8.50\;m/s^2$ 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 up2fugoo2d;)w ez).hy wward. The vertical position of the ball 0.70 s after release is the same as its vertical positiofz oy u) oh2)w;.wdg2en 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 during its flight?