94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and object f2ra: - kmcqii+7+ie y2 falls freely for 8.0 seconds. Compared to object 1, obmqr+yc7 ii+ 2akief:- ject 2 falls:

  94.02: A car starts from rest and uniformly acceler zkwtz::ty u 495wdpji*8th: lates to a final speed of 20.0 m/s in a time of 15.0 s. How far does the car travel during this time?:h5 4:: dkptzwt8uw9lt y*zij

  94.03: A ball is thrown off a high cliff with no horizontal velocity. It lands 6o*y.tls4 hykd** kv kse1.b4c .sekd1yyhst *bvl.* 4o* kc4k.0 s 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 accelerating v6mbu g/*g:b bmertically upward abgb u m/*6:bmgt $10\;m/s^2$. 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 m ktcx5s)- w.edownwards at 27 m/s at one instant. If it continues to fall, one second later the object would be movinek.swm- )cxt 5g with a downward velocity closest to:

  95.39: A car starts from rest1,ylqyl kt50v and accelerates 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 buildint hoh y( lx,+d8vp-rs6g strikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of the building is approxi6(d hlrt-8 +xyv,shp omately:

  97.09: At a certain time, an object in free fall has velo r-x ne-xbqa2p4wv/) wg 7d,mlcity 4.0 m/s in the upward direction. What is the approximate velocity of the object one seconwrm, bq-vd4-w g2/x xn)la ep7d later?

  98.14: How long must a s ewa42rks+z +d*/ vki9a.msn92 yovz $2.5\;m/s^2$ 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 itrb/pzc p:+ a(o 22bchi continues to fall, two seco2 b:(chrcbp+ a p/o2zinds later the object would be moving with a speed of

  17.02: A small object is released l+kp71y7pimo/r sn f5from rest and falls freely for 4.00 s until reaching the ground. Whm/+lys5 7ik7fpo p r1nat was the height above the ground from which the object was released?

  11.06: A ball of mass =0 xrq 9pgu+lu0y-.:t:67pxr*elpkx7 cithpv6 .100 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 choices best represents the magnitude of the net force actinp9q+: 7y l pkpgrp lu6xe.v0 curthx6*t x-:i7g on the ball?
D 10.0 N
E 12.0 N

  11.07: A ball of mass =0.100 kg6ht n2/emz jlqz .0:ob is launched straight 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 tak.l6m/etb0q :zhoj n2ze the ball to reach the maximum height from its launch?

  98.31: An object sliding down anjod.2 w6sc:33rnw:g dsa y /x8 oukw.d inclined plane has speed 0.40 m/s two seconds after it begins to slide. Approximately how far does it travel in three s.:.2rdwocuw sxk8d /s:w yg3d 3no6ja econds?

  98.40: Coin I is thrown upward from q,dv2fmi)0ni5 *4lh ogp2.qjzz1mb lthe top of a 100-m tower with a speed of 15 m/s. Coin II is dropped (zero initial spg*i qd.m o j2fi4h)2v1mqlzlbp z5n0,eed) 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 the initial sp 2aj(u+v +oxu.fv si0yeed of another, how much higher will it be at i2jifo0+ su+(vy.av xuts apex?

  02.30: A box falls tofp c+;qp pan4r+ hgm *es:lq-0 the ground from a delivery truck traveling at 30 m/s. After hitting rq n p+e: af+q4h;*csl0- mpgpthe 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 vel51di72o j:7nmjgr :vsec cdp5ocity of 30 m/s near the surface of the earth. After two seconds what would be the v nrd2jc77:d5:5so1pe jmg icdirection of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3m) are thrown vertflye y:0bl+p :ically 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 negligi yey0:l+blp :fble.

  10.25: Two point objects are launched straighrf:9r;u2* iy uen4qx d1xh e1u0p)zgdt 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 2M, what is its maximum attained height abov*np9r4: u;u d ) 1eq1xh2gydef0zr uixe the launch point in terms of H ?

  04.28: A rubber ball bo/7g ovf x0c:dsxtzm3hfrb bo46u- r/-unces on the ground 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 bounce was 1 second, what46 roz:u/ -cob3-mh gdv/x7tr bxsff0 would be the time between the second and third bounce?

  16.21: At 1.94 s after launch, a projectile in free f(i+ lwaeplzm/-;46oj (n bd.x xw;qdxall 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 td+ 6(xelww;4 d/iqpo;mzxxanbj(-l .he horizontal?

  05.02: A pebble is dropped from a high vertical cliff. The 0gi5+os3ng(6 owtuk b y i/tk5collision of the pebble with the ground below is seen 1.50 seconds after the pebble is dropped. With what speed did the pebble hit the ground? Ignorni(y s o/0kk5og63b+ g5 titwue air resistance.

  06.03: Three students were arguing about the hwrk w ,5a,0d mz52;c;an hmoybeight 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 seconds, approximately how tall ia0c;m2,yd mr;z5b,w5 nwhak os the parking garage?

  05.07: A snail is moving along a straight line. Its inh 4gkcarwj3;5 sg4c1j itial 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, init;r4wjgcg3k5 ahsc41 j ial velocity and acceleration, respectively, are

  04.38: A small point-like object i v+ob ukg0pb t1po988es pulled downwards by gravity (down the 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 there is no loss of energy and that it takes negligible timeppkv 88ot19eobgb0 u+.

  06.13: A rock is dropped from the top of a tall tower. Half a se 33 j+-*da8aniina+ qfvp0we pcond later another rock, twice as massive as the first, is dropped. Ignor+ aqpa*3wp+ -dfivn3 i 8nea0jing air resistance,

  06.18: A cart is initially moving at1z *4:le 5l.mjxyhr ao 0.5 m/s along a track. The cart comes to rest after traveling 1 m*lexh5:. z4lyjr 1moa. 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 tr+ eln-f8nip1r1nt o32l)p 4fctde s q)ack. The cart comes to rest after traveling 1 m. The experiment is repeated on the same track, but now the cart is initn 3+qs1tl2 c)ren8et4of1)-ip df lnp ially 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 a constgcx,txxpuk/axb 4 msh; hj15 (wq67+lant accelexh xxlh/bwmc gs4xtq6u+ 5p,7k;(a1 jration 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 rmu0 .nu( ;:sqk-n anoo1k4dki esistance from a 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 remaining distankq.knodam0;uko (nnui 1-:4s ce of 0.5h?

  10.38: Two objects both move and uniformly accelerat9n b:h+1jg/ke 9 afi:pa+.yd jdys r.pe to the 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 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 ts. 9.d+jpghaf di :k1aej9y/n:+ r ypbo that traveled by Object 1?

  12.26: An object is thrown horizontally with speed 1g.z7bhyss 3. y 0/kdwm0.0 m/s from a height H above the ground. The object reaches the ground with a speed of 20.0 gyz3.h.7 /yk b0wssdmm/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 s;apj o* pr6x9remains in free fall until it returns to its initial la; 6ps9r*op xjaunch 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 fall. Through how many / 2582axaufg:joj0;ap.jlk h mw h oq9meters does the object fall during the first 3.00 seconds of flig .lj;j o a / q29u:hxamohgj8awf205pkht?

  15.02: A box uniformly slides 7.50 2mxt lvg,iael2q,5 +zm to rest across a flat surface in a time of 12.0 s. W x+m eal22i5gz, l,tqvhat was the initial speed of the box when it started its slide?

  14.07: Starting from rest, a cart uniformly accelerates to a speed ofo22vmho5 li+l mbm:uwp*ud9 ) 7.60 m/s in a time of 3.00 s. Thrm2:uowv+l5h o*mp2 mu )ib9dl ough what distance does the cart move in this time?

  14.16: A toy car initially moves to the right at 60.0 cm/s. Five seconds laxma3bm44 jsh)fo9 13k(shb vk 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 best represents the magnitude of the average velombhok1fhkv b4m3)s sj93x4a( city of the car during the five second motion?

  14.17: A toy car initially m45/ )0ow7 k kxyc)qq7zayoa ajoves 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 chcwxa7)q7yj a qa/05o4o)kzkyoices best represents the magnitude of the average acceleration of the car during the five second motion?

  14.33: An object moves with constant acceleration starting wi,py)w pjo u-f-th 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 initial +y (ur3msh4yfs (a;lily is moving upward while in free fall. Which one of the following choice (r;fms3u(y4yih l+ ass 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 .yyo6 mtw(e r6trip 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 have duringry .ey66wo(tm the 8.0 seconds of stage II?

  15.32: An object moving along a line completes a 20.0wucve +.i (vkn))s/yff)h*l pd5iz7n 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 thp5 ).7y+/*dinsf)) vivfl zeuwckn(he 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 from rest. A(4gcz(p6p 1 ee 78sk7op gjnya ball is launched straight downward with an initial speed of 36 m/s at a time 2.10 s after the rockeen( kp6zy8ao4c 7jsp7 gp(1g 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 rock?

  16.36: On a straight 6bad x3 )kxh3groad, a self-driving car races with a robot. The robot accel akhg) x3b3xd6erates 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.61sov/:(2u uhgjrer v .c4vj j 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 positiv 6(1jou.r 24juvs egvr:/jhc on that is one-half of the maximum height it obtains during its flight?