94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and object 2 f0 lfg:8;7jdd0h2e+ 15oly ic1xj szlav.onj aalls freely for 8.0 x5shj1jla +c2dlv0jygf7iood.a1 8l 0 ;zen :seconds. Compared to object 1, object 2 falls:

  94.02: A car starts from rest and uniformly acch2 w1n,gwi37nqtd dq)elerates to a final speed of 20.0 m/s in a time of 15.0 s. How far does dq2wgqw13dinh ,n 7 t)the car travel during this time?

  94.03: A ball is thrown off a high cliff with no horizontal vel(ow7cgv1e *wj ocity. It lands 6.0 s later with a velocity of 40 m/s. What was the ing7wcoj (1* vweitial velocity of the ball?

  95.27: A rocket near the surface of the egpy *d9i4teoi(jl+ ,marth is accelerating vertically upward agpd*i9o,j m e(+l tyi4t $10\;m/s^2$. 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 downwar;+3d)pal t;0o9 har wcv8jzqb ds at 27 m/s at one instant. If it continues to fall, one second later the object would be moving with a downward velocityajc9v oz);+qhp;dr3wb a t0l8 closest to:

  95.39: A car starts from rest and accelervtpgj6t 7 (k.zates 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 f8dm- l) si.hrlrom the top of a building strikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of r )sih 8.-dmllthe building is approximately:

  97.09: At a certain time, an object in free fall has velocity 4.0 m/s 8dm1xdf7 wlqxw+75 k pk-vgv-in the upwarw-w dx xp18ql7vdmv5g+f-k7 kd direction. What is the approximate velocity of the object one second later?

  98.14: How long must t0 tl+xxf 2pp4a $2.5\;m/s^2$ acceleration act to change the velocity of a 2.0 kg object by 3.0 m/s?

  98.15: A freely falling object is founf -. ) kkzzye/)tkib e21lao;7xjgp t8d to be moving downward at 18 m/s. If it continues to fall, two seconds later the object would bk ; -gelx18byp)i.7ftkjz/aztk )eo 2e moving with a speed of

  17.02: A small object is released from rest and falls ih5j+xf e 5)vpfreely for 4.00 s until reaching the groundf5+5v hjp)e xi. What was the height above the ground from which the object was released?

  11.06: A ball of mass =0.100 kg isf9vf : paw,slrjy4lu 5su7q4: launched 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 choices best represents the magnitude ouqr 5l4f9,ypuws f:av:47ljs f 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 rises ;.(3n zu ;ijrcs ;: csm.mezafto a maximum height of 12.0 m above the :mr ;af3n;ss;ce(mjzzu .i.claunch 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 inclinep eb)9r63.h51kquswp+tym/lnuo e:h d plane has speed 0.40 m/s two seconds after it begins .:tkunb mh/w oy1sphp r9)+ eu53 qle6to slide. Approximately how far does it travel in three seconds?

  98.40: Coin I is thrownwrj mb(b7+o 0d upward from the top of a 100-m tower with a speed of 15 m/s. Coin II is dropped (zero initial speed) from the top of the tower 2.0 s later. Assu+bmr(j 0dw7ob me 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 the initial speed o +1qqpv3wpwplsdc r b k0vwm-)(;1,uy f another, how much h;c 0vlpqyq(- 1bs1pw ),3+kvdmww pr uigher will it be at its apex?

  02.30: A box falls to the ground from a delivery truck traveling at 30 m/s. eceg*23vhpp3 k7 )c ubAfter hitting the road, it slides 45 meters to rest. How 3phpc7*c3euk2 b egv) long does it take the box to come to rest?

  03.29: An object is thrown upwards with a velocikfor . ,fol41hty of 30 m/s near the surface of ool,.kf4r1h fthe earth. After two seconds what would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2eoyyy r))qy gbqihq3ft 66pi794m -z3m& 3m) are thrown vertically upward with different veloci- 6ibfqyrt)piym3o3g9z)y 6 y4eq 7 hqties (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 negligible.

  10.25: Two point object*eh,*qo7 + sfh1 bovkjs are launched straight 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 jh*1b+vqko7f*hos e, 2M, what is its maximum attained height above the launch point in terms of H ?

  04.28: A rubber ball bounces on the ground a1hohvkh(n, 7t qkh5+vs 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 betweehtovv1h+(k 5,h qhk7nn 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 achie*jbc4a+x/go, hki9wzn4 m l/iyz8n:uved its minimum speed duri9/ b4zkwh:xliicym/ag j,uz+o*nn48 ng 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 vebh*f d*p52.- h94 hl; iwp fts3rmhqrequ-2vtrtical cliff. The collision of the pebble with thqwm95r;ht-l2 q*v ie f.*-u3sb 2f4rphhh ptde 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 t1xd*7/9-mc.ii goxm,ff te fthe height of a parking garage. One student suggested that to determinei/-t f197gmo* emxid ftx,fc . 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 initial position is x c1 cijj*33xlquhe8w)p5 *ttp0 = -5 meters and it is moving away from the origin and slowing down. In this coordi x1i*t) 8lcqcjjwu3t5* ppeh3nate 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 plwk-;e ,ypoj)0 x.pfkd2c(segane 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 ofp)0g p w(f-s .doxyec ekjk;,2 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. Half a secgbsbk112.jtebx9hl .8 (i vbiond later another r1gb9812.bl vtbbshi k(e x ji.ock, twice as massive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0r yjs;*p*(m ,-xny7,rnk4tv oha:ia s.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. Hojir*x:antn4rvsa7 o;,k -hy p ,sy(*mw 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 to0x;ndfy n9vikfirxvz5 v7,)j3q1w*q rest after tr1 vi37qnwf;) kzd5q, yr9v0i *nxvxjf aveling 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 with ai 8rh qf2c w2-)epmc(13 juqc/xake s( constant acceleration(/ pes m8 j)uiwq 2k1qhcar(cx2ec-f 3 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 initialwf-p;8q tk w:)jala+ lly at rest falls without air resistance from a height h above the ground. If the ballkla f;pq8 )ltja-+w:w falls the 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 accelerate to thy (v2 -wvk4kooe right. At time t=0,the objects are at the same initial position. Object 1 has initial speed twice that of Object 2; Object y2wko (vokv4- 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 horizontally o *jtpt .i g.aoq,e6n3with speed 10.0 m/s from a height H above the ground. The object reaches t ogi,q no6pe*3atj.t.he 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. p/cb0cj*jjh l m; 0sw:The 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/*jjcpj:w0ml s0 h ;bc time during its flight?

  14.03: An object is dropped into free fall. Through how many meter f2 9(fo-go)-m c 4arwap.;qim0yoxzp s does the object fall during gw)(4ra.fmoq x;90m c-i-aoz p opfy 2the first 3.00 seconds of flight?

  15.02: A box uniformly slixasb3 xrx7-ub-typ 80des 7.50 m to rest across a flat surface in a time of 12.0 s. -3 t x7yur0-b8ab pxxsWhat was the initial speed of the box when it started its slide?

  14.07: Starting from rest, a wda3.si-;r qk*hm1a2fm.qp a (yirg *cart uniformly accelerates to a speed of 7.60 m/s in a time of 3.00 s. Through what distance does the cart move in this ti1 sq ya(2gfarmahkw-*3 mp. *;qi.rdi me?

  14.16: A toy car initially moves to tyupr3d- q -b2lhe 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 average velocity of the car dqubp-y2dr l3- uring the five second motion?

  14.17: A toy car initially moves to the right at 60.0 cm/s. Five-u)d4owjk*,jm jvgv2 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 acceleration ok o)jdvj 4v*g2,ujwm-f the car during the five second motion?

  14.33: An object moves with constant acceleration f*p,dj koq.ets:4 vl b5*d5v ostarting 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 whiis:1hcgtn 8i 53ya0b7/nwp mole in free fall. Which one of the b giwah801/snt53 7opcim n :yfollowing choices best represents the direction of the object’s acceleration during its flight?

  13.26: An object moving only to the right completes a 20.0 second trip in two sthf/txkj:/mi :ages, 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 seconds.f:jki xh:/ /tm 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 20uf7k,k6 ih)qq.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 le6q, kuf7i)hq kft 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 rest. A ballr9* u4- e7;ogv5q (ccxol-ulmaaqp6uf sg (-j 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 ba 6fxul57-q v*m gjlc49a eorsuaogcup-( ;q (-ll relative to the rock?

  16.36: On a straight roay wlg86y l7ni1d, a self-driving car races with a robot. The robot accelera86 y1 7gwllinytes 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 posi4(xpstekz2.8: nq vq ttion 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 vertical position that is one-ha(xts8n2qe .pq:4 kzt vlf of the maximum height it obtains during its flight?