94.01: Starting from rest, object 1 falls freely for 4.0 seconds,79qx gvqkic(1 and object 2 falls freely for 8.0 seconds. Compared to obi1q7k(gvx9q cject 1, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates alpq. yo l/ xomm-d7tqz,gd1z , q::a0to a final speed of 20.0 m/s in a time of 15.0 s. How far does the car travel7ldqz, 0 o1ap.t,xa- mgomqlydz: q/ : during this time?

  94.03: A ball is thrown off a high iqhfi.9 wp1e .v 8wh-ecliff with no horizontal velocity. It lands 6.0 s later ih8 -iv qp1.wew.e9 hfwith a velocity of 40 m/s. What was the initial velocity of the ball?

  95.27: A rocket near the surface of the earth is accelerating vertically upbn/s wkjdjfco316 k- .ward at fj6bs1 kdwj o-3/.k nc$10\;m/s^2$. 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/wv g*m-08 jknrs at one instant. If it continues to fall, one second laterrk*n mgj0-8v w the object would be moving with a downward velocity closest to:

  95.39: A car starts from rest and accelerate4-va st7nqlau0s dikul ;m rm4d9x0y4f25k a *s 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 thetqq 4d s5c1i0i. ,xbny95 :fx sgqtu:z ground with a speed of 30 m/s. z y:t1citq: nuf4sxs9 i,g5qd bq5.0xAssume air resistance can be ignored. The height of the building is approximately:

  97.09: At a certain time, an object in free fall ha)dkl k1s o2f-ws velocity 4.0 m/s in the upward direction. What is the asf)lw -21kkdo pproximate velocity of the object one second later?

  98.14: How long must a (2c1/makccepg -c,n qy7)6srd/pw um $2.5\;m/s^2$ 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/z7 .mzj yygo;6q5axg. s. If it continues to fal.jy;6zxqz5yo 7ma gg. l, two seconds later the object would be moving with a speed of

  17.02: A small object is released from restiu4 pmc z(ok1 8 75l9qnxjy 0emllx(5y and falls freely for 4.00 s until reaching the ground. What was the height(05 1(mloml4i5nxpjc uxqkylze8 97y above the ground from which the object was released?

  11.06: A ball of mass =0.100 kg is launched straight upward so,j o 8+wph g(az,bsnp4 that it rises to a maximum height of 12.0 m above the launch point. Ignore air r,z(8s,bp4g haow+nj p esistance. 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 strkhikllc 6-gxrb/; ;y2 aight upward 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 maximum height fro-lc2xh;k/ k gbl;6riym its launch?

  98.31: An object sliding down an inclined pla: p*0 pet- hgjl(3gjply9n s+hne has speed 0.40 m/s two seconds after it begins to s +p 9hj03gtnl e(pl-*sp jhgy:lide. Approximately how far does it travel in three seconds?

  98.40: Coin I is thrown upward from the top o3(kcp/irfdy): bje r;f a 100-m tower with a speed of 15 m/s. Coj(fr3bi rd:p/;k cye)in 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 thrown directly upwards with twice the initialbeiv3 eg28ep7 kp m 0 w)omtixe(7fk5, speed of another, how much h7 o)3wepfi,8k0ve gieextm b 275mkp( igher will it be at its apex?

  02.30: A box falls to the ground from a delivery truck traveling at 30 m/h qvv zmnzvpwrp+0 0)*8 7xm,hs. After hitting thrxh+00 w*zvqn 7mmz, 8vv)pphe road, it slides 45 meters to rest. 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 v;gsr-enf0 7onear the surface of the earth. After two seconds what would be ths0f-g; 7roenve direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3m) are t-.epzxe-s8uy lln f/ ) u3ay*khrown vertically upward with different velocities (1v, 2v& 3v respectively). The diagram indicates the mass and velocity of each stone.*pa 3lnfe) u yzyxu-.s-/k8 el Rank from high to low the maximum height of each stone. Assume air resistance is negligible.

  10.25: Two point objects are launched straighb-vilr84 f c/dt upward with identical linear momentum. Object 1 has mass M and reaches a maximum height rfb/civ 4 dl8-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 bou ,pi9.qd* ka,l6,0pw(uiz jwhx9ahko nce, the ball reaches one-half the height of the bounce before it0jh 9dip9 *iphq(ukwz, 6a,a k ,.oxlw. 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 and third bounce?

  16.21: At 1.94 s after launch, a projectile in free fall achievft:4zcrru0 ocg+sq j3 c22;h red its minimum speed during flight. If that minimum s+2qc2zr :csh4c3r jgf r;0utopeed 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 vertica43hhwj : k2htil cliff. The collision of the pebble with thehthhw34: j k2i ground below is seen 1.50 seconds after the pebble is dropped. With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students cn:3 x8czkb4:7g.)gb9ywgkmn pfz-g were arguing 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 ball.4cwbk 7k gmgf )9nzg3c-z p:xyg8bn:s. 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 in g 4m(vv,l.mwikhe7(j itial position is x0 = -5 meters 47 v jikm.wh,(v(geml 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, respectively, are

  04.38: A small point-like object is pulled downwards yb3z ht2wwxk 1b1c gq3-j.fv1by gravity (down the plane of the page).hfcyk2-b wv1x1z133 gw jbqt 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 there is no loss of energy and that it takes negligible time.

  06.13: A rock is dropped from the top ofiig e ;j :+tbqxhr-g,f80 eh;-if iqr+ a tall tower. Half a second later another rock,-;i xgrb :ir0qghe j thei ;q-fi++f8, twice as massive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s along a tra39;pwms.od e1ff8nx ock. The cart comes to rest after traveling 1 m. The experiment is repeated on the same tos8nwod fp; e1m.f9x3 rack, 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 a track. r-2g4 d6cfj+yhuwlc . The cart comes to rest after travjl+-6c. cy4 huw2gf dreling 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?

  08.03: A dog starts from rest and runs in ysdyfjfz70, sw067 aeo v;5aja straight line with a constant acceleration of wajf0;svjo y as7 0ezd,fy5762$.5\;m/s^2$. 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(1clx1 g kr9rg from a height h above the grog(kr9 1l1r xcgund. If the ball falls the first distance 0.5h in a time t, how much time is required to fall the remaining distance of 0.5h?

  10.38: Two objects bli0 y)ome h0n ,w: k*xzsgg0fm.al 2,loth move and uniformly accelerate to the right. At time t=0,the objects are at the same initial posilo. mxngz),wmhisl0f ka 0y:l0 ,g2e*tion. 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 Object 1?

  12.26: An object is thrown horizontally with 39/09f-cmy,nv udzm h v :pq9hcc,dni speed 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 :hqym df99 ,3/n,m09c nhcuivvdczp-flight to the ground? Ignore air resistance.

  13.10: An object is thrown straight upward. The object remains in free fall un 7smqy vqnm;06p*ppm6d4gao2til it returns to its initiaq mmmq;v6p 02pagn pd6yos7*4l 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 intovmf6a bcn6w8 r5m( (cy free fall. Through how many meters does the objectv5rbf(86anmy mw6 (c c fall during the first 3.00 seconds of flight?

  15.02: A box uniformly slides 7.50 m to rest across ac.o .:ua oirm( flat surface in a time of 12.0 s. What was the initial speed of the box when it s(.a:i. mouoc rtarted its slide?

  14.07: Starting from rest, a cart uniformly accelerates to a speed of 7qm) o:n03m.f/8 hgjh ujlc hh6.60 m/s in a time of 3.00 s. Through whao/h: uchlqjnhm j083g h.f 6m)t distance does the cart move in this time?

  14.16: A toy car initially moves to the right at 60.0 cm/s. Five 4f05ssdanz37yvfqr1 )+ynl 8b,atjx 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 follynny8tabjrs5 f3 ,+z 4qlx as 0v)17fdowing 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 a(o5( zn fsmf* g11 oq*jcs2mdjt 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. Whiz *o5d* gqmsf 1c(j12(jfnsomch 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 with velocijtn,tp vi)cxo-7,4 lyty $v_0 = 5.00\;m/s$ 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 freeu g zz)kf;5 hc5wi4d8e fall. Which one of the fol8kghied); 5f4u wcz5zlowing choices best represents the direction of the object’s acceleration during its flight?

  13.26: An object movilk 4 t+s5 :kdr7k0wcwzr) 1zgong only to 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 consta wrr4o zk)+ :c1 7sdkl0kgtwz5nt 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 v(ni6 g;vulc/h.dt ;asecond 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 acceleration direct/d;6vh; au(.ctgl ivned 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 droppeefj1. o4-i2au y yhv8dd 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 fallenhj8o1.a iyv uyde4f-2 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 withgv6oi sk: r2bc.h :un; a robot. The robot accele;6h2:.gnsvkoui: rcbrates 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 launo7tyn6fmhd 7tfr5 2 lr62h-s :gr0c rfched 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 rfhodr7 2 nr067ly2mc5tr:ffhtr s -6gelease. At what time is the object first at a vertical position that is one-half of the maximum height it obtains during its flight?