94.01: Starting from rest, object 1 falls freely for 4.0 seconds,8. uhouo5v(m2p/ qrdn and object 2 falls freely for 8.0 seconds. Compared to qn5mruudov8( hpo/ .2 object 1, object 2 falls:

  94.02: A car starts from rest andvz ;w*s w)wk9l n18tzt uniformly accelerates to a final speed of 20.0 m/s in a time of 15.0 s. How far does the car travel during this time? 8wk1vn*; w9ttlzzw )s

  94.03: A ball is thrown off a high cliff with no horizontal velocity. It16mvmgiam:wp6pl b5 , lands 6.0 s later withmm:plb v1m, 56w i6gap a velocity of 40 m/s. What was the initial velocity of the ball?

  95.27: A rocket near the surface of the earth x2dn q5nh2cn5bi tb/,+s wk .jis accelerating vertically upward attbc,.qhj2in2/ns n5b5 +kx wd $10\;m/s^2$. The rocket releases an instrument package. Immediately after release the acceleration of the instrument package is:

  95.13: A freely falling 0 rri: qcb87*nx 3xqhvc5fz 8xj9qo)zbody is found to be 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 c 0b:znx qqh7jq*3cr 8ocfzx )i8xv95rlosest to:

  95.39: A car starts from restk3rraym)0+ j9bj,n9sg0tmp q 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 from the top of a building strik6g+ipx s 0 t0f8 lxf8niyv6eb(es the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of the building is approximat 0i0vipyfsx8n (xl6 ef8g6t+ bely:

  97.09: At a certain time, an object in free fall has veloch/0hq3c up 7;tudzbpgf1c6e 7 ity 4.0 m/s in the upward direction. What is the approximate velocity of thegepu0; tcdp/7uc qfb1hh67 3 z object one second later?

  98.14: How long must a8t* b 4rkq:zm)l a4jam $2.5\;m/s^2$ 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 :oe o, uh9 faxa9q (v3fdl/4+oln6yyk 18 m/s. If it continues to fall, two e +yvlaq9(faofokyu 4,93o6n :xd/ lhseconds later the object would be moving with a speed of

  17.02: A small object is wvm 7c2hvr-/0h mqg / br*rt9xreleased from rest and falls freely for 4.00 s until reaching the ground. Whvchr/ /vh-0gbw 29xmt rm7* rqat was the height above the ground from which the object was released?

  11.06: A ball of mass =0.100 kg n;6 +i4s5 m ykiepzoe9is launched straight upward so 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 thn9;sip+e6ek45mz i yo e 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 lau d9fyfh(;mh l2b2/qvenched straight upward so that it rises to a maximum height of 12.0 m above the l9y; dbfq lmeh2f/h(2vaunch 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 speed 0.4x*/ctx .t 1yk w)o)rps0 m/s two seconds after it begins to slide. Approximately how far does it travel xr /po)w1*s x.ktyc)tin three seconds?

  98.40: Coin I is thrown upward from the top of a 100-lc a nua/rx 983.kbv1hm tower with a speed of 15 m/s. Coin II is droppe8a.lkxub9 / h n1rca3vd (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 initial speed of1dxd25 ew.sw nz ,2:7m;jm9tdnjkl r g another, how much higher will it be at its ;slj9:wrd kg.x2wt, z em n1275dndmjapex?

  02.30: A box falls to t1olef -6s p/tjhe ground from a delivery truck traveling at 30 m/s. After hitting the road, it sl1j lo6pfs/et -ides 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 s2z1- 9fyiwtm )mh+nn:uv, a-ybv:xw e urface of the earth. Afterna)vx2b 1n,fem::th9 u wmy-y- wz+vi two seconds what would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different ma.e8z)r g1 tehqf2:yv5,g.bt / woskfu ss (1m, 2m& 3m) are thrown vertically upward with different .: f fe5gwzyoeh brtg)kt82uq/.1,s v 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 negligible.

  10.25: Two point objects are launched straight upward with identical linea:pig5mle8e ) h)(;4qismx lvor momentum. Object 1 has mass M and reaches a maximum height H above the launp g viis8)4lx (hmee):5 ;qolmch 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 bounce, the bagte izo 60)sy djr83p:ll 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 se g6z0p3dt8iry :eo j)scond and third bounce?

  16.21: At 1.94 s after launch,;+f ,h3 anup3agtff1k a projectile in free fall achieved its minimum speed during flight. If that minimum speed was 15.0 m/s, what w phuf ff;33 +,ta1ngkaas the projectile’s initial angle of launch from the horizontal?

  05.02: A pebble is dropped yy1acn5 z+j k fqu-2lafg4:7 pfrom 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? 14 l+:f2n qj7cy-5upaagz yfkIgnore air resistance.

  06.03: Three students were arguing about the height of a park 55gmc p5t4f11+n-obi pdpisz93z btxing garage. One student suggested that to determine the height of the garage, they simply had to drop tennis balls frozmn3tp95zoib st14x 5pc-p+51 gf dbim 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 garage?

  05.07: A snail is moving along a straight line. Its initial position is xeqwd6x a .( bsu8,0z; kcfca/u0 = -5 meters and it is moving away from the origin and slowing down. In this coordinate system, the signs of the initial posi(u;0ek.cc/xu,fsaw8 z6 qdabtion, initial velocity and acceleration, respectively, are

  04.38: A small point-like object is bgf87(wn hzqa e.o4(xpulled downwards by gravity (down the plane of the e4(whfx7 g.nzb oa q8(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 energy and that it takes negligible time.

  06.13: A rock is dropped from the top of a tall tower. Half a second later a w;jueytsj0 czpw ,g)dmt4.c;, k54eq nother rock, twice as massive as the first, is dropped.;tydmq. j5k,cj0)gct4esuz w; epw ,4 Ignoring air resistance,

  06.18: A cart is initially mor8gf)gf, (ep aving 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 inifgfg )p 8a(re,tially 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 ta/q ru*v9 i xy0.vo8htrack. The cart comes to rest ia0 ou/*t r9vyv.8hxq 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 coming to rest?

  08.03: A dog starts from rest and runs in a straight line with a const-+1l12jz 1zquh jzrexav 9nx:z tr:a; ant accelera utz h1qnz1;jr-za2 a :xv+r:9l xjze1tion 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 aixkf.sm2 z0ueesv:w43 r resistance from a height h above the ground. If the ball falls the first distance 0.5h in a timx :m04f u 2zskve3wes.e t, how much time is required to fall the remaining distance of 0.5h?

  10.38: Two objects both move and uniformly accelerat cd hqvy9em5 yjz oi(,(-5zx.ke 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 obz(ydz .qi yke5 ch-mxvo59,j (jects 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 *k y d)turlwi--q2kjz7cl u:6with 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 representsquiju:-z7r 6 lyk*2c) -lwtdk the time of the object’s flight to the ground? Ignore air resistance.

  13.10: An object is thrown straight upward. The obj4ioxz,g: j9j 3ge 9fvgect remains in free fall until it returns to its initial launch point. W ,9 gjf4:ozxvj9i g3eghich 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 drorwoo n b71 f2e81poef/pped into free fall. Through how many meters does the objecp o7/2 1frenb8o1oewft fall during the first 3.00 seconds of flight?

  15.02: A box uniformly slides 7zj5d 7-uzvcwf*ab(m 4: nmkwb;xi( 1t.50 m to rest across a flat surface in a time of 12.0 (w;b d btf(ci nu-k4jz1m: x5w7mza*vs. What was the initial speed of the box when it started its slide?

  14.07: Starting from rest, a cart uniformly accelerates to a speed of 7.60 m/sg* cyf +6(i3pgrbl2ow (e3q gs in a f oq*63gclrw bg 32gse((y+iptime of 3.00 s. Through what distance does the cart move in this time?

  14.16: A toy car initiallyq7fz1zg 85jaqic)lx 3,yj/p h moves 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 followin ,hqzx38)fj 7y ipz5/ qja1lgcg 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 at 60.0 ckm:o3 5 kjfem+*- t.lh lrtfx.m/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 leff:-tt3le 5.mm. rjklkf xho+*t 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 2 *5ba2d ugbleconstant acceleration starting 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 movoq.yr fye o/ mqj5f4jos*4 9t8ing upward while in free fall. Which one of the following choices best represq/ryftyqm osf8 e 4j9 5oj4.*oents the direction of the object’s acceleration during its flight?

  13.26: An object moving only to the right completes aip.gxu aoj: :q9 1hh(zhwl, +h 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 have during the 8.0 s9 h :haljh+q iw zh1xog:u.,p(econds of stage II?

  15.32: An object moving alooti2 xk/q*pb8 ng a line 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 acceleration directed to the left must the object have during the 8.02pi8 bq*k/ot x seconds of stage 2?

  13.33: At the top of a high cliff, a small r+2pl ,5utm z1d,a0od. d ksgtqock 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 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 g t ao,t d k0d.sm+,215lpuqdzrock?

  16.36: On a straight road, a sesbze*iy.. g;dlf-driving car races with a robot. The robot acceldiyeg .. sb;*zerates 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. q vqx/02 zzjuh0u+r:i 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 positiqjz 0 :huui zr0+q2vx/on that is one-half of the maximum height it obtains during its flight?