94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and /e nuu8,mi c9qobject 2 falls freely for 8.0 se ,q8ec/ 9iumunconds. Compared to object 1, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to a final speed of 20rxh0) m*fv xpoe5n z3e2;e9.4 ddmqwx.0 m/s in a time of 15.0 s. How far does the car traqoded39x*5) x4e 2z hf.wr;nmp0emvxvel during this time?

  94.03: A ball is thrown off a high cliff withqkc8sp2bo)r j1 :qiz( no horizontal velocity. It lands 6.0 s k1(o)qjqi prcsbz: 28 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 acceleratik3orwyt3dnxs k n 5ovn 8/:g(;ng vertically upward at (dn /ry n 8xk5so;w 3tk3ovng:$10\;m/s^2$. 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 2 ezla3qab: 46dmi*8cq7 m/s at one instant. If it continues to fall, one second later the object wou4 zm:3ceiq86d *qalabld be moving with a downward velocity closest to:

  95.39: A car starts from rest and acc(m7g.vf: xcs melerates 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 builhosv w(a+y1+ t0qhl/h-azi 2fding strikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of the building is approfqavz/hs(+y i w2h+ 1 o0lta-hximately:

  97.09: At a certain time, an objepg .4 ugjbntgwk-4;- wct in free fall has velocity 4.0 m/s in the upward direction. Wha4p.j;n-w tbgu4gk w-gt is the approximate velocity of the object one second later?

  98.14: How long must jeo .sy+b mjk,z(w)c. 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 s+g jln l6,8 cvqa90bvmoving downward at 18 m/s. If it continues to fall, two secondvbsl8c+ 9 ,vj0l nqa6gs later the object would be moving with a speed of

  17.02: A small object iatm/b4ubo. )ln 2h2 ccv f1(rls released from rest and falls freely for 4.00 s until reaching the ground. What was the height above the ground from which trtcua1 4c2bv( hbllmf2 o /.n)he object was released?

  11.06: A ball of mass =0.100 epru,z erx , 9/kq9bi;kg is 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 choir, /9rkx pe b9quiz,;eces 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 upwal wy3 )n m(me+v6ae;7snc0nc qrd so that it rises to a maximum height of 12.0 m above the launch point. Ignore air resistance. Approximately how much time does it take the ball to reach the maximum height from its launs6w+ 3 )cleqv( mm0nn;nac7eych?

  98.31: An object sliding down an inclined planus9 hcj4mg0p0.th knm5cvq*-e has speed 0.40 m/s two seconds after it begins to slide. Approximately how far does it travel in three secon 9jkqtg-.umhhpn4vc50c0m* sds?

  98.40: Coin I is thrown upward frt i8r4 w/nij9ppv 1d5eom the top of a 100-m tower with a speed of 15 m/s. pdpevnj i1/iw9 5t8r4 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 thrownub+:m) lg9 ark directly upwards with twice the initial speed of anothbma : gklu)9+rer, how much higher will it be at its apex?

  02.30: A box falls to the ampzl 9r-4wfwq :q+ah 78cy7z ground from a delivery truck traveling at 30 m/s. After hitting the road, it slides 45 meters to rest. How long doesya7 ah pqcwl+7:rm8-4qz9wz f it take the box to come to rest?

  03.29: An object is thrown upwards with a 5hp o;n,n41ndoq t 2dvvelocity of 30 m/s near the surface of the earth. After two seconds what would be the direction of the displacement, vevn5h dqdt4o; pnn2o,1locity and acceleration?
displacement velocity acceleration

  04.10: Three stones of dif2)k )xoq /ryiau(zw1 cferent 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 maximum height of each stone. Assume air resistance is negligicko2 1zyia/ wq)ur)(x ble.

  10.25: Two point objects are launched straight upward with iden27( hp; q,hgqlwhw bh;/yai+mtical linear momentum. Object 1 has hy b hg72wl hq; p,h+iawmq/(;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 on the groundgh(e ndfn2*he/3 p-b b 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 bou 3(-eg2nbfhnhb/ d*pence 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 minimur yduinikp9vk64n( srru0+ 42 m speed during flight. If that minimum speed was 15.0 m/s, what was the projectile’rip4(2d nsuykr+ 06r4u9ikvns initial angle of launch from the horizontal?

  05.02: A pebble is dropped from a high vertical clh yeqn pmq60.0iff. The collision of the pebble with the ground below is seen 1.50 seconds after the pebben6q 0hy.qmp0 le is dropped. With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about the height of a parki h,g5my mr,;ceng 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 seco5m ,cg,hyem;r nds, approximately how tall is the parking garage?

  05.07: A snail is moving along a straight line. Its init y(ewcqm7h;zc)-n .fi9uqv3a ial position is x0 = -5 meters and it is moving away from the origin and slowing down. In this coordinate system, the signs of the initial position, initial velocityfqea)izv c-c(wu9hm7q3 ;n. y and acceleration, respectively, are

  04.38: A small point-like object is pulled downwards by gravity (down thexy2o-)p7e s w.naad h. 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 b.dwhae7xnp .) s-ay o2e 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. Hl q0cztu58p- hf yw8,malf a second later another rock, twice as massive as the first, qlzhwy8 0-c5 u,f8tpmis dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s along a track. Thea bnlt4m;j t17 cart comes to rest after traveling 1 m. The experiment is repeated on the same track, but now the cnm 4l1jba t7t;art is initially moving at 1 m/s. How far does the cart travel before coming to rest?

  07.11: A cart is initially moving/ v fxj677wwgd 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 mxj6d gvf w/77woving at 1 m/s. How far does the cart travel before coming to rest?

  08.03: A dog starts fdws elh)rkg99,t f i-+rom rest and runs in a straight line with a constant acceleri,k)d+ -flghrw 9set9 ation 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 initiall idk8y)mxj7;vot, q3l:p:t o+a ya2 lvy at rest falls without air resistance from a height h above the ground. If the o lyatdj: k,at 7vp+8;2)3imy:lqx ovball 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 accew. ysioj5-p4d.7 y s 4zhjfu2ulerate to the right. At time t=0,the objects are at the same initial position. Object 1 has initial speed twice that of Object ju 5..ojp7-f4yisuhdzsy 4 w2 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 hvj(ibhy1(6 b 3-hvbjy orizontally 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 flight to t 3 1jvh(-(vb ij6ybybhhe ground? Ignore air resistance.

  13.10: An object is thrown straight upward. The object remains in free fall unti9m6c)wlqh th2z+ mdm +l it r6tm2c+9h )q +mhmlzdw 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 fall9; rbza9.agj nlf 4e8: ;sqnacuwmz6+. Through how many meters does the object fall during the firs6gfam nq;zwc89;z aa:eu 4jn s+rl.b 9t 3.00 seconds of flight?

  15.02: A box uniformly slides 7.50 m to r)t uu1zd9r ef)9ohp;xest across a flat surface in a time of 12.0 s. Wha zhxd 9rfu)t)ue1p;9ot was the initial speed of the box when it started its slide?

  14.07: Starting from res pk:ld 5)hb x7pspaum:2 f/(jst, a 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 thif5)as uxh:k/: 7jpppl 2(sbmds time?

  14.16: A toy car initially moves to the rig.tdxh; z suj0w-*lt: kht 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 dk 0*-d:s; jzttuhl.xwuring the five second motion?

  14.17: A toy car initial*zsak3 vdk1w/ wn1 p7h nsff83zfzs0,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 choices best represents the magnitude of the average 83n3nzw sf70hwfz/k fa1sv zd kp*1,sacceleration of the car during the five second motion?

  14.33: An object moves with constant acceleration fwlf k *8zn1v3mogx f1ig88d/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 initiall-t: 3u qb+s ql2-n eg1h5f5vwr lvust.y is moving upward while in free fall. Which one of the following choices best represents the direction of the object’s acceleration duri5 -l ss1vfhuw-3qg.:er+v nq2lt u bt5ng its flight?

  13.26: An object moving only tomn mrohfjh-89 ,j4,vo the 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 seconds. What constant acceleration must the object j-rf9jhom8 ,hv4n om,have during the 8.0 seconds of stage II?

  15.32: An object moving along ai 7w) zqzf.sizpxt 3(+ 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 acceleration directed to the left must the object have during the 8.0 seconds z(i. )f 3tzxz+sq7 piwof stage 2?

  13.33: At the top of a high cliff, a small rock0 gopfxu*we7u -m5626aili wd 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 further than the ow lfiau-* d2 w umgp5660xei7initially 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 robot.r1 7tf0 ,zzs-jt4jnib The robot accelerate-ns7zrj, jbzft 01t 4is 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 vertidkam- ng4 n)x8 :7hohvcally upward. The vertical position 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-half of the maximum h4 -mngk:aoh7 vnxh d)8eight it obtains during its flight?