94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and object bib;+z3 .p +qojqcsb;2 falls freely for 8.0js+pob3 qqi+;czbb;. seconds. Compared to object 1, object 2 falls:

  94.02: A car starts from restbdccq :)hp6b ; and uniformly accelerates to a final speed of 20.0 m/s in a time of 15.0 s. How f;q6c )c:db pbhar does the car travel during this time?

  94.03: A ball is thrown off a high cliff with no swfjgslq5sn16-hzraq md4- 4hu25* e horizontal velocity. It lands 6.0 s later with a velocity of 40 m/s. What was the 4 h qsnjsf- sdulhw-r1 e5 6*5gmaqz24initial velocity of the ball?

  95.27: A rocket near the surface of the earth is acc ul. 1ae/owbm,elerating vertically upward at obu.aeml1 /,w$10\;m/s^2$. 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 o9npcbwf/i(* seau,-at one instant. If it continues to fall, one second later the object would aiu,s* f(/- ceo9 pnbwbe moving with a downward velocity closest to:

  95.39: A car starts from rest ane+( l715ysg bjm +leqzd 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 from thq0rakd.bm5;4rlx 8gy*ii(o n8is+q se top of a building strikes the ground with a speed of 30 4+d o(ix ysmqgk; 8*nirlra5 q0ib.8s m/s. Assume air resistance can be ignored. The height of the building is approximately:

  97.09: At a certain time, an object in free fall has velocity 4.0 m/s in 8cijf ovl0;(zthe upward direction. What is the approximate velocity of theiojvf(c; 8 zl0 object one second later?

  98.14: How long must ew.z*i5l*ulrrwl 0t3; c:5 v5 fxxxb ea $2.5\;m/s^2$ acceleration act to change the velocity of a 2.0 kg object by 3.0 m/s?

  98.15: A freely falling object is foundz4)0c9 rx(tet f;kfk b to be moving downward at 18 m/s. If it continues to fall, two seconds later the object would be moving with a4frtk)tecx9kz b ;0(f speed of

  17.02: A small object is released from yownhx b :,h 0vx4.1qsrest and falls freely for 4.00 s until reaching the ground. What was the height xsxob4 .v h0:wyh1nq,above the ground from which the object was released?

  11.06: A ball of mass =0.100 kg is launched straight upward so that at72h hmw g e3,vge0v,;nyro(it rises to a maximum height ow( 7o2r3 vne0t ;gevgy mha,h,f 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 launcher +zy: yptx/n1h7,8zf0 albg+ir ,bstd straight upward so that it rises to a maximum height of 12.0 m above the launch point. Ignore air resistance. Approrpglrb:z81iy hxn+s/ tft0y7 a,b z,+ximately 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 speed 0.40 m/s two seconds aq j;w8eoq,l5a1)l7 g b0lc wnyg4d ,gvfter it begins to slide. Approximately how far does it travel in thrdvb8c no4jl0l ),, eg;57wq l ygwg1qaee seconds?

  98.40: Coin I is thrown upward gy(auu1ug/ :qfrom the top of a 100-m tower with a speed of 15 m/s. Coin II is dropped (zero initial speed) from the top of the tower 2.0uya uuqg (:/1g 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 +, ,, zae 5otf/9ji.ioqjdn tzinitial speed of another, how much higher+z j.j oi95f/dtainz,tqe, o , will it be at its apex?

  02.30: A box falls to the ground from a delivery truck traveling at 30 m/s. Aftevnw+7j a/3ffo .ft5jwr hitting th 5nt7foff .wa jv/3+wje 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 near the surfy w6;gv:s hl3 u42axfr a(ue;k8t7zv hace of the earth. After t2f ;t;(7vg4lez as86kru3aw vh yxuh:wo seconds what would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different ma pl,+ 6ejw5en58zg g qii0ta:ass (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 high to low the maximum eeit aa njz6l5:,5gpw gi0q8+ height of each stone. Assume air resistance is negligible.

  10.25: Two point objects are launched straight upward with identical linear mor68o l -ss .lzerc5c/ l/(wpdrmentum. 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 launch point in terms of H ?/ wecsodc(l-r s/65r .rlp 8lz

  04.28: A rubber ball bounces on t .m4xf rkr*,-yn7rijt he 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 betweenm x*jk.ry7 n,t i-f4rr the second and third bounce?

  16.21: At 1.94 s after launch, a projectile i yrkiykw ;.1ndh:j f78n free fall achieved its minimum speed during flight. If that minimum speed was 15.0 m/s, w1yhj fw7yidnkr.8 k:; hat was the projectile’s initial angle of launch from the horizontal?

  05.02: A pebble is dropped from a high vertical cliff. pvn dy7pvp25269wq6m uk.y bv The collision of the pebble with the ground below is seen 1.50 seconds after the pebble is drvvby2v w.p6m u6k 25p7nq 9dpyopped. With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students 6b98s mbho56b j-lakfwere 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 balls. If the time for the ball to fall was 1.4 seconds, approximately how tall is the kobh 68afjms5 bb-6l9 parking garage?

  05.07: A snail is moving along a straight line. Its initial position is x0 4hz 1n pi n;na4+u+mgk 17nagn= -5 meters and it is moving away from the origin and slowing down. In this coordinate system, the signs of the initial positiona ;nmi74ag1k 4+p nz1 ung+hnn, initial velocity and acceleration, respectively, are

  04.38: A small point-li9pzv j 4pvl2v;s/9 0hnhff f5oke 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 there is no loss of ener h 9vvf5n9s4o0hzj2fv;/p p lfgy and that it takes negligible time.

  06.13: A rock is dropped from the top of a u zb(31c ldqrz1r;lw,j)*, v s41ot8ly aatvz tall tower. Half a second later another rock, twice as massive as the first, is dropped. Ignoring air rer) ,,8zdyau1z 3raw*vo4jll (tqsz1 c1 vlb; tsistance,

  06.18: A cart is initially moving at 0.5 m/s along a track. The car+ gs;0b .) dt yw9cxakvl3op.f 8-xkiyt comes to rest after traveling 1 m. The experiment is repeated on the same . dlxg8cop w-+ v0;ifyks)kt39baxy.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 moving at 0.5 m/s along a trsxm-4 gnq f wv2skj:m2 4 .rp1y -p.ng6guyj1iack. 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 before m2fyg4w p:1 g x2n-giq6snu-v pj.mj k.4sry1coming to rest?

  08.03: A dog starts from restj 4bukc t5t vml/0h(ncl;/ip3 and runs in a straight line with a constant acceleratioilvmc/ub0p tlk;thcn (345/jn 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 withoutcqq b3rmk)+wg0u cu:8 air resistance from a height h above the ground. If the ball falls the first di0+m3 :8)urc gqwuq ckbstance 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 uninj 7r; wr,lc;qhk kih z4)t58hformly accelerate to the right. At time t=0,;4kiq5hh;t 7 c8jl, krrz)wn hthe 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 Object 1?

  12.26: An object is thrown k 0 mgfaqgme9 jpe1n*/q6k)t)nfc16ghorizontally with speed 10.0 m/s from a height H above the ground. The object reaches the ground with a spee19jpm/q1g 6 gmn*ec0kna)qk6)fge ft d 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; +a(nnzm4n/ nksi6ex . The 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 s+mk nxnzne6 ;an/i4(a function of time during its flight?

  14.03: An object is dropped into free fall. Through x q)(z5gtk,xrhow many meters does the object fall during the first 3.00 seconds of f5)xt(r,k qgzxlight?

  15.02: A box uniformly slide,aoy.pf nyn.2) o eq .k*rew:grs+ lu+s 7.50 m to rest across a flat surface in a time of rko2eg w*.alrq)+ne,u:.y+ yfsp n.o12.0 s. What was the initial speed of the box when it started its slide?

  14.07: Starting from rest, ujw )x zx/y83ffjlws5.x m )8ba cart uniformly accelerates to a speed of 7.60 m/s in a time of 3.00 s. Through what dist) 8f j)wf3 8j zlxy.wxxu/5sbmance does the cart move in this time?

  14.16: A toy car initially moves to the right at 60.0 cm/s ow* (,hc(9 r:ltjgq i19by4judw5hbe . Five seconds later, the car is moving at 40.0 cm/s to the left. The total displacemen:b5 (1oculjir ,4hedjb9 tq*(9whygw t 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 nf57z)irq+ ke vx10pdto 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 zvq51 k0rnx+7ep fd)i 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 withdo+ewm 9y ;eog;e 9za; 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 initia3l k +saq56ourwdl*6rlly is moving upward while in free fall. Which one of the following choices best represents the direction of 6rld ol* 5kr6w3qus+athe object’s acceleration during its flight?

  13.26: An object moving only to the right completes a 20.0 second tkx8a2fzh/i z: rip in two stages, I and khz/zf 8 i2xa: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 have during the 8.0 seconds of stage II?

  15.32: An object moving along a line completes a 20.0 seco6mw(+ p pgpc,and 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 directed to the left must the op a+p wg,mc6p(bject have during the 8.0 seconds of stage 2?

  13.33: At the top of a high cliff, a small rock is dropped from rest. A b)4g y1ggr3cww *m+j -gk ddt-gall is launched straight downward with an initial speed of 36 m/s at a time 2.10 s +m*4 c t- gywdd)g1g wrk-j3ggafter 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 car races with a robot. The red 1d h0)vmvti7r7a)+xs li 1tobot acceleratesi17 t hvs0el1 td ivm7dr+ax)) 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 vertically upward. ne3:l;e63* hhj)cjugj*gku 3 mx/n1sm r,ca o 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 the object first at a vertical position that is one-half of the maximum height it obtains during its flight1ohacsec h)/3 ,j3 *g *ngn3m:6jxrj; uml uek?