94.01: Starting from rest, object 1 falls freely for 4.0 seconds,) *a rzf u(iwqq*-/spw+)menm and object 2 falls freely for 8.0 seconds. Comparedaisfq)r(znmu ww+e /-q)p*m* to object 1, object 2 falls:

  94.02: A car starts f mz,s.lqk uog8l6:dm4rom rest and uniformly accelerates to a final speed of 20.0 m/s in a time of 15.0 s. How far does thes,4gzqldu 8. k6molm: car travel during this time?

  94.03: A ball is thrown off a high climtezv sy)stc4 sv)//* ff with no horizontal velocity. It lands 6.0 s later with a velocity of 40 m/s. What was the initial velocity o/sezv )sy ct/ tvm4s)*f the ball?

  95.27: A rocket near the surface of the lobv o39;8ati earth is accelerating vertically upward at t9ivo;8albo3 $10\;m/s^2$. The rocket releases an instrument package. Immediately after release the acceleration of the instrument package is:

  95.13: A freely falling body is found rv85.zcy+bj*hhs)p ito be moving downwards at 27 m/s at one instant. If it continues to fall, one second lacp+s8v *hbh z. yj)ri5ter the object would be moving with a downward velocity closest to:

  95.39: A car starts from rest mm.9p t r,w:lrand 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 a building strikeswtggiurg8ln/0 (a--jz s u (;k the ground with a speed of 30 m/s. Assume air resistance can be ignored( kg8jwu( szgtu-rlg-na0;i/ . The height of the building is approximately:

  97.09: At a certain t 831xv)v0cqfzr 7w qluime, an object in free fall has velocity 4.0 m/s in the upward direction. What is the approximate velocity l)qxc3 7vrq0fzw1v 8uof the object one second later?

  98.14: How long must a36p ulf3mk:fy $2.5\;m/s^2$ 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 downward mbfp2u. a (g+nqjnmx 4c.3l,t at 18 m/s. If it continues to fall, two seconds later the pcn 2fm+na(l,.3tg. ujxqb4m object would be moving with a speed of

  17.02: A small object is released from rest and falls freely for 4.00 s untix5 fnwc+h*xmz3-c/ ,ish/j g pl rea-,+xhm sfix*5 wc/hn gc p/3zjching the ground. What was the height above the ground from which the object was released?

  11.06: A ball of mass +sxtzq,e qv1*=0.100 kg is launched straight upward so that it rises to a maximum height of 12.0 m above tqx1+z vq, *teshe 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 + qrt2exb1ll 2l )tm2a=0.100 kg is launched straight upward so that it rises to a maximum height of 12.0 m above the launch point. Ignore air resistance. Approximately how muchl+qea2x1 bl2) 2t ltrm 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 0qz )9gzn ,ni/wgav/0i .40 m/s two seconds aw zzni 9ga )g0qnv/i,/fter it begins to slide. Approximately how far does it travel in three seconds?

  98.40: Coin I is thrown upward from the top of a kp s57rr. ikh8t/oq+qu rz/jb,qb3wyn69vw; 100-m tower with a speed of 15 m n. 5 k;,rvkr37 b/+yiqrhj6zwpq 8sbu9o t/qw/s. Coin II is dropped (zero initial speed) from 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 up.jhan ,c(0l)t nlyk1 )z.vspqwards with twice the initial speed of another, how much (s lh a kz1ynqc.t, 0))nv.ljphigher will it be at its apex?

  02.30: A box falls to the groundqevx:l5c. sa9 from a delivery truck traveling at 30 m/s. After hitting the road, it slides:9.e aqlcsx 5v 45 meters to rest. How long does it take the box to come to rest?

  03.29: An object is thrown upwards with a velocityt g2jvcwwq cv5v3t+20ztc31c of 30 m/s near the surface of the earth. After two seconds what would be the direction of 0 cwtv2gw z+2v3351qtctccvjthe displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (,c;-qxtu h rrdt2w8 slz*u-e 11m, 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 maximum height of each stone. Assume air resistance is negligi lxq2e- uurhz,ts*;c-8 r1twdble.

  10.25: Two point objects are launched straight upward with idk e5,w.(nqei pentical linear momen,(5qewenpki . tum. 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 the launch point in terms of H ?

  04.28: A rubber ball bounces on85d.k1r5 lf+ sv*xs rpvuk.i,jlmik5 the 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 bouncmvi+s.85ukx pjls.r*dk5f,1 lrk i5v e was 1 second, what would be the time between the second and third bounce?

  16.21: At 1.94 s after launch, a projectileezto8+) 3yw yf in free fall achieved its minimum speed during flight. If that minimum speed was 15.0 m/s, what was the projectile’s initial angle of launch from toyftw +z38 y)ehe horizontal?

  05.02: A pebble is dropperi0f ) sx::r3mznpns ,d from a high vertical cliff. The collision of the pebble with the ground below n :rnmxip,3srzsf):0 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 ar;v 28jq vk) (occ h*dcjpyt47kguing about the height of a parking garage. One student suggested that tcvjkv4( h2ktodp)7q 8* jyc ;co 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, approximately how tall is the parking garage?

  05.07: A snail is moving along a straight line. Its initl,+ 5ui pyplz6ial position is x0 = -5 meters and it is moving away from the origin and slowi5+p ,y6zpulling 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 downwar 4mlvmhxqs (;4* cdudou2y ;66:mvh4o(r yaavds 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 chanv6*o;l6mcd xm4 yasr; o uyh(u:2(dm4q v avh4ging 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. Half a sed 6j* kn; e 9kk0uib/l8zwuxb/cond later another rock, twice ab9/xiz;kw 0*6uudn b jkelk/ 8s massive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.v ojer: +-zoyi3(h: z*sgwyy.5 m/s along a track. The cart comes to rest after travel:jy(owh +vio s z y.-eg3r:*yzing 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?

  07.11: A cart is initially moving at 0.5 m/s along a tra r/ksqm; lz 5-/is8ixvck. 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 rz5m/ kq;ilxs-8i/r v sest?

  08.03: A dog starts from ;:e6vviamxztnj s.(4cbb: k1rest and runs in a straight line with a constant acceleration6.c nxtav(b:sj4v1eizb: ; km 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 initiav3* 3(e xtctuvt ab,zh -d5uh:jy cj/+,lkf) ylly at 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 timyut ch cxba/3*f5 ked,v,h)-:t 3juty zvl +(je is required to fall the remaining distance of 0.5h?

  10.38: Two objects both move and uniformly accelerate yrkj,buf8i+; to the right. At time t=0,the objects are at the same initial position. Object 1 has initial speed twice; r+iyfuk8, bj 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 hori69nancm,,-y f+t i ifrzontally with 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 object’s fcrf,+t iy9nm,nf6i a-light to the ground? Ignore air resistance.

  13.10: An object is thrown straight upward. Th, kn*x1z d*a-3 nq/7smxdjpkz,t 9kdr e object remains in free fall 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 timk1d37kj, m*n-katdpdqx9 x* r nzz /s,e during its flight?

  14.03: An object is dropped into free fall. Through how many meuzjsh, 6 8iz3k8 :7sqvx,ydtdters does the object fall during the first 3.00 secondsv7sx:zd8 ,6 3 kd,i8uytzs hqj of flight?

  15.02: A box uniformly slides 7.50 m to rest across a flaqz.btcwxe87 dy;d1 (j t surface in a time of 12.0 s. What was the initial speed of the box when it started .(;cde z 7ytjb81wqdxits slide?

  14.07: Starting from rest, a cart unin /as5r;pi-bn //9lbs msdu5 pformly accelerates to a speed of 7.60 m/s in a time of 3.00 s. Through what di nm5 ;/-59banspi psu sd/b/lrstance does the cart move in this time?

  14.16: A toy car initialyp y+l jn8 st4uofiv,0o-r,d;ly moves 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 +o lip,fj8 4;tu0 dsryy-von, 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 rightg+z8cej1 soddx1u9x+h8 3)eq 2 uw lxi 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 resw89 lug8+zdcq joi)+ 2u1 1ex3x hedxpresents the magnitude of the average acceleration of the car during the five second motion?

  14.33: An object moves with constant acceleration starting with ve e3tgtp(y7z ke0xop,*3dwvd5 .z0p t zlocity $v_0 = 5.00\;m/s$ 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 of t gw;+),onc immhe following choices best represents the direction of the object’s accelerati,;o)nm+c i mgwon during its flight?

  13.26: An object moving only to t r()q8to* 0gzwwb kzw0he right 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 moves with a constant velocity of 6.0 m/s for 12.0 sebr*0w wt o zzk)8q0(gwconds. 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 20.0 sew -i7srjzs,pt3 wv0u r* +*)pj+vi6 rr3a ejvrcond 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 1-vj ,+e rrw*uajir)+ s*vr7 iv6 rw 0tz3js3pp2.0 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 hig jrznt/de8yxvjqb3sjbq : e*h8.41r ,h cliff, a small rock is dropped 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 fur *8 /8zj:r .,txjsebqv 1 ej4hd3bqnyrther 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 roly3,v3 cvww/sbot. The robot acceles3wwv/y ,c 3vlrates 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 bf,d520 -gfumq+: at:dxgd2k 1kgcaithe ball 0.70 s after release is the same as its vertical position 4.10 s after its release. At what time is the objem 12c ua dgkdf: f0bigtd:x2 k+aq-g5,ct first at a vertical position that is one-half of the maximum height it obtains during its flight?