94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and q;su3 4 pczul;object 2 falls fq 4p;z;culs 3ureely for 8.0 seconds. Compared to object 1, object 2 falls:

  94.02: A car starts from rest and uniformly f;jx ypbaic5j8 5:)q xaccelerates to a final speed of 20.0 m/s in a time of 15.0 s. How far does the jjc;iqaxxf 55p:b 8)ycar travel during this time?

  94.03: A ball is thrown off a high cliff with no horizontal velocity. It laau3-kf2ir, wvnds 6.0 s later with a velocity of 40 m/s. Wk ,ir-3vawuf2hat was the initial velocity of the ball?

  95.27: A rocket near the surface of the sb8xk .tj 61 66m:h*hlacdc igearth is accelerating vertically upward at d 66bh. lgi1j*katx8h6cs c m:$10\;m/s^2$. The rocket releases an instrument package. Immediately after release the acceleration of the instrument package is:

  95.13: A freely falling boh/gm :,iq cix l nt6zt*/3pn(kdy is found to be moving downwards at 27 m/s at one instant. If it continues to fall, one second later the object would be moving with a downward veloz,/l pxnm(in: tiq3/gc hk *t6city closest to:

  95.39: A car starts from rest and accelerate1e5hmo6(n9 f7k hmvffs 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 st)j;oall+ (v- rmd w09aznh2warikes the ground with a speed of 30 vmwnrla+awa;0j z-o9 l)2hd(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 velocity 4.0 m/s 0s6o i7 ,i* 0tybuaponin the upward direoab60s0o7i* y,n utpiction. What is the approximate velocity of the object one second later?

  98.14: How long must phl xwco*z,26 a $2.5\;m/s^2$ 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 at 18 m/s. If 7 s;crmp)g p k*lny0l*+ize,vw 7d3lxit continues to fall, two sdl7 7 n)m,ex+ yllc p;*zpisg3v*kwr0econds later the object would be moving with a speed of

  17.02: A small object is released from rest and fallsoi(wu5( cb qh,l:ow8 o freely for 4.00 s until reaching the ground. What wwu,l(ic5 (:8 obwho qoas the height above the ground from which the object was released?

  11.06: A ball of mass =0.10i(u)ebd(4ty s0 kg is launched straight upward so that it rises to a maximum height of 12.0 m above the launch point. Ignore d( )t 4ybusei(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 straight upward so that it rjf xsm5 nmm6f x1-x:)lises to a maximum height of 12.0 m above the launch point. Ignore air resistance. Approximately how much time does it take them)jmxm:sx6-f1l5 fn x ball to reach the maximum height from its launch?

  98.31: An object sliding down an inclined planvs al k,w/pa989b x7 zxxv5js1o35yhbe has speed 0.40 m/s two seconds after it begins to slide. Approximately h/,ahvby7wpaj13ols85 k95 bxxxszv 9ow far does it travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m, .fi-u3el byrs7tzlo7h7zg a8;zr i. tower with a speed of 15 m/s. Coin II is dropped (zero37rz ;,u ihoagzb-z.lyis.7 f7le 8rt 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 upwards with twice t,70 f;, (le(vxz;7cnbhbye3hazjgx8xe gh z +he initial speed of another, how much higher will it bgghn7fez (cya8vb, ; ej0h zbhex,7(lx3+ ;zxe at its apex?

  02.30: A box falls to the ground from a delivery truck traveling at 30 mo6f;uj vu ( jj88qq:ik5dfy2x /s. After hitting the road, it slides 45 meters to rest. How long does it take the box to come to xiqj8ufvk(d5j 6 ou: j2f8;qyrest?

  03.29: An object is thrown upwards with a velocitt0;ev5 nbzcqh 7cc/0ny of 30 m/s near the surface of the earth. After two seconds wh/ch z0nc5qt7n 0 ;bvceat would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mwww/j k 8g*rghtbm(w)6 d hf;pa. ym4.ass (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 maximum height of each stone. Asdfy am4.wkgt wwbg /pwm)j;rh. 6*8(hsume air resistance is negligible.

  10.25: Two point objects are launched straight upward with identical linea:9ebz-buq 7a :db5ev fr 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 attained height above the launchqb b59ez:eda7 ufv-b: point in terms of H ?

  04.28: A rubber ball bounces on the grns-h6vsjrr3f*g) - r oound 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 n3rsgfhsvr)--o r *6jfirst and second bounce was 1 second, what would be the time between the second and third bounce?

  16.21: At 1.94 s after la*h *t04jen ue+1xfdrf f5soc .unch, a projectile in free fall achieved its minimum speed during flight. If that minimum speed was 15.0 m/s, what was the projectile*1fnujdo+ f t.0r*e 4cx5sh ef’s initial angle of launch from the horizontal?

  05.02: A pebble is dropped fros- hw fz* 9yxwwb9u4 49fzrnm0m a high vertical cliff. The collision of the pebble with the ground below is seen 1.50 seconds after the*xwy 9muwh9fzf9b nrz-sw0 44 pebble is dropped. With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were argui.yt7. /rtf -99t0xs h,nrx:jvh+kjk cqfx*rcng 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 seco+qctjjv9t *.kxk7r r ,sn:x c -9fh. 0ht/yrxfnds, approximately how tall is the parking garage?

  05.07: A snail is moving along a straight line.. q:tvnkp9ov(j xv5.,)ahqea Its initial position is x0 = -5 meters and it is moving away from the origin and slowing down. In this coordinate system, the signs of tev(.xv5)atokhqan p: jq.9v, he initial position, initial velocity and acceleration, respectively, are

  04.38: A small point-like object isigqjwd1ia: 0veomb (60 g6* el pulled downwards by gravity (down the plane of the page) but is constrained to exactly follow each of the frictionwa *m6v6de bq:i0oil( 10 jgegless 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 of a tall tower-nn 2 xa8ptmmjf:+tsd t- 4rk5. Half a second later another rock, twice as massive as the first, + -ndt2-n: a5 4tsptfmxrkj8mis dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s along admku 9+2o,o io track. The cart comes to rest after traveling 1 m. The experiment is repeated on the same track, b,2o kuo+m id9out 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.. o0 y0yxpg i0h,rnww80uo t2oyw )he,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 befor)wy ue .h0orwx0pyn20t g ,80oyo hwi,e coming to rest?

  08.03: A dog starts from rest and lx*ofj0o)/cnzr +3 l7nr. wm-xkp:lyruns in a straight line with a constant acceleration of 7lrjoo n/r*) xm0. fcnlz xl:p3w +ky-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 ahpu :+/kiavmr p. fp:8 height h above the ground. If the ball falls the first distance 0.5h in a time t, how much time is required to fall the reu+/ mv :.h:pk8prfaipmaining distance of 0.5h?

  10.38: Two objects both move and uniformly accelerate to the vay( zg5f13hz 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 accelera3yzz51( afh vgtion 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 w6. b65c wh c+zdblkky3ith 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 fd356k bk bzlcc+w6.y hollowing 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 o:g;o.g1*fkmw4qxk 2g 4l bcunbject remains in free fall unti;w:u .lg*gk fx2g q4mo 4kc1bnl it returns 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 dro72pyt-v n myc 4g-g/uvpped into free fall. Through how many meters does the object fall duringv ycg-p4/yn7gt m2-uv the first 3.00 seconds of flight?

  15.02: A box uniformly slides 7.50 m to rest across a flat surface in a time ofxrku89 q)cw) :cq flwzaq(x86 12.0 s. What was the initial speed of the boxc fx( 6quklw8x9wa 8) qrqc:z) when it started its slide?

  14.07: Starting from rest, a cart uniformly accelerates to r 8x;izgb;)oscq 5rm(* s+2caq;b kb wa speed of 7.60 m/s in a time of 3.00 s. Through what distance does the carm+(oc;cbi8krr;*2szbg q b5 xs;qw ) at move in this time?

  14.16: A toy car initially moves to the right at 60.0 cm/s. Five secondshw, hd /t4epm cr,p8-1dj yr,z 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 velyh8w,d hdprzt1,p4- c/jrm,e ocity 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 laf6af/:a7 rbhtter, 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 acceleration of the car during the fif h7ab/r:fa 6tve second motion?

  14.33: An object moves with const1uv d*2ku0 xqo xyf.m6ant acceleration 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 mk51znoa8ir4p5z -e i1paw8r roving upward while in free fall. Which one of the following choices best represents the direct5p1iz k8arznr5i -e84wa1 orp ion of the object’s acceleration during its flight?

  13.26: An object moving only to the right g qcwisl60n u lq4c::q8m yi:8p6 0zwccompletes a 20.0 second trip in two stages, I and II. The average speed of the entire trip is 10.0 m:lp6 wizi:ucg8wc8ys4 nc:6q0qlq0 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 a line completes8khaoei+,o p; a 20.0 second trip with an average speed of + eko; aoh8,pi10.0 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?

  13.33: At the top of a high cliff, a small rock is dropped): utsbkc) t9z 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 initially dropped rock, what is the speed of the ball relative to the roc s)ttku:9z b)ck?

  16.36: On a straight road, a self-dr.b orx1 8t3gaiarwqqp0), (0wh b-rz yiving car races with a robot. The robot acceleraty xi)0w8.r( -bwa1 pbh3t aqorrqgz,0 es 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 upwara/dgvy wl/uw z3.b9o(d. The vertical position of the ball 0.70 s after release gu (9/ww3 z ol./dbvyais the 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?