94.01: Starting from res 3q,e itmm4(kpt, object 1 falls freely for 4.0 seconds, and object 2 falls freely for 8.0 seconds. Compared to objee3 mm,(it4 pqkct 1, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to / m dz;z9w*y;bhd t4o7su g 7i-edfb+ka final speed of 20.0 m/s in a time of eogd;tdm4 9ikzyfw;z7/hd-u + *7bsb15.0 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 lanrar b.0w:mmxa;brwu3zk*wu8c/ 6 u c)ds 6.0 s later with a velocity of 40 m/s. Whb.rurr x;zc:* mu/3k u6bwawm) w8a0cat was the initial velocity of the ball?

  95.27: A rocket near the surface of the earth isrq2+2 v .kans,yf hs)g accelerating vertically upward sn+ svhfag.2)2rk,q yat $10\;m/s^2$. 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 b n:l5bzj9nwn)e moving downwards at 27 m/s at one instant. If it continues to fall, one second later the object would be moving with a downward velocity j 5nbnnw):z9 lclosest to:

  95.39: A car starts from rest and acceleratejp-x;1jf4 * opq)j(h0 ltoaa ms 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 strikes the swjrpjm;950 myz *rcr(j :k 2fr:9bneground with a speed of 30 m/s. Assume air resistance ca pj;*2mbwmj0: kr:r(ejrr9n9fzcys5n be ignored. The height of the building is approximately:

  97.09: At a certain time, an object in free fall has velocity 4. +7(y81po/pe,5 jt gjhulmksq 0 m/s in the upward direction. What is t1 gqys m8kl /topj7 eh5(u+jp,he approximate velocity of the object one second later?

  98.14: How long must a-8pa 6wyv+nimxu,;; x+y nvvrq d,)qz $2.5\;m/s^2$ 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 u9fs:ri4j , 9azt(h (;xyzfy+j(mn tz moving downward at 18 m/s. If it conti iy,9z (x:fus4aht+;(jt9fn(z ymzr jnues 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 4.00 s inoi jmn* a/a3f2ezga. (y60n until reaching the ground. What was the height above the groundo2*y a30m6 ngnzaafnje(/i. i from which the object was released?

  11.06: A ball of mass =0.100 kg is l7slqfo ciint,10;v l3y,x,y9 yojt 8launched straight upward so that it rises to a maximum height of 12.0 m above the ;ii y,tl l17x9j,8ntsycy v03, oqf ollaunch 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 upw1phzdd: 64bgf ard 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 mdp4 b:1 dzhg6faximum height from its launch?

  98.31: An object sliding down an inclined pla5d0iaud axu+k1ws5 0 dw8 6aasv+e)05eqp qavne has speed 0.40 m/s two seconds ax0q iv+10 s5ad0 5v6qaae adu+ dsak5wu8ep) wfter 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 tow:/.jay3kwh c:bo- tzk er with a speed of 15 m/s. Coin II is dropped (zero initial speed) wobkchkt:/ 3.y-jz a: 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 up 4qr117osjf:ee 8-miol/lve o wards with twice the initial speed of another, how much higher will it be at its apex?41eeeol f vmj 8oilo1sq/7r-:

  02.30: A box falls to the ground from a delivery g.n-2e a qy42vv1 sg6tzyvnmvi+o0wp; 4 ovm,truck traveling at 30 m/s. After hitting the road, it slides 45 meters to rea;4y vq6 ie vy 2mmv1sw2vo4vo0+g-t,ngp.zn st. How long does it take the box to come to rest?

  03.29: An object is thrown upwards with a velocity of 30 m/s near l7s:n )zi3)wx9t eqfithe surface of the 3:nqx)is9zi f)lewt 7earth. After two seconds what would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3m)do znu10amd8bw;or1d o) .1 ta are thrown vertically upward with different velocio1w)mna b r1do8a0. duozt 1;dties (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 negligible.

  10.25: Two point objects are launche d/m g pzqidbjes35y4bl-o8;/d straight upward with identical linear momentum. Object 1 has mass M and reaches a maximum height H above the launch pointg pb q/4i /d-l;eod5b jz3ms8y. 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. Aftxt.9cvtke:p7 noo6o ;er each bounce, the ball reaches one-half the height of the bounce before it. If the cot: px9 .e ;7tok6nvotime 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 projectile in free fal*xqo0i) rj zv .23cufrl achieved its minimum speed during flight. If thq2ov z*rjrxiu) 0f .c3at 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 high vertical cl v4a s2mdqi ea26t1mx9iff. The collision of the pebble with the ground below is seen 1.50 seconds after the pebble is dropped. With what speed did the pt2saiv a d2m6 4x19mqeebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about the height *d4kllwe xtc -t:u*6vof 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 wwvdeu-6c*4 :*ltxl t kas 1.4 seconds, approximately how tall is the parking garage?

  05.07: A snail is moving along a straight linsm wo6wtj*; .2 j,ayfje. Its initial position is x0 = -5 meters and it is moving away from the origin and slowing down. 6.,mafj;wty sw o*2 jjIn this coordinate system, the signs of the initial position, initial velocity and acceleration, respectively, are

  04.38: A small point-like object is puim.3cql26hzazy hm 9r25 z5hy lled 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 chan22m5ml3.5i 6hzhyyzc h 9zaq rging 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 tower. Half a second later anoqbbjz7u9i63e;kvx(.ojp t-)d8c ccdh n*)lpther ij* ;9tcd-cqx j3oe6dvbb(huc7 8)).nk zplprock, twice as massive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0ic oyzczd4vsjfw)o, h5k).8/ .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. z.,kv5f)h)/8wdc 4z yojcso iHow far does the cart travel before coming to rest?

  07.11: A cart is initially kawihv 0 u.35 hbrxn1-moving 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, butbh av35nkuw-.0xh r1 i 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 ruw 6.h6n*nwg gti(p1lne d4 )fbns in a straight line with a constant accelerati( e ngdwbiw*.1tf6n 64nl gph)on 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 resistance k6pvmw 8x6 :syfrom 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 distance of 0. :xw p86s6vkmy5h?

  10.38: Two objects both move and uniformly acceler- prv7hcp(f //m*y,sxgsc h1:xo6tra ate 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-h asyv-/xcc 617,*(:h /horfxrtm p psgalf 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 from a height H ab4ucgspe * -18y vx:.mnkey 41 c cw)paw;gnae5ove the ground. The object reaches tac; us yng1*.- ek8eec wpa5v1): gxm wnyc44phe 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. The object remains *o6gb1rpy*yp*gd ,jsin free fall until it returns to its initial launch point. Which one of tg1* jpgyby, *o 6*prsdhe 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 meters doea e+e 77gkd1uv;o /qu/bx:alg)*vhfrs the objeco/g/vx*+:uud v7gh1 k7 ab ef ea;rql)t fall during the first 3.00 seconds of flight?

  15.02: A box uniformly sli qpy0,mxsl*5 :gryl5t des 7.50 m to rest across a flat surface in a time of 12.0 s. What was the l typm,*5 sy:xrql0g5initial speed of the box when it started its slide?

  14.07: Starting from rest, a cart uniformly a 2o3j3+e/nbf:ae.k us*mg n5g/ wftnp ccelerates to a speed of 7.60 m/s in a time of 3.00 s. Through what distance mtjgw.gso 2 n/ 3fe3n:n 5*p/fue kab+does the cart move in this time?

  14.16: A toy car initially moverep 9paatjg0 6uc *0*q5;sv tbs to the right at 60.0 cm/s. Five seconds later, the car is moving at 40.0 cm/s to the left. The tov95te*00q; acrpsuj p*bta 6 gtal 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 moves to theu;w6t f2 p2wo2z 2uaobew.9gd 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 cu2at6uoo2 gwp 2f2 ; .9dzebwwar during the five second motion?

  14.33: An object moves with constant acceleration starting with velocitym+rz1v li2 yl6 $v_0 = 5.00\;m/s$ 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. Whic*qad ze ;o3d7dh one of the following choices best represents the direction of the object’s acceleration a7;do3z * dedqduring its flight?

  13.26: An object moving only to the right completes a 20.0 second trip i+lsxvi ls.c2pa 9ti/)n two stages, I and II.l .i sipacvx +2s)t9l/ 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 during the 8.0 seconds of stage II?

  15.32: An object moving along a line completes a 20.0 seco hic0 pv3okh .d+n78/ f9zxlwvnd 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. Wo930hl .f8 +z i7px/vwv dcknhhat 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 2hlbm6yh/e o3 8hsgg: cliff, a small rock is dropped from rest. A ball is launched straight downward with an inbhl e mg2oh3h6:/ys g8itial 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 the rock?

  16.36: On a straight road, a self-driving cohu7g y6b hy5d z0:e2: y5qfosyi:edl0,dnb;ar races with a robot. The robot accelerates atu:5 y :z hohif ddl2nb e7qsg0oyy;yb,0d 5:e6 $8.50\;m/s^2$ 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 launche jg2m h)b*x kv3x4 a-gny8b7tbd vertically upward. 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 i bh )8nj3 t4yg*2gx-7bmxvakbs the object first at a vertical position that is one-half of the maximum height it obtains during its flight?