94.01: Starting from rest, 2.eg- wp kbnxo* z4)qvobject 1 falls freely for 4.0 seconds, and object 2 falls freely for 8.0 second np2k .bvo 4z*)wg-qexs. Compared to object 1, object 2 falls:

  94.02: A car starts from rest and unif m/ip2*dw,g 2ce5k tqjormly accelerates to a final speed of 20.0 m/s in ad, 2jctg5kpi2/*mwqe 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 velocity. It lands xejg q0o*gfe8h5b j:.6.0 s later with a velocity of 40 mxejgeh5q8*.j: fb0 o g/s. What was the initial velocity of the ball?

  95.27: A rocket near the surface of the earth is acceleratiqt x(8v/m(0ij 2rweya ng vertically upward ata e20( 8qixtm/ vwj(yr $10\;m/s^2$. 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 at one az 9;8ckurg,pinstant. If it continues8gkzr9;,pca u to fall, one second later the object would be moving with a downward velocity closest to:

  95.39: A car starts vkp9/7dgpn)z from rest 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 fromfeaak)yv*r-. the 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 *ya.r)ev f-ka approximately:

  97.09: At a certain time, jz1 8hzqz1rkzww d7p9g3 i-f 6an object in free fall has velocity 4.0 m/s in the upward direction. What is the approxim1hiz97qp1 w8 fgj 6z kzw3r-zdate velocity of the object one second later?

  98.14: How long must0gd t cl0v90 b9lvjdr hptr/05 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. Iuvn 5und;l28zx4my: s f it continues to fall, two seconds later the object s8nu x;25yz vnmd4l :uwould be moving with a speed of

  17.02: A small object is releas)xetlz*.hsu9 7asvd1s 2s)syz0a yo /ed from rest and falls freely for 4.00 s until reaching the ground. What was the heig0lah*d1s .)v) 9szozx s2 / tye7suasyht above the ground from which the object was released?

  11.06: A ball of mass =0.100 kg is launched stra:9s ra84h cewjight upward so that it rises to wj8rhca:94 es 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 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 szxc6p*xj*ri ; 04oxybo that it rises to a maximum o*b4p;0xx *xyjc 6irzheight 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 its launch?

  98.31: An object sliding down an inclined plane has sps;nm 52 cfnf: 9sgqki*eed 0.40 m/s two seconds after it begins to slide. Approximately how far does it travel in tg;fs f9mn 5:*q2k ncishree seconds?

  98.40: Coin I is thrown upward from o3rr i)pa hh 0yvulrnk 7 6jk5+ivj;4)the top of a 100-m tower with a speed of 15 m/s. Coin II is dropped (zero initial speed) )p0k4 rvnja) jh3;h75iluror y6kvi+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 thv;ngdrkkuy xk8*7o-0 e initial speed of another, how much h;vx*0kg -8yo n7rkukd igher will it be at its apex?

  02.30: A box falls to the ground from a delivery truckzo(kjej yqph.d; h 6ms7t mg6xlb54 64 traveling at 30 m/s. After hitting the road, it slides 45 meters to rest. How long doesj44( ;567oxlmbkhtpm6z6hq. jey gs d it take the box to come to rest?

  03.29: An object is thrown upwards witfj++i: op lduo1 k+t*uh a velocity of 30 m/s near the surface of the earth. After two seconds what would be the direction of the displacement, velocity and acceleration t+upokl:uo+ if+ *1jd?
displacement velocity acceleration

  04.10: Three stones sbptv 4e(rhkwk *o8:j8np7x k,(2rixof different mass (1m, 2m& 3m) are thrown vertically upward with different velocities (18hps8b ek ir(x xn7:to4jwvrp k(2k*,v, 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 negligible.

  10.25: Two point obje 3 fpflnxiek e*-76)ficts are launched straight upward with identical linear momentum. Object 1 has mass M and -6e ip f)f7*ikfxnl e3reaches 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 ?

  04.28: A rubber ball bounces on the ground as sho g3 4zo;+u*;bw1jsr jgn trf9qwn. After each bounce, the ball reaches one-half the height of the bounce before it. If the time the ball was in the airu4stjr 9ogwf+*qbrz ; n; g1j3 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 proj +wbtpd * 0jy(;zxw)exectile in free fall achieved its minimum speed during flight. If that minimum speed was 15ypbwde w (*xxjz+)0t ;.0 m/s, what was the projectile’s initial angle of launch from the horizontal?

  05.02: A pebble is dropped from a high ve;n n+u4iw,m(9kuuu kz rtical cliff. The collision of the pebble with the ground below is seen 1.50 seconds after the pebble is dropped. Withu+kzwmuiun9u(n,k ;4 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 st0 .o a2teb+cjjudent suggested that to determine the height of the garage, they simply had to drop tennis balls from the top and02a+tjjc ob .e time the fall of the tennis 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 /7:ku:t zu bbzinitial 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 p7 bubuz:k: z/tosition, initial velocity and acceleration, respectively, are

  04.38: A small point-xm 3a(jv 3+ :s0 ffwlajp8ywq;like object is 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 therl+pfmja:(q8vaxfs y w3w ;j0 3e is no loss of energy and that it takes negligible time.

  06.13: A rock is dropped fro1/9mhes7uktkf7 t;i em the top of a tall tower. Half a second later another rock, twice as massive as the first, is dropped. Ignoring air resifet7k s1 ;k9hte7 mu/istance,

  06.18: A cart is initially moving at 4ys*u5 8* me0jfenlo(pwtww(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 lfwsjmep (w*4e (*5 twyu0 n8oat 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 c p*oh huxbj 5 fh/)h3a62cq2noart comes to rest after traveling 1 m. The experiment is repeated on the same track, b)phf/5 bjh6hc hnxo*aqo 3u2 2ut 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 straight line with a constant acc5fqjs2tti,v rx;4 w-hele;-f,4q 5ixtwtr2hj vsration 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 initialjcdt.3 8ns3yy ly at rest falls without air 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 toyt3 c8ynj.d3s fall the remaining distance of 0.5h?

  10.38: Two objects both move o* qbp40 bl+lx w3ii0fand uniformly 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 in this time T by Object 2 to that traveled by Objectbo3wql*+ ipf bi4x l00 1?

  12.26: An object is thrown horizontally with sp1 la,miz d2.uveed 10.0 m/s from a height 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 fligh21um .adilz, vt to the ground? Ignore air resistance.

  13.10: An object is thrown straight upward. Tl*fl -htr3z u3he object remains in free fall until it returns to its initial launch point. Which one of the following graphs could represent the velocity of the object as a function of time during itr*zul-ft h33l s flight?

  14.03: An object is droppf,bys;258 f kgpj)gused into free fall. Through how many meters does the object fall during the first 3.0jsfyg sb52u fp, g8)k;0 seconds of flight?

  15.02: A box uniform 5qiyqkgr p4.ls+19gj-0 cxkply slides 7.50 m to rest across a flat surface in a time of 12.0 s. What was the initial speed of the box when it startesl0 -pc+19jprg5 kxi q. 4qgkyd its slide?

  14.07: Starting from rest, a cart uniformhspz f4 z2 vt3,t,f1eyly accelerates to a speed of 7.60 m/s in a time of 3.00 s. Through what dist v3tzht2f 41,zyfp s,eance does the cart move in this time?

  14.16: A toy car initially moves to the right at 60.0 cm/s. Five seconwg:1egnk4 x*j /1hmebds later, the car is moving at 40.0 c1jxg4*/k 1 gebhnw:em m/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 second motion?

  14.17: A toy car initially mov to7:- .gglqupa.g,w ies 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 choices best represents the magnitude of the average acceleration of the car during the i.w7to:au, q .glp g-gfive second motion?

  14.33: An object moves with constant acceleration starting with velo; ve:6 l smbpk.bxh3- lqyws+:city $v_0 = 5.00\;m/s$ 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 while in free fall. Which one of thev;aplvo -ai5ye ds9(*g k:mg( following choices best represe vilo(gs (gp*mevkd9y-: a;a5nts the direction of the object’s acceleration during its flight?

  13.26: An object moving only to the right completes a 20.0 b5anls9z i.-/ha 7waf second trip in two stages, I and II. The average speed ofbf/nlaaz7 .-hw95 sia 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 during the 8.0 seconds of stage II?

  15.32: An object moving along a lo k-oznt-(2poine 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 the right for 12.0 seconds. What constant magnitude accelero 2pzon -(t-okation 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 isv h6.njxeb ao))r:+mav (nxd3 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 vnhn+ d3b )am6raxev.xj: o() 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-drivin8f,m u0(t/ vpvvy 4yztg car races with a robot. The robot accelerates at 4vvuz /ymy,8tpf v0(t $8.50\;m/s^2$ 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 fka3pi i * g;:hx1dz0nthe 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 position that is one-half of the maximum height it obtains durii1* z3 ;gk0xhp:andifng its flight?