94.01: Starting from rest, objeca07spq*qf eu(mpk ,i /l 37ecat 1 falls freely for 4.0 seconds, and object 2 falls freely for 8.0 peuk(faa07ei pq*,/3cms 7 lq seconds. Compared to object 1, object 2 falls:

  94.02: A car starts from rest and ub0f , u ;nnma o7+okwkkbz9.3hniformly accelerates to a final speed of 20.0 m/s in a time of 15.0 s. Ho0onnb;k,bu whk mza+3kf . 9o7w far does the car travel during this time?

  94.03: A ball is thrown off a high cliff with no horizontalcf ls)ov8;r 6y velocity. It lands 6.0 s later with a velocity of 40 m/s. What was the in68 );l cysfrvoitial velocity of the ball?

  95.27: A rocket near the surface of the 74(asohgbry-(us0r4ikz 5b2me 0wmm earth is accelerating vertically upward at or -ry hwksu(a7g(0z s5b4e0 24mbimm$10\;m/s^2$. 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 atqt6f 0ta u6;a 2dw6hbk awu0-x 27 m/s at one instant.dxbaa66 0qtua-w 0;ht u2 w6kf If it continues to fall, one second later the object would be moving with a downward velocity closest to:

  95.39: A car starts from rest and accelenr.9: j 1ada bbxdgp4r3a45ws 4 jop5wrates 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 building strike10 hwcx ,atnqq4a75 wis the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of the building is ap,140h7cqiwxwaa 5nq tproximately:

  97.09: At a certain time, an object in free fall has velocis,, ezvks l5e3ty 4.0 m/s in the upward direction. What is the approximate velocity of the object one ,ess5zk lve, 3second later?

  98.14: How long must sywiahocf vj/) 9w;l(m:dzyn u9: ;;ta $2.5\;m/s^2$ acceleration act to change the velocity of a 2.0 kg object by 3.0 m/s?

  98.15: A freely fallin5ev nx7pogheqm(qu,qi2 7 ( erga:f65g object is found to be moving downward at 18 m/s. If it continues to fall, two seconds lato 2v,p5gxnr(u7a iq(:7mh gee65qefqer the object would be moving with a speed of

  17.02: A small object is released from rest and falls freely for ;f , (hav 3 .)uku)gmki6p1vxyev i:ex4.00 s until reaching the ground. What was the height above the ground from which the object was releas i6.ygv,x1k(av x:f ; )v)uhek3pumeied?

  11.06: A ball of mass =sf 91bilaxhm)0j. a* ,9bqn fd0.100 kg is launched straight upward so that it rises to a maximum height of 12.0 m above .i*nm s,bq9 9hlaaf1)df0x bj 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 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 rises to wmp/a:; zhfyv (.b4fa a maximum height of 12.0 m above the launch poin.zvafybp/ahmw 4( f ;:t. 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 hkgpmhyxag387s-+ r k5as speed 0.40 m/s two seconds after it beg-8ka gms k5xpy 3hgr7+ins 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 tej31 k +lxhh:uower with a speed of 15 m/s. Coin II is dropped (zero initial speed) from the top of the tower 2.0 s laterekjuh x+l1 3:h. 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 direc0f:/-akem7xlgsr mmw 5y ;l1 *guw(dctly upwards with twice the initial speed of another, how much higher will it be at its am;1/ ew *wdk7fuxl(s-rm :alcg 5 0mygpex?

  02.30: A box falls to the ground from a delivery truck traveling akg)2vn7/pe z 8 yuea9pt+ z3zst 30 m/s. After hitting the road, it slides 45 meters to rest. 8pnz zeu/s 29vkt ey7z)a+p3g How long does it take the box to come to rest?

  03.29: An object is thrown u9b6su wfgfvrgb05dl;l gfu y2 ) 0r/+rpwards with a velocity of 30 m/s near the surface of the earth. s9bf)rlr/;+ gufr0wb d ug yvf2l 50g6After two seconds what would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones ounsw+ ;7 tm,*du vxnhr)aj2i8f different 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 v) a;nxd7m*u2 ijrtuw8 ns+,hhigh to low the maximum height of each stone. Assume air resistance is negligible.

  10.25: Two point objects are launched straight upward with identical l3h l:ae2xg3z61f ptf tinear 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 above the z2lgtxa3 6teh1pff:3 launch point in terms of H ?

  04.28: A rubber ball bounces on the ground as sh63hsm xlohi;d26ul3iown. After each bounce, the ball reaches one-half the height of the bounce before it. If the timu6x dhi 63im2;3lh lose 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 launch, a proj9zpf(ub-bb 75q )sc,urn6z jjectile in free fall achieved its minimum speed du(n6)p - zju,bjuc7s q5frbz9bring flight. If that minimum speed was 15.0 m/s, what was the projectile’s initial angle of launch from the horizontal?

  05.02: A pebble is dropped from a p pfu35lr znd (3jo9,thigh vertical cliff. The collision 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? Ignore air rt dolzr(f3p,5 j9p3nuesistance.

  06.03: Three students were aoug0aisbmr2a2(z:-pec 2 u a 5rguing about the 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 tennis balls. If the time for the ball to fall was 1.4 seconds, approximately h(02 2baga cse -rm up:ioua5z2ow tall is the parking garage?

  05.07: A snail is moving along a straight line. Its initial position is x0 =gq/w,3bf b,qxj)a8(. h(yrihqu q+k r -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 accelerawqf.3i (k/,a,qj x(hy ruqhbg+)q b r8tion, respectively, are

  04.38: A small point-like object is pulled downwards by gravity (down th2lqh- 8qixf 1be 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 fromlqbq1hxf 8-i 2 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 towercy59k 3sv3tb 9pnb uw+. Half a second later another rock, twice as massive pn9vb+uk 3y9tcs b53 was the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s along a t,hx9xee.c lr6d pih. 1 3hhxt2rack. The cart comes to rest after traveling 1 m. The experiment is repeated on the same track, but now the cart is inl2h.xh3d9,pi xx.c rhhe6et1 itially moving at 1 m/s. How far does the cart travel before coming to rest?

  07.11: A cart is initially moving3 l7pvjw )4 tox*gkc3s 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 moving at 1 m/s. How far does the cart travel bef lpo34xtk3w7 sj*)vgc ore coming to rest?

  08.03: A dog starts from rest and runs in a straight line wituw0t *n+ u2p;/3 nf f, i)4qjmybztqqqh a constant acceleranqqyzb iq/pmu30t+) q*t jfu,24 n; fwtion 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 air2gxks:a *nlw e+(no( mc3u+on resistance 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 distan uow(2 +mn:(3c*xlenas k+gonce of 0.5h?

  10.38: Two objects both move and 9rm w o2de97u,bhm 2dtuniformly accelerate 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 in9o 29d 7,umbhw 2remdt 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 from a heighrwak;p e -kgvj*7.w0j vnc 3 k -8rtlz5ei*ny;t 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 the ground? Ignore air resitn c .5ki*ge ;w3-wrnvz0- rejvkya8;l*p j7kstance.

  13.10: An object is thrown straight upward. The object remains in free f(xhxwr7),1m;ybj. a (yrsi/ u4zdsxc all until it returns to its initial launch point. Which one of the followib j7ayxy,rm ;s( 1 )h/. (drxzicuws4xng graphs could represent the velocity of the object as a function of time during its flight?

  14.03: An object is dropped into ;lmzj2 tddd6xsm 5dk74k-p r 6free fall. Through how many meters does the object fall during the first 5zlxdjmk476d6 dk r;smptd2-3.00 seconds of flight?

  15.02: A box uniform *g k9zm me;8u9uasno/wqpg +,ct-t1qly slides 7.50 m to rest across a flat surface in a time of s p z8;qmt*na-/g9kuue ,gm1cq9wo+t 12.0 s. What was the initial speed of the box when it started its slide?

  14.07: Starting from rest, a cart uniformly accelerates to a speed of hlh7wd5k :v,)b ,chzj 7.60 m/s in a time of 3.00 s. Through what distance )bjhc hdz,5kl w:h,7 vdoes the cart move in this time?

  14.16: A toy car initial5i();wne xq f r bd3*4sfbh)yomc.u:vly 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 ofbbn3q*(c s)h:xy furv;)e w 4mi.f5od 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 mov cag)39pmlqd +es 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 cgqa) d mp39c+lar 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 acceleration starggac0ay 3m1c(g:6q* 0vehu 02akeb qrting 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 moving upward whdchkp xw-e3*3ile in free fall. Which one of the following chhde *k-3x3w pcoices best represents the direction of the object’s acceleration during its flight?

  13.26: An object moving only to the right meywqd)oe h8lrg , )-rln*a i3/klq20completes 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 constant3oqla lr qh0ilk, /w 8d2)ney*re)mg- acceleration must the object have during the 8.0 seconds of stage II?

  15.32: An object moving along ahs,5zrv (-llr 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 thezr-slrlv5 ,h( 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 n:46ir0+ vm*gss81ay n ugamxau31 kl 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 initially dropped rock, what is the speed of the ball relative to theuum vli8rk*ga1413 xas0 6mn +: syagn rock?

  16.36: On a straight road, a sel:2 mdia6 27xq )rh rxejp9jy5xf-driving car races with a robot. The robot accelerahqy5: 2xx)67 am9dxjer ripj 2tes 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 ver g h5qqamigl 7*pb81o8tically upward. The vertical position of the ball 0.70 s 5im8qqlp1h8og*b7 gaafter 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 height it obtains during its flight?