94.01: Starting from rest, objec4o) p(j+m*yz1 xwglqu5 gmli0t 1 falls freely for 4.0 seconds, and object 2 falls freely for 8.0 seconds. Compared to object 1m )ozq40gmli yugl+wp *15(j x, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to a final speeel z,bq-s ;3mvd of 20.0 m/s in a time of 15.0 s. How far does the car travel during thiqm b-lv ,;sez3s time?

  94.03: A ball is thrown off a2zk 7 f0+j gbpqw3 8p)f.phqme high cliff with no horizontal velocity. It lands 6.0 s later with a velocity of 40 m/s. What was the initial veloc) j+ 8fh pp.0 b7km3qeqwf2gpzity of the ball?

  95.27: A rocket near they8ol j01z1 1or ir qy:y0ep rr5tlo2i7 surface of the earth is accelerating vertically upward o81olrez 0jyoyri1 pr2: ilt1 07ry5qat $10\;m/s^2$. 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 dgyx+tp/v(3;a3gx ue2z x( kwzownwards at 27 m/s at one instant. If it continues to fall, one second later the object would be moving with a downward velocity 3 axp(txku/ze+ g3; xw(gz2vyclosest to:

  95.39: A car starts from r bv sx;3ntnk-qn* w82zest 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 th)6 yd 4:wsklzce top of a building strikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of the building is approx :zsk)l cy6wd4imately:

  97.09: At a certain time, an object ilte;b(uave9 y vc5z.jpj.,b,h.cs 2on free fall has velocity 4.0 m/s in the upward direction. What is the approximate velocity of the.9, j c.up2tv j.bo,elesy bzvhac5(; object one second later?

  98.14: How long must1cg48n. jmi3zckp z -u 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 moving downward at 18 m/s. If ismf 32g,(x 2 .jq sn-kixdkqoq pmx3497 vpn:at congipx: 3 7 42 x3.pfmqx2qdqmjk,k -(ssa vn9ontinues to fall, two seconds later the object would be moving with a speed of

  17.02: A small object is released from rest and falls freely for zjz*xjx4u7ch.n - /wl4.00 s until reachinzjz7.lj/-hw4 nc ux*x g the ground. What was the height above the ground from which the object was released?

  11.06: A ball of mass =0.100 kg is launched strqu zo ai2;h 93,q31wct9sjmcl aight 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 onewc1l qct3h;osm 3u zq2ja9,9i 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 straight upward so that it r1666ab owlj mqises to a maximum height of 12.0 m above the launch point. Ignore air resistance. Approximately howo l6b6amw q16j much time does it take the ball to reach the maximum height from its launch?

  98.31: An object sliding down a+zt a1c,jqf ece-w 0(mn inclined plane has speed 0.40 m/s two seconds aft (t,0w +jfmzecc1aqe -er it begins to slide. Approximately how far does it travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m tower with al9 (tb, ,mrqrcrhhw6.o9ypk. speed of 15 m/q,,rcm6 lh.9.rb 9r tky hwop(s. 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 thr +6wb lig5ahqvd5v4ko :79ua rown directly upwards with twice the initial speed of another, how much higher widlq6vk 5h avg wb4a oi+7u:95rll it be at its apex?

  02.30: A box falls to3zqas9r /: gvr the ground from a delivery truck traveling at 30 m/s. After hitting the road, it slides 45 meters to rest. How a/szrvqr: 39 glong does it take the box to come to rest?

  03.29: An object is thrown upwards with a velox 7jle9mnnh(c d/uvi2*h 2e 1ecity of 30 m/s near the surface of the earth. After two seconds wh e 7jnel9c2dh2hm ne( uix*v/1at would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones o qh wi,6yg 4(3w6fi8ukm7lnby f different mass (1m, 2m& 3m) are thrown vertically upward with different velocities (1v, 2v& 3v respi8q hluyb kw(fi6,m6g3 yw7n 4ectively). 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 objects are launched straight upward witf7;qod yq r/yz 1tf.knqo6o6,h identical linear momentum. Object 1 has mass M and reaches a maximum heigno y71frqf66 oq ty/,zd;o.kq ht 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 ground as shown. After each bou2vochqxq0,p. nce, the ball reaches one-half the height of the bounce before it. If the time qvq2,xhoc p 0.the ball was in the air 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 launchctmc ck7 k*(iz t3d ti4.du36rwxv:r., a projectile in free fall achieved its minimum speed during flight. If that minimum speed was 15.0 m/s, what was the projectile’w (murk6zvc t..*dt c:ti334ikdrx7cs initial angle of launch from the horizontal?

  05.02: A pebble is dropped from a high vertical cl ,jvb8im kh iie1ra2o*nz2g/n*:t1uoiff. The collision of the pebble with the ground below is seen 1.50 seconds after the pezuio28v n/1oe ,r2jb*gi* 1akt in:hmbble 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 parking garage. One 2uxd1dj f z7i . w.tlv93zuz.sstudent 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 thjid fw1 dl.s2zvz7u3tux..z 9e 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 position6w6ej)ldb dv n9cw/z t2w lduby)/y-6 is x0 = -5 meters and it is moving away from the origin and slowing do edd/zlb/yww2dc6vlu69)6yn jt-)b w wn. In this coordinate 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 (do;i+dy ea c-fcfe7:(1 .cr b lgj,qiaj,wn the plane of the page) but is constrained to exactly follow each of the frictionless pathways shown. Rank these three pat; -l1cg.,jiabeqa+fd fy (crji :7e,chs 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 time.

  06.13: A rock is dropped from the top of a tallq8lqc *-14 ol78j-n bxwnqsm m tower. Half a second later another rock, twice as massive as the first, is dropped7jwl -* m1qcno8b -xnlq smq84. Ignoring air resistance,

  06.18: A cart is initially moving at 0. 7+ v ianxrk3bb5c ;r6 (xsy:cu(jz,vt5 m/s along a track. The cart comes to rest after traveling 1 m. The experimen zkrxb(6v xr+ba;nyc ct5s:(7, 3ivj ut 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/5inf wb;j pvmbr)1q* 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 ; /wb*)rimjvpq b 5fn1m/s. How far does the cart travel before coming to rest?

  08.03: A dog starts from rest and runs in a straighaxcph 0,a kaq1z5e7 5wt line with a constant acceler05,e xkh1 pcwqaz 7a5aation 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; binhmb k,ntxe3f i 3sw1984qy at rest falls without air resistance from a height h above the ground. If the ball fall3s4, f3 hmik19eqwntb n;bi8xs 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 0-sbnete k ef l.98lpt3 j-6hpuniformly accelerate to the right. At time t=0,the objects are at the same initial position. Object 1 has i-p tf-jp0 eeb9 6tsk lhen.38lnitial 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/s fr*zg)0g ypxz c1c,jb7com a height H above the ground 7cbc )*cjgg py1xzz0,. 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 the ground? Ignore air resistance.

  13.10: An object is thrown straight upward. Thq/s-9x+p1tb *:rbky dl l((ev, uixnoe object remains in free fall until it returns to its initial launch point. Which one of the following graphs could represent t(1l,nsoyqvrb:lk(d *9-eiu bxp/+ xt he velocity of the object as a function of time during its flight?

  14.03: An object is dropcp;m3lqm2 0qs(r4 oh pped into free fall. Through how many meters does the object fall during the first 3.00 s3rqs ophqcm(0 p2 4ml;econds of flight?

  15.02: A box uniformly slides 7.50 m to rest acroso9zwn6 ,nq,ze.a8icf2 lx x7is a flat surface in a time of 12.0 s. What was the initial speed of the box when it startedfcxxa,z w82.q6z,li9e 7n ino its slide?

  14.07: Starting from rest, a cart uniformly accelerates to a speed of 9n9zf ysyzoc.cb3em;)5q 3 co7.60 m/s in a time of 3.00 sf 93 ccboye3on9;ysq 5) mcz.z. Through what distance does the cart move in this time?

  14.16: A toy car initially moves to the rw-c+a1a r9 b2yf n8jppight at 60.0 cm/s. Five seconds later, the car is moving at 40.0 cm/s to the left. The total displacement of t-yb2wjcn p8+ fa1pa r9he 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 second motion?

  14.17: A toy car initially moves to the right at 60.0 cm/s. Five sdks:3h x*9x vpeconds 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 the93k:d*psxv hx average acceleration of the car during the five second motion?

  14.33: An object moves wicw(( n cf *02l*cu x:aycrhvz)th 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 initia5qcnr f+nap1/i 7 x;9wyph matz+rw48lly is moving upward while in free fall. Which one of the following choices best represents the direction of the object’s acceleration durir89wfq c pp+ nmy+/75x a4nrh;ti 1zwang its flight?

  13.26: An object moving only to2 qh76wb :rshy 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 constaw: 2rhq6b 7syhnt acceleration must the object have during the 8.0 seconds of stage II?

  15.32: An object moving along a line completes a 20.0 second trip9 ass,*pq pcco,;cz+n with an average speed of 10.0 m/s in two stagescac c q*9z pp,,sso+n;. 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 of stage 2?

  13.33: At the top of a high v58*grs xnef 9 vl6g w1:ps*jlcliff, a small 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 baw*s6s5 xgnv r e9 fjp*l8gl1:vll 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 road, ai.bub)2ifqg3ljh*. 3 o6mods self-driving car races with a robot. The robot acceleratesmig l).*h.js3bi 6ouq o32dbf 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 tecl04,dfrwim .u t21dsud3j /he ball 0.70 s after release is the same as its vertical pos 1ir/ 0esd fu4d3l2,umc.wt jdition 4.10 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?