94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and y:9+8 ub d- m +kmuwux-1;jq(byejcdgobject 2 falls freely for 8.0 seconds. Compared to object 1: byj(u1 9wqu-y mkc+8d+e;jmd gb-xu, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to a final speed of/aezf w m+ye01 20.0 m/s in a time of 15.0 s. How far does the car tra yfa1 0+zmee/wvel during this time?

  94.03: A ball is thrown off a high cli/.: ,tbet.st5it vkb tcn7xqpe8.y8 ja 1sfk*ff with no horizontal velocity. It lands 6.0 s later with a velocitt.x. jv/ :b *s aktksitbp ,t71cee fn58qt8.yy of 40 m/s. What was the initial velocity of the ball?

  95.27: A rocket near the surface of the earth is accele2 2 t:o28ipuagdgz/w irating vertically upward at pwudt8i:/zi 22gg 2 oa$10\;m/s^2$. 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/s at onevkm7nata 7 trh48,nf4 instant. If it continues to fall, one second later the object wouf k 8atnth 4a7,mn7v4rld be moving with a downward velocity closest to:

  95.39: A car starts from rest and accelerat w v3g6au.wg x1q/rj(aes 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 ww+z9ymih+zm-ry0 . ta ith a speed of 30 m/s. Assume air resistance can be ignored. The height of thetwa -+y9. hyi r+mz0zm building is approximately:

  97.09: At a certain time, an object in free f il5k8kb3t s3vq 1hinf6rhf5:v5 ,3vkli die (all has velocity 4.0 m/s in the upward direction. What i,5 vb3 ik5ev(h3:n5f1iil fh iv8kkqd63rlsts the approximate velocity of the object one second later?

  98.14: How long must ay:g6yyh4gzpx ,ek8 s,z*f 7 sh $2.5\;m/s^2$ acceleration act to change the velocity of a 2.0 kg object by 3.0 m/s?

  98.15: A freely fall4v6/ xbbv8pkking object is found to be moving downward at 18 m/s. If it continu6x vpvb4/kbk8 es to fall, two seconds later the object would be moving with a speed of

  17.02: A small object is releaser7y rsg:q-.fuqb 9q j1d from rest and falls freely for 4.00 s until reaching the ground. What was the height above ts qqguf1qyr-9r:.jb 7he ground from which the object was released?

  11.06: A ball of mass =0.100 kg is 8vp p it3 aba/q;,o/rtlaunched 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 choices3ata p q;vpo/b ir/t8, 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 kf/o*/ ;+p ng aj8l/xgk(.9re b cmdzxbg is launched straight upward so that it rises to a maximum height of 12.0 m above th l* .xe8(zc max9+g;o //gdfjp nrbkb/e 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 dow)y/lwz umuj7)n an inclined plane has speed 0.40 m/s two seconds after it begins to slide. Approximately how far doesjy/m)z7u)l wu it travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m tower with o h119xx m;cvvyc6 cz,a speed of 15 m/s. Coin II is dropped (zero initial speed) from the top of the towey oh69 m;c 1v1cxzcvx,r 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 directnj( 8q9x9 crj+6) ty-mjtmpz* bo cnp5ly upwards with twice the initial speed of another, how much higher will it be atp-n98ct+j 9ncyjrx) *p jmq mo6 z(b5t its apex?

  02.30: A box falls to the ground from a delivmi6cx u:id.0mery truck traveling at 30 m/s. After hitting the road, it slides 45 meters to rest. How lu ii.mcdm:6x 0ong does it take the box to come to rest?

  03.29: An object is thrown upwards with a velocity of 30jpk)+ayi i6 .l m/s near the surface of the earth. After two secoj.i) + yipkal6nds what would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3m) ar smbci-p5x qmdnshw66 lv4y a+4*8yi+e 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 maximumm6q68y 5 p mhlwbvs+ cs-* i+4ya4inxd height of each stone. Assume air resistance is negligible.

  10.25: Two point objects are launched straight upward with identical yp9xvus9b3 o+ 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 u+x3bo 9pvs 9yattained height above the launch point in terms of H ?

  04.28: A rubber ball bounces on the ground as shownfs lkcg69zkn(aga-q4. , r p(s. 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 time between the second aack (( gs.-6lq 49zk,gpfrn sand third bounce?

  16.21: At 1.94 s after launcd ahszo(32biikj/44wh, a projectile in free fall achieved its minimum speed44(b oz a/iij2hk dws3 during flight. If that minimum 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 vertical bgi 76ekqa7c82)s dfjcliff. The collision of the pebble 8gdje ki 7c62s)7qabf with the ground 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 heighw-o*7ruhvb a)hx(7fb * y/egut 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 7ebux) *f/ra*hyb -uwv7h (ogtime for the ball to fall was 1.4 seconds, approximately how tall is the parking garage?

  05.07: A snail is moving alq4-ko6g zbo*a/:cp iaong a straight line. Its initial position is x0 = -5 meters and it is moving away from the origin and slowing down*apcgoz 4/qbk-i 6a :o. 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 d 9bi;fbs qw6hu1fr i+1ownwards 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 chani6ubwsr1i+9q b1ff;hging direction that there is no loss of energy and that it takes negligible time.

  06.13: A rock is drop 9h zsf172tywfped from the top of a tall tower. Half a second later another rofwt7z f9h1 ys2ck, twice as massive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initiallyn7so 102+zabnry79rh nboq ;z 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 cart is initially moving at 1 m/s. How far does s7h+r7bn1zny9q n o;br z 0ao2the cart travel before coming to rest?

  07.11: A cart is initially moving at 0.5 m/s along a track. The cartwsha01v()t p,em8g6vt 2r x gr comes to rest after travelinea)vg,xmp2s tw6hg810t r(rvg 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 runs in a straight line wizn s*p8 8p2okuth a constant accelerat8o2 zs* p8puknion 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 height h a1cc el-bvk 3/;r e+mam sm2(qtbove the ground. If the ball falls the +m2e t-mrl e1k3a;cbc/qmvs (first distance 0.5h in a time t, how much time is required to fall the remaining distance of 0.5h?

  10.38: Two objects both move and uniformly acceleraqdpr6j 37c tu/te 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 2 to that traveled by Obr7q tp3cuj /6dject 1?

  12.26: An object is thrown hork7i1at1o b z-vrw*1m lizontally with speed 10.0 m/s from a height H above the ground. The object reach7 1o1bitz*la1rkw v -mes 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? Ignore air resistance.

  13.10: An object is thrown straight upward. The object remains in free fallty-mu w(x/6dg 9nkkx 4 until it returns to its initial launch point. Which one of the followingd4kg/ xnmu6(9wt ykx- 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 r hk.+epfb2v 8meters does the object fall during the firp8re2 + bkvfh.st 3.00 seconds of flight?

  15.02: A box uniformly slides 7.50 jsr.tv7,d0hd7m6e - t .pu jzqm to rest across a flat surface in a time of 12.0 s. What was th,jj h d6d-7.esr7vqm.tz 0u tpe initial speed of the box when it started its slide?

  14.07: Starting from rest, a cart uniformly an y 7 ktrkgtm9/*4h hxg5*bi1occelerates to a speed of 7.60 m/s in a time b1go*5ht7*xhi 4/ tnr9 gkkmyof 3.00 s. 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 fd:bxbz .jd. 2lp 5a.aseconds 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 during the five second motib. j2x.alzdpfa: .d5bon?

  14.17: A toy car initially moves to the right at 60.0 cm/s. 9veimz oy;bg *wu5g q( 92mzs9Five seconds later, the car is moving at 49zg9 e s5vw2bo zgi9(;q*ymum 0.0 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 motion?

  14.33: An object moves with constant acceleration start/mizi+loa( (a3f1(4hmcfq aeing 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;4 83f*zh8t /ac(zzccgfbx tq z+vs8n moving upward while in free fall. Which one of the following choices best represents the direction of the object’s acceleration duringbtsh88 ag zvc *;+3(znf84c cxfzt/zq its flight?

  13.26: An object moving only to the right completes a 20.0 secn q2e-o 3rxm rnn/x3+wond trip in two stages, I and II. The average speed of the entire trip is 1 nx- e rqro2xm3n+/3nw0.0 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 along ac;iyc ::serwnjl mj6zv 6b4c, ,.yq; x 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 accelerati s jyvz:cic :;,,x.q6e6jl;ybc4 rwnmon 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 from re:mgqc(sv *b:pst. 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 initibg:vcm: p(s q*ally dropped rock, what is the speed of the ball relative to the rock?

  16.36: On a straight road, a self-j21j 0d tlyyvz d5v;l/xsc/3udriving car races with a robot. The robot accelej3vy z ;x// c2ljvlu st105yddrates 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 yql+k9a* l-p vposition of 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 vertilyvkp+9-lq*a cal position that is one-half of the maximum height it obtains during its flight?