94.01: Starting from rest, object a 9uvtisf;6 pdfb9w611 falls freely for 4.0 seconds, and object 2 falls freely for 8.0 seconds. Compared to object 1, object 2 falls:d t af9 sv6b96fipwu;1

  94.02: A car starts from rest and uniformly accelerates to w3.m6 xlzll zb )7zg6aa final speed of 20.0 l3)7.wlzzm 66a lzgbx m/s in a time of 15.0 s. How far does the car travel during this time?

  94.03: A ball is thrown off a high cliff with no horizontal velo9*a;,m)-dos(nfb/xu k c gai ycity. It lands 6.0 s later wiy-faisxu g m; 9,(bk/ocnad)*th 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 accelerating verti*6bfc *9 yvjvdcally upward a*d9jf*6vv b yct $10\;m/s^2$. 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 27 m/s atfd3zezquz - rq57mc(xg0 , rw* one instant. If it continues to fall, one second later ther0zfr7x *-d (wzqgme,q uz53c object would be moving with a downward velocity closest to:

  95.39: A car starts from rest and accelerates z f6 l+ -vewma;88g-jag.ewj yat $0.80\;m/s^2$ 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 drobn9ypd/p +tc9: n v+y4/ pmaqe7zc)lhpped from the top of a building strikes the ground with a speed of 30 m/s. Assume air resista9nnbld94+p ha 7p+p):cc/qty/mv ze ynce can be ignored. The height of the building is approximately:

  97.09: At a certain time, ainfp2 9w 6shwj0.)y:jd exg1jn object in free fall has velocity 4.0 m/s in the upward direction. What is the approximate velocih:ijweg6. xjpdf9s 01ynj 2)w ty of the object one second later?

  98.14: How long must a zm7.gsxp) fi,:, q(ep/ z( v7yrsweqf$2.5\;m/s^2$ 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 +5j 6a puobny*moving downward at 18 m/s. If it continues to fall, two seconds late* jnpu+5a6obyr the object would be moving with a speed of

  17.02: A small object is released from rest sv dwfy+1ecnyg6 9-0yand falls freely for 4.00 s until reaching the ground. What was the height above the ground from which syfyy1v e+ wdg069-ncthe object was released?

  11.06: A ball of mass =0.100 kg is launchlkaq-/ 2fn9g 3colj5yed 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 afcqj yo93l2l-gn/5k 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 straightg, wfgh,7f 4trnks91k upward 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 itsg,wgnr4sf1k k,h97t f launch?

  98.31: An object sliding down an inclined plane has speed 0.40 m8 kv5pjt zo9d vorx9.vja; (x4rz1 ps1reg i+*/s two seconds after it begins to slide. Approximately how far does it 9a v.4(jg8p+xeiov rtz pdk9jxo 1rr;s*z15vtravel in three seconds?

  98.40: Coin I is thrown upward from the top of a 1g5 1 xfrp-yh2oo u7q-r00-m tower with a speed of 15 m/s. Coin II2qrp-gyf ro1u7 xoh -5 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 upwards with twice t p8 muau,y)jn-he initial speed of anoth8jm -uanpu,)y er, how much higher will it be at its apex?

  02.30: A box falls to the ground from a delivery truck traveling at 30 m/s. Aftp u+xgjz58ndt1)iz ,. s.lt nger hitting the road, it slides 45 meters to rest. How long d l jnpst5+x.1 8tzgzi g).n,udoes it take the box to come to rest?

  03.29: An object is thrown upwards with a velocity of 30 m/s nexmp*7z-jzo3p prk+cy 3heb8 8ar the surface of the earth. After two 8r+pey37zz* xo3b m8kp jc h-pseconds what would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass fwon :a *ju)) t/udj fm9.qa n2gg7n ld+f1s-c(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 resist ta2q+. /l7d)nduwjf:f)na9f gmj u-1 nsgc*oance is negligible.

  10.25: Two point objects are launched straight upward with identical linea:raiu* fz(pkvh . 6h*gepe2 d.r momentum. Object 1 has mass M and reaches a maximum height H above the launch point. If object 2 h*ih upgke. rdv: a.(*6z2f hpeas mass 2M, what is its maximum attained height above the launch point in terms of H ?

  04.28: A rubber ball bounces on the ground as s 3qqhz9+ye)tv hown. After each bounce, the ball reaches one-half the height of the bounce before it. If the time the ball was in the ai qvq3)ez9y+t hr between 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, 6hrmem,4)lw2gg d xy -;ysco9 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 launce,y cmx gmdrwg;6) h9o24-ylsh from the horizontal?

  05.02: A pebble is drpz j2r)2-x)3cle :0aoo:ch:gsovflb opped from a high vertical cliff. The collision of the pebble with the ground be:ol)bcc2ros0 o3l) hxpe a: j-f:z2gvlow 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 height of a p/8sm ) u-ybf m3s5pbmfarking 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 b pm/ msff-b y8bu3m5s)alls. 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 c tb+ gez0fw59sox/s7+ wnf,ais x0 = -5 meters and it is moving away from the origin and slowing down. In this coordinate system, the signs of the in7g9 s/ws,t w+c5+f fabzx0oenitial position, initial velocity and acceleration, respectively, are

  04.38: A small point-like object is pulled downwards by gravity (down ta4x owddnl19-:8bi ckhe 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 changing direction that ther9 ixck -41bdl8adwon:e 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 second2 9o* sss,s;j+q srekqf2jl- y;a;z tg later another rock, twice2y lgefsj*-2+q,srq ; t9;saskj zs; o as massive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5l+ j0in ucp0:m 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 initp0:+lnmucj i0 ially 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. The cart comesw s j-o1qqrvh0jb +99n to rest after traveling 19qosr 9+ j -bjhvnqw01 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 straiehelh5+ t(9t2 ml sbh0 *v5gbb7du y;rght line with a constant acceleration of h57lhbt vt e+ l5dumbeh2b9*;ryg( s02$.5\;m/s^2$. 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 fremrqc y6tp8kch fsalm+qp9c +p9 8.33om a height h above the ground. If the ball fal 3te mpk.a ccs9986 qycr8pfp++mqh 3lls 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 the right. At time t=0,3ny6cbnzd pzi 6 rr (ra/d4;-qthe objects are at the same initial position. Object 1 has initial;-ipbn zrd/qa4 rr 3(6 6czydn 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 n) ikns9:b 6. +xfydjc10.0 m/s from a height H above the ground. The object reaches the ground with a speed of 20yfikj6n.s nxd +9:)b c.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. The object remains in free fk/fiuv;b8 ,i:xa, afd-(gya fall until it re xguf v;8-,y,ia/i bf(f:akd aturns 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 droppe/yew0qj6k pfje t;,0j d into free fall. Through how many meters does the object fall during the/ewjq ky f ;6p00tjj,e first 3.00 seconds of flight?

  15.02: A box uniformly slides 7.50 m to re2+6ygu s- 2zfa4pqsfq st across a flat surface in a time of 12.0 s. What was the initial speed of the box when it startedgfupa q yqs2z4+2f6- s its slide?

  14.07: Starting from(8* 0r.(mzegu bbrr*s (ulbfy rest, a cart uniformly accelerates to a speed of 7.60 m/s in a time of 3.00 s. Through rbgr(*r8bu(u0y f(b m.sle* z what distance does the cart move in this time?

  14.16: A toy car initially moves to the right at(r+t2 t,7dcjvli z-x7wg egg - 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 during the five d-2ttvg7zg gc-l (re7 x+wji, second motion?

  14.17: A toy car initially moves to the right at 60.0 cm/s. Five seconds latel7 9b ,qwq tf/t0dyc)rr, 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 five seqytc d) /9lq07tfb,wr cond motion?

  14.33: An object moves b4wy,+iyz, a + xbl1mqw3iz l0nkha9 (with constant 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 mots7*6;).s/n3mc rblgh scs gz6 em:f gving upward while in free fall. Which one of the fo; l7ft:hcsnm.6g3s s s /cz)6gg bme*rllowing choices best represents the direction of the object’s acceleration during its flight?

  13.26: An object moving only to the r)8ab)wa7*lar/yzbdn t n4apvl 7a +7fight 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 4b)fpt7nlr 7vlaa /n7a*+bay8 dz w)a 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 complet rffdyy-a ndl7 8eocyk, ,ax5:+nu;d:es 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 dire kndaulend 5;yf8,+dxy ro:,yfca7-:cted 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 shzo98iua9d2 j*ve7 9knc7 c yymall 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 28voy eci2au*7czny99 9 k 7hjd8.0 m further than the initially dropped rock, what is the speed of the ball relative to the rock?

  16.36: On a straight road, a self-drivi07-amqn+vg*az jy us y6)xyy 8ng car races with a robot. The robot acceley y* j70 u6yagz+ -qayv8nmx)srates 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 the ball k+/ k r+:p24v rw3bv icicnog*0.70 s after release is the same as its vertical position 4.10 s after its rr/32*kibgc+ orv+vwic:p n4kelease. At what time is the object first at a vertical position that is one-half of the maximum height it obtains during its flight?