94.01: Starting from rest, object 1 xk4+ms2ukvyh 3czh;2 falls freely for 4.0 seconds, and object 2 fu;h s+3mxycvh 24zk2k alls freely for 8.0 seconds. Compared to object 1, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to a final speed of 20.2gn; tus:8 pao0 m/s in a time of 15.0 s. How far does the car travel du2p; no8ga: tusring this time?

  94.03: A ball is thrown off a high cliff with no horiz8)pqn4-xb x fnontal velocity. It lands 6.0 s later with a velocity of 4nq) -f8bxnxp40 m/s. What was the initial velocity of the ball?

  95.27: A rocket near the sur m2)w+n c66-ljp)efea:e; mbssn bzb )face of the earth is accelerating vertically upward a l 2jwb)zs6m be6cfm-es ne+)a;)p :nbt $10\;m/s^2$. 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 mo cc 9dava7g f1b4f/a2vving downwards at 27 m/s at one instant. If it continues to fall, one second later the object would be moviv7b / 49fvaafag1d2cc ng with a downward velocity closest to:

  95.39: A car starts from rest and acceleri fo)ph.tg:2 pates 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 bus4j/ kb74 zpadilding strikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of the sa47 bpj/zkd4building is approximately:

  97.09: At a certain time, an object in free fall has velocity 4..fh/ori7x * kz0 m/s in the upward direction. What is the approximatozifk7 * .h/xre velocity of the object one second later?

  98.14: How long must a yab13xf6 pgi0 $2.5\;m/s^2$ 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 do hn)ft2:t dz8xwnward at 18 m/s. If it continues to fall, two seconds later the object would be moving with a speex:d 2nht8t )fzd of

  17.02: A small object is released from rest and falls freely for 4.00 sm,xnyzz t028s until reaching the ground. What was the heightns mt 20,z8zyx above the ground from which the object was released?

  11.06: A ball of mass =fix 9n(v- /ldl0.100 kg is launched straight upward so that it rises to a maximum height of 12.0 m above the launch p (lnfl/ vdi9x-oint. 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 =0.100 kg i1forof,9wlvxe q;u v)7.: brks launched straight upward so that it rises to a maximum height of 12.0 m a.e,ou)vrrf k:o f7b9 xl;1qvw bove the 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 down an inclined plane has speed 0.w+x*vi);*9: g auiitv7ho ma t40 m/s two seconds after it begins to slide. Approximately how far ao:)u g*hv*;ti axi9m+ 7viwtdoes it travel in three seconds?

  98.40: Coin I is thrown upward 86rse 4rjfk4(f.ib op from the top of a 100-m tower with a speed of 15 m/s. Coin II is dropped (zero initial speed) from(4rrfkb4 j6ioes8f. p 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/7 qlhphvqt. j 57/b4ut ctznh3umt5. upwards with twice the initial speed of another, how much higher wl 4t3j.pt m7/7 qhth5b5nu/cvt hzqu.ill it be at its apex?

  02.30: A box falls to the ground from a delivery truck traveling at 30 m/;ni13mamm;ap s. After hitting thm1 nama;mp;i 3e road, it slides 45 meters to rest. How long does it take the box to come to rest?

  03.29: An object is thrown upwards with a velocity of 30 m/s near the sj;w-mq5b)v l6vrg7 zv urface of the earth. After two seconds whwgv m;v67)bz5q-vjr l at would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3m) are thrown ver u5)wj:y /iruktically upward with different velocities (1v, 2v& 3v respectively). The diagram indicatejr:uiuwyk/ 5 )s 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 objects are launched straight upward with identical linear mkxy2; tvm* ye 175kcnhk, al7pomentum. 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 ?v5npck khatk7 m*;y1ly7,x2e

  04.28: A rubber ball bounces on the ground as shown. After each bounv / xyk-swd 8ia47(qw:.harx2 nqc*r tce, 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 t8:ra tvkd4 q.(xwyxsa/ * -hicr 7wnq2ime between the second and third bounce?

  16.21: At 1.94 s after launc8 iunp( mdu97 s3zjzv:h, a projectile 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 thidu8z9z7 s (j3: umnpve horizontal?

  05.02: A pebble is dropped from a high vertical clxntd8 9xb+n *3:0wog3 si zpgviff. The collision of the pebble with the ground belo sio3:n8vz b9g*xp +0dw3ntx gw 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 e)lnuqxk 7ta6u)zpm;a(7g0 l 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 u )gpelan xzua067q; () tkl7mtennis 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 l7;altzk2e3x4f qvod; ,yoy- 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 velocity and acceleration oyv7fqlyx2 ,-ed;a4zkolt ; 3, respectively, are

  04.38: A small point-like object is pulled downwards by gravity (down t.b8o8p nlmn )xhe 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 chabnp).m xo8nl 8nging 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. 8ja+(es ytydt9 -h. ppHalf a second later another rock, twice as massive as the first, is dropped. Ignoring air resistance,y+dp9a jt(thsy p.8- e

  06.18: A cart is initially moving at 0.5 m/s along a track. The ca* k3 ncao105nrh8 outcrt comes to rest after traveling htocacn80o uk*r3 15n 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 track. . q k1y.cxe8wyThe cart comes to rest after traveling 1 m. The experiment is repeated x.qykw1ce.y8 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 runosw wo 8om2i7c edmlu)qt 57/(s in a straight line with a constant accelerati/sw (8idtcw7qm5loemu2) 7ooon 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 arrjpc+adb f* x;e mo 6v1hz+n*h::ja0 height h above the gdm6:bjn p:a x *rohcr+evh + j1za*;f0round. If the ball 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 ut0d)1n6 1s/aw c tmu twc7iv4sniformly accelerate to the right. At time t=0,the objects are at the same initial position. Object 1 n4ct0vc iawt7/w um6ds )11tshas 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 Object 1?

  12.26: An object is thrown horizontally with speed 10.0 m/h:vz ofu3txr2m:3 zr+2f tz7;q 0rji hs from a height H above the ground. The object reaches the ground with a speed of 20.0 m/s. Which one of the followmffhh2 o: 3xzj7t2+i:qzz ruv30 r ;tring 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 fwb1 j6)2 sznz bvbc)5remains in free fall until it returns to its initial launch point. Which one of the following graphs could represwz2))51j c sv fbznb6bent 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 mvg9l1 t9vsw pw3/v0aba 5zl2meters does the object fall during the firs3gpavllw va0w9/ 5vmts2 9b z1t 3.00 seconds of flight?

  15.02: A box uniformlyk8( 2fq4mu hxn-gk8n*, d akyw slides 7.50 m to rest across a flat surface in a time of 12.0 s. What wag qa8,dk- 24 8mkx*w hnuynkf(s the initial speed of the box when it started its slide?

  14.07: Starting from rest, a cart uniformly accelerates to a speed of 7.60 6 b2cwb3wyhw, m/s in a time of 3.00 s. Through what distance does the cart move in this timebwwyb3h w26c, ?

  14.16: A toy car initially moves to the right at 60.0 cm/s. Five seconds latl- 7dpow97fg peaj7*6 m0i nuiq 3ct(ter, 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 bpnqu3wo p0j*79e6lc 7(mi7t tf dag-iest represents the magnitude of the average velocity of the car during the five second motion?

  14.17: A toy car initially moves to the right at 60.0 cm/s. Five secondx3y - rwe/it,*j1zw. nz p+wvjs later, the car is movizewny/ p+ v3ij-,wz jxrw1*.t ng 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 five second motion?

  14.33: An object moves with constant accel ; i1edko5x51monriq 2eration 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 movingflf4 rf6y 5 0p2wo9okt upward while in free fall. Which one of the following choices best representskffyrpf6 45o90wolt 2 the direction of the object’s acceleration during its flight?

  13.26: An object moving only to the right completwd9fu4kh* a 59eh ,(l9 blxaudes a 20.0 second trip in two stages, I and II. The average speed of the entirku5f d94 9 exahad l*9(u,bhwle 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 have during the 8.0 seconds of stage II?

  15.32: An object moving along a line completes +opek3uzt y- ;lm n) vz6lgr,e52s .xia 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 magnitu2zs xn6pe;ol5, v-eyrt3u)+il . kg zmde 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 swp8h3q 6,z gm r0.tzgtmall 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 further thggm3 .6 q0tt8rhzwpz,an the initially dropped rock, what is the speed of the ball relative to the rock?

  16.36: On a straight roa5c3aiwohy:ov.5 c+n wd, a self-driving car races with a robot. The robot accelerh3wc.w:+yonav ic o55 ates 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 vertieh fz*1(ln s)lcal position of the ball 0.70 s after release is the same as its vertical position 4.n(sl eh1fl)*z 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?