94.01: Starting from rest, object 9z2; 8h:gf5eq 0i m:bnylu79lgdq t pl1 falls freely for 4.0 seconds, and object 2 falls freely for 8.0 seconds. Compared to object 1, dyeg zq9tl2:m;u lhn5q8g0: f9bil 7pobject 2 falls:

  94.02: A car starts from rest and unifkpd s)ip9z.)l2 ;u31bihi yccormly accelerates to a final speed of 20.0 m/s in a time of 15.0 s. How p1 .b )3)ip ikycudihz9s2 lc;far does the car travel during this time?

  94.03: A ball is thrown off a high cliff with no horizontal velocity. It lands4ajdusqju 0x 7.:cu cv13g(lf 6.0 uax g j:fjs37d1ucq( 4ul.vc0s later with a velocity of 40 m/s. What was the initial velocity of the ball?

  95.27: A rocket near the surface of the earth is accelerating vertically upw2 jpct+pg(*v2 a6hgdrard at p *( v+p tj22c6ggahdr$10\;m/s^2$. 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 iitg2x/,iwny -(4vgm at 27 m/s at one instant. If it continues to fall, one second later ti 4 -in ,y(2tw/vgigxmhe object would be moving with a downward velocity closest to:

  95.39: A car starts from rest and(5epwmg)krb5pi tri 8; r2k.d 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 em -ox3oab4 e8a building strikes the ground with8 a4 exoo-mb3e a speed 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 veloc 0-wj;uye zqf5ity 4.0 m/s in the upward direction. Why5qeu;-w f 0jzat is the approximate velocity of the object one second later?

  98.14: How long must a5 mal7+5 jquqo $2.5\;m/s^2$ 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 l32 d:qz3hfs4 zc:vf2y)txu pdownward at 18 m/s. If it continues to fall, two seconds later the object would be moving with a s)qhc ft :2lxvzydpfu2s 3 :z43peed of

  17.02: A small object is released / fb2 lwudq+el45p;zjg-vw7mfrom rest and falls freely for 4.00 s until reaching the uml/2gl-4dbefw p+q;5wv zj7ground. What was the height above the ground from which the object was released?

  11.06: A ball of mass =0.100 kg is launch:x8+k ddls5ucsm vw:6th0 f7e64wniv ed straight upward so that it rises to a maximum height of 12.0 m above the launch point. Ignore air resistance. When7:nhis6 x st4fw0l5v:kwc6d m u8ed+v 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 straig. zvu*,-jj6vm0vr py+a q:fseht upward so that it rises to a maximum height of 12.0 m above the launch point. Ignore aire-j.p :,jrayvv6 svz +uq0*fm 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 ryl0tmwn5swru+h;92bli a( /6r cue7 plane has speed 0.40 m/s two seconds after it begins to slide. Approximately how far rr 927 yw/6n +0cim sll5uwr hb(;tauedoes it travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m tower with a speed y +inf frtm2w/lh4c2ljp - .c2of 15 m/s. Coin II is dropped (zero initial speed) from thecfj+2yhlt2min / -. lfr24cw p 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 1*;hzmmfx:x -uoo0nx directly upwards with twice the initial speed of another - *1mnfxh;:oxx mouz0, how much higher will it be at its apex?

  02.30: A box falls to the ground from a delivery truck travelin/;pnq azmb. t8.q9m)e:s zhj kg at 30 m/s. After hitting the road, it slides 45 meters tp9 .sz8/ebn:a .qmh z;qk)jmto rest. How long does it take the box to come to rest?

  03.29: An object is thrown upwards with a v.8 umsgr2x l9nvd v2o+elocity of 30 m/s near the surface of the eo28 g 9+xs2umv vld.rnarth. After two seconds what would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of d3s, q1l( 9f(feqmzg ajifferent 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 max,f1 gm 9(aefj(l3zqsq imum height of each stone. Assume air resistance is negligible.

  10.25: Two point objects are launched straighh:c+enffv)sx/ /p(-z/hwi a xt upward with 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 xa/- hen:zvs i+fwc/h (x/ )pfmaximum attained height above the launch point in terms of H ?

  04.28: A rubber ball bounces on th7 fp;i j -f00waixm2mce ground as shown. After each bounce, the ball reaches one-half the heighw -7;m0 ip2jca0fim xft 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 the second and third bounce?

  16.21: At 1.94 s after launch, a projectile in free fall achieved its minimum oalh7e91km)l speed during flight. If that minimum spe9 71hk)oellm aed 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 vertical cliff. The collis,82ilv:xn2isss52l+ jwbj 4x tqn nt.ion of the pebble with the ground below is seen 8nbs 2jjnvqixs.l2tw 2l5txs4+ , n:i 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 ofpt/b8w4qbh 4)z g,rm m a parking garage. One student suggested that to determine the height of t8r ) w4h /gpt,4mbqzbmhe 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 the parking garage?

  05.07: A snail is mof 35hvst s.s//ywd:hjving along a straight line. Its initial position is x0 = -5 meters and it is moving away from the origihvw.s 3sd://j t h5fsyn 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 by gravity (down the m /bq c 2.veeap)7anf,plane cnmae.qv2bp)e,f a7/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 loss of energy and that it takes negligible time.

  06.13: A rock is dropped from the top -d9k dch2q6ec of a tall tower. Half a second later another rock, twice ask69c2 qcedh-d massive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s alon 8 zzicp39*zlag 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 trave3pl iaz*czz9 8l before coming to rest?

  07.11: A cart is initially moving at 0.5 m/s along a track. Ther08x dh(z2kha 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 cd a hkz8r0h2(xoming to rest?

  08.03: A dog starts f2 6*)e:crh.aydz(ce sc+il )x)q d upcrom rest and runs in a straight line with a constant accelera qccu aix:ed dc.e+)lyr)szc( )h*p62tion 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 atpc cb biw.sl,og rq:*i6m.p 7on b49v0 rest falls 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 *nw.6.i9o c:obvp0sg7bbc4,qmipl r fall the remaining distance of 0.5h?

  10.38: Two objects both move and unifaqdc: 6dwcx xusdf 6q4lt9- j--+qz.c5j*cfj ormly 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 t+54dj:jqc *cfwu69qls6zdj-q a ftx--.cxdcime 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 height;fry4/a4o p rywiy 9c0+gxs ;3xk7h ze H above the ground. The object reaches the ground with a speed of 20.0 m/s. Which one of t+;ra yi90 3shoer/ x7gy p4fxwz ;yck4he following 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 remd +,z2gmd+s bz gbx85 p8pv6cnains in free fall until it r+5 6gzvmzndspcb pbgd,8 x2+8 eturns 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. Througbugq 6+khp y21h how many meters does the object fall during the first +1qkp b yhug623.00 seconds of flight?

  15.02: A box uniformly slides 7.50 m to rest across a flat surq7e1w3s s8hh)gf-mw mface in a time of 12.0 s. What was the initial speed of the boxq81 gfe )wmss- 7m3hhw when it started its slide?

  14.07: Starting from rest, a cart uniformly acceleu +dpf0mio 9:jrates to a speed of 7.60 m/s in a time of 3.00 s. Through w +d0 f9pijmou:hat distance does the cart move in this time?

  14.16: A toy car initially moves to the rbmg xwu :m33)wight at 60.0 cm/s. Five seconds later, the car is moving at 40.0 cm/s to the left. The total dism33uxmb ww):gplacement 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 five second motion?

  14.17: A toy car initially moves to the right at 60.0 cm/s. Five seconds labygsn) 8p2+ riter, 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 ther +s2 inp)yb8g average acceleration of the car during the five second motion?

  14.33: An object moves with constant acceltjusyn(lf* **qe36 ymeration starting 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 free2 vwaxcp1 /n(/s.aqg w fall. Which one of the following choices best represents the direction of the object’s acceleratgcawv.2 w/1 /xa(sp nqion during its flight?

  13.26: An object moving only to the right completes a 20.0 second trip in*gwzk8/ +njf44e)4d)i m m dtuq dr5im 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 constan/)gmj 44iet54zki*nd )mdufd mq r+8wt 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 line completes a b8c vn,z /p-/*jslttn20.0 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 directed to the left must the object have during the 8.0 seconds of stage 2? jv- *,cb/s ntpz/8ntl

  13.33: At the top of a high cliff, a small rock is droppe1olj6wemf y +c.3: c qhpz5t.jd from rest. A 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 inlw+1 6c.fqm3 jjpc tyhoz :5.eitially dropped rock, what is the speed of the ball relative to the rock?

  16.36: On a straight road, a se*y6ikn 1qj9: xkrekve 7k (p4tlf-driving car races with a robot. The robot accelerates at ky(xj9kkn:6r 4*eet1p7 iv qk$8.50\;m/s^2$ 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 posbj/gx*2xj1j + cjz rkt6m5kts (y3 a+dition of the ball 0.70 s after release is tkbd r(y13+gt jxk+t */2jsjcx az5mj6he 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 during its flight?