94.01: Starting from rest, objec3q(e 7 i,if0)g3 z,yfgdm gyoyt 1 falls freely for 4.0 seconds, and object 2 falls freely for 8.0 seconds. Compared to obje),mg3 eiq fyf3dz i( g70oy,ygct 1, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to a finx*s /hrhw3 w4hwbc5q /al speed of 20.0 m/s in a time of 15.0 s. How far does the car travel during this r35 h bc/q/ wshw*wh4xtime?

  94.03: A ball is thrown off a hi7xuuc/yb e p6*gh cliff with no horizontal velocity. It lands 6.0 s later with a velocity of 40 m/s. What was the initial 6uxbyu/p7e *c velocity of the ball?

  95.27: A rocket near the surface of the earth is acceleratin5 j.2iu8b: h;ui)lax;lb i ndtg vertically upward axiau ;8:i2ubb ;)nldt5hl. j it $10\;m/s^2$. 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/smmjei7z9b0/f0 j aq8j at one instant. If it continues to fa0me/08bzja9m j7 iqfjll, one second later the object would be moving with a downward velocity closest to:

  95.39: A car starts from rest and ap43y g3 -4yhfxl iho168axv(db3 h snoccelerates 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 thergu+7u-rfzq5(a t. s4ssh4 kt top of a building strikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of thert qsf4 hu atz+s.4-kr(5ugs 7 building is approximately:

  97.09: At a certain time, an object in free fall has velocity 4.03sy3(m aj/nhg09pmj g m/s in the upward direction. What is the approximat3 (3jyp9m j/ma0gg nhse velocity of the object one second later?

  98.14: How long must92c;/jd)t 7zk* u 7lapx2 ws(pz:q1fatmg x dg 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 mn me /lo9 7e*svod3e3woving downward at 18 m/s. If it continues to fall, tw l7*9n/dem 3e soo3evwo seconds later the object would be moving with a speed of

  17.02: A small object if2 - t 8jsg;oua3la3hrs released from rest and falls freely for 4.00 s until reaching the ground. What was the height above the ground from which the object s3ot-h a f;lg2au3r8j was released?

  11.06: A ball of mass =0.100 kg is launched straight upward -n,ful;xw81l vkgl l 2sn:9upso 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 magnit9fl 1 2:sknun l,8wvpl l-;uxgude 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 hd a4(f,dilw- /l w,cqis launched straight upward so that it rises to a maximum height of 12.0 m above the launch point. Ignore air resistance. Approximaif/ (lcwqwa ,d-h,4 ldtely how much time does it take the ball to reach the maximum height from its launch?

  98.31: An object sliding down2 *4oh .plbzsc an inclined plane has speed 0.40 m/s two seconds after it begins to slide. Approximately how far does it trhbpco2s4 .lz*avel in three seconds?

  98.40: Coin I is thrown upward from the top of5b 7l5u gtlsq93qs.m2f5cedc a 100-m tower with a speed of 15 m/s. Coin II is dropped (zero initial spesce lq5b57 5l29g3fsctumd. qed) 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 nj w7c9l2xbr )*tlmnqc339p v with twice the initial speed of another, how much higher will it be at itl ) 7qj2lcmx9ncn93*wvr 3ptb s apex?

  02.30: A box falls to the ground from a d1sotgec 8a3r0 elivery truck traveling at 30 m/s. After hitting the road, it slides 45 meters to rest. How long does it take the t0se3 a8cr1og box to come to rest?

  03.29: An object is thrown upwards with a v7t78s1xogl ek62veyy elocity of 30 m/s near the surface of the earth. After two seconds what would be the direction of the displacementsyxg2t ky776vo e8e1l , velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3m) are thrown vertically upwarkett-v :a2f m4xtw0 t,bpha(,d 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 pe,0: taf 4-vhbkmaw,t(tx t2 negligible.

  10.25: Two point objects are launched straight upward with identical linear merf4umkse /d /) ja89comentum. Object 1 has mass M and reaches a maximum height H above the launch point. If object 2 has mascum ej) /ae/f89rsdk4s 2M, what is its maximum attained height above the launch point in terms of H ?

  04.28: A rubber ball bounces op2ck5zc pn7*jn 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, what would be the time between the second aj5 *cpk2pz 7ncnd third bounce?

  16.21: At 1.94 s afth+r 25atthon,2pn: v74n clvmer launch, a projectile in free fall 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 the horizontal?pmr vhn ,n4l+t h5n:c a72t2ov

  05.02: A pebble is droph3/,b kvhg /ovped from a high 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 a//vhvk,o h b3gir resistance.

  06.03: Three students were arguing about the.:tyqct6. dc b 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 how tall is the parking garac.dy6t :bq tc.ge?

  05.07: A snail is moving along 2o+e pwdmn:wz84yc7ga(f7mq a straight line. Its initial 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, initial velocity and acceleration, respec2 z wd7 4awm:onecfq7( +pmy8gtively, are

  04.38: A small point-like object is pulled downwards *0c a*7 uga9mp,mrfumc4l ni 8*vj ei0by 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 o0i,c 7v*m *me0ufia amj8p ug*n lcr49f 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 tall tower. Half a second q7*z : mkexnz(cy j:0qlater another rock, twic7*e z(kz0qn:qm : cyxje as massive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s algn0b r x,85inyong a track. The cart comes to rest 0g x,5nrnib y8after 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 before coming to rest?

  07.11: A cart is initially mov*63pcznphe*e ,nxo.urn 5 fm6 ing 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 mov5ppz ,efc*unr*n66en x3oh.ming at 1 m/s. How far does the cart travel before coming to rest?

  08.03: A dog starts from rest and runs in csk-:m6 mnl)s-td; 89joyfiy a straight line with a constant acceleration of )jdlcys9: 8sof;ykmn- tm6 i-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 f z gkuny.qw0zr1.*dt, b +gu;drom a height h above the ground. If ,uk z0 u+.ggznq1r wyddb*t.;the ball falls 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 um3q6dh6 x6- m8mrg-y0 m ansyr31pil aniformly 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-ar -8mm3 30l6s1qmr xg6p6yn damiyh to that traveled by Object 1?

  12.26: An object is thro-5 smc oigs9n9wn horizontally with speed 10.0 m/s from a height H above the ground. The object reaches the ground with a speed of g5cs9o m9sin-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 in free7trt( 5j8x fyjv ;us+l*zm0*mic u y1i fall until it returns to itju(*m 1ztc078r*siv y fi+5xyljt;u ms initial launch 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 manfas 10ccu /vzgo nbz( x62 tdw6pk/x3.y meters does the object fall during the first 3.00 seconds of fligh2znckbgc 60tp1au6xzx os 3v .f(/ d/wt?

  15.02: A box uniformly slides 7.50 m 3lzil:k;44uvuq u 1tmx d8u*vto rest across a flat surface in a time of 12.0 s. What was the iu zt4lu*k qvux;i m3lud4:18v nitial speed of the box when it started its slide?

  14.07: Starting from rest, a cfi3p v mgzklb0/-p(j8 n:7 lheart uniformly accelerates to a speed of 7.60 m/s in a time of 3ipznj/70v 3m bhlf kpg-(:le8 .00 s. Through what distance does the cart move in this time?

  14.16: A toy car initially moves to the right at 60.0 cm/s. )zlb0v b0zd cr:,bmp4Five 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 thezm4, zbplb)d c0 b0:rv 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 39bw/35rdi wpga exx 8to the right at 60.0 cm/s. Five seconds later, the car is moving at 40.0 cm/s to the le/i grdx3ep3 w5bax8w 9ft. 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 five second motion?

  14.33: An object moves with constant acceleration starting )q 8 anq:sh-pw*jz7qx 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 while in free fall. Which one 7.c(n ;6su1nzq j qf:r(rn xhcof the following choices best represents the direction of the object’s acceleration during itq7n: zxcsh1jf;nr6 (( ucqn.rs flight?

  13.26: An object moving only to todeqtdma7c *ivar /rf-+1s42he 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 constant acceleration must the object havfa +d1oq*ev-ma/ t 2rdi 47rcse during the 8.0 seconds of stage II?

  15.32: An object moving aliv70r/dy9ssl ong a line completes a 20.0 second trip with an average speed of 10.0 m/s in9ry isld/0v7s 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 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 bhmiqegr ;n2hz4 l( +/eq:rt+ 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 droppqr +2/zh(t;:re4q egb nm i+hled. 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 car races with a roblm 4-zwdf5mnu36lev7 ot. The robot accelerate- uned7 3zl65fmmlwv4 s 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 verticallsl /dy bp22w3by 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 is tb2/3bdlwys p2 he object first at a vertical position that is one-half of the maximum height it obtains during its flight?