94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and 2f,:o(n-c dthwj1+ue y g3 tacobject 2 falls freely for 8.0 o wt c12jdte+fcyu,ha 3 (:gn-seconds. Compared to object 1, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to a final3 c gzy6ebfc65 speed of 20.0 m/s in a time o6y536ezfgc bc f 15.0 s. How far does the car travel during this time?

  94.03: A ball is thrown off a hi k5 f42ljy7i.re6gy8alukj1t gh cliff with no horizontal velocity. It lands 6.0 s later w.lj6yf 2u7li4 k 5tgj1ryake 8ith 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 up4*hlp: qekx fv x)40epward l:qx*hpf40k e )x4vpeat $10\;m/s^2$. 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 at on-fsmq)a 1y8 xze instant. If it continues to fall, oney)mfs x8 zq1-a second later the object would be moving with a downward velocity closest to:

  95.39: A car starts from rest and accelerak6b7 ugh: 0:yr(jvf mmtes 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 oci2k; zpri8nna027oground with a speed of 30 m/s. Assume air resistance can be ignored. The height of the building is appr i2 ;i pon0anzkr872cooximately:

  97.09: At a certain time, an object in93l dbq), e;rqwj .esw free fall has velocity 4.0 m/s in the upward direction. What is the approxima; l,e3bswqq.j wr)e9dte velocity of the object one second later?

  98.14: How long must a ;9eaiqm 7udk1 $2.5\;m/s^2$ 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 movinn77i)bnsx/yfd+4k 2a pquf7 lp1vp , zg downward at 18 m/s. If it continues t4xnl/d7i+q) zf 1f2 pa,uk7 psvy7bn po fall, two seconds later the object would be moving with a speed of

  17.02: A small object is released from rest a i0(8jviu . .3sl+lbvp pgnm1fnd falls freely for 4.00 s until reaching the ground. What was the height above the ground from which the object was03jlbf1gl.ppi u+ vn .i(mv8s released?

  11.06: A ball of mass =0.100 kg is launched straight.+ulbedx6zs r rb 8o25 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 heig+uz r l.8x2sob5debr6ht, 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 straktu14bmuc*4cgtf,9 )knky ,o, y8 ugright 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 btku4g9buc ,ym8kgko1y4 t,f* r)u,ncall to reach the maximum height from its launch?

  98.31: An object sliding down an inclined planbv psg 7j+;b :)s)tikce has speed 0.40 m/s two seconds after it begins to slide. Approximately bts):b7p;v)ij+ g kschow far does it travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m tower with a 1 g.+rkipwfp2speed of 15 m/s. Coin II is dropped (zero initial speed) from the top of the tower g. pkip2+1frw2.0 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 t erghl31pyw91 wice the initial speed of another, how much higher will it be 1y 3 1r9pelhwgat its apex?

  02.30: A box falls to the ground from a delivery truck travelinqrye 9bl60v( ik rcw61g at 30 m/s. After hitting the road, it slides 45 meters trei yqk6960lv1rc b(w o 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 surfg(9rae ptdakk6 pg* 14ace of the earth. After two seconds what would be the direction of the displacement, velocity and acceltpdre6a91*kpgg ak ( 4eration?
displacement velocity acceleration

  04.10: Three stones of differv- +5;ldddfqu5e t ,aient mass (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 height of each stone. Assume air resistance is negligiblquiet -;d+5f v5ldad ,e.

  10.25: Two point objects are launched straight upwmmlg8 vamw22d7x8.u /f.bpq r ard with identical linear momentum. Object 1 has mass M and reaches a maximum height H above the launch point. If mwfv8822m gu/.x.r m7adpl bq 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 eacioiiahqtp i3s r5r0bxfwc )1rf-. 1 5-h 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 timo-1a 1h 5fritrb0x. wiq s ipfc-)ri53e between the second and third bounce?

  16.21: At 1.94 s after launch, a projectile in free fall achieved its ztb v qv5ajmq+; idk(f40(av, minimum speed during flight. If that minimum speed was 15.0 m/s, what was the projectile’s initial angle t;5qk(qajvmv4 b+z0fi(v da, of launch from the horizontal?

  05.02: A pebble is dropped from a high vertical cliff. The collision of thbh6,a 8wiffr8t 2ldf15onkd / e pebble with the ground below is seen 1.50 seconds after the pebble isk b2,8tw/iaf1dhffrd65n l 8o dropped. With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were alk3w9o;h p jywi hvo 9nb6q07s cj+x9*rguing 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 yk b 93o;*wxch j qils7p 9wn6oh+v09jwas 1.4 seconds, approximately how tall is the parking garage?

  05.07: A snail is moving along a straight lin uyg;+7c llpv-e. 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 init ;yplcl+ug-v7ial position, initial velocity and acceleration, respectively, are

  04.38: A small point-like obj:u qm(/ wux+ v9uc/habect 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 energy anh/u vmc(a9bqx:uwu +/d that it takes negligible time.

  06.13: A rock is dropped from the top of a tall tower. Hal dz i 5f1biun*yu8*8ecf a second later another rock, twice as massive as the first, is dropped. Ignoring air resistanc n5f*d8i8bzyuuce*1 ie,

  06.18: A cart is initially moving at 0.5 m/s along a track. The c6t/5 lg.p785 r 8 zeqawegvgacart comes to rest after traveling 1 m. Th7ac/ vplr5wae.g8 t85z6egqge 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 moving at 0.5 m/s along a track. The cart comes to rcxg os2h-q ho 1, lg+i yf70jz.-oqhh/est after traveling 1 m. The experiment is repeated on the same tracsh ghoy oq,g/h1 if.q 0olj-+-2zcxh7k, 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 e dc jrbk * o7z2tvv)-gzg9*q45u9n0r 0yl mnwa straight line with a constant acceleratiok wov2r-9 4 )z0n 9y7t*qbzjdn5cr0gev*mu lgn 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 a2iasv 7a9k 5mot rest falls without air resistance from 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 0.5o skma 2av97i5h?

  10.38: Two objects both move and uniformly accelerate to t7xjwrmb 9u(7sz d)zg.he 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 Objecgu7w(d) 7sb.r9 zxz jmt 2 to that traveled by Object 1?

  12.26: An object is thrown horizo ;w s/k )m67l;vhbzog0k2,sag vzf(gjntally with 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. Whigk (kz;/)mjl ;fs2v6szw,bgvg0 ha7och 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. Thev fh3ntr-f/;bjn8 by( 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 a function ob/bjvtf(-h ;3n nfr8 yf time during its flight?

  14.03: An object is dropped into free fall. Through how many meters4r*dnmq c eq13 does the object fall during the first 3.00 secm q*e1cdnq34ronds of flight?

  15.02: A box uniformly z 2 4e i.qrlzf*hgv2a5slides 7.50 m to rest across a flat surface in a time of 12.0 s. What wasq2f4a25gzr vhl.e * iz the initial speed of the box when it started its slide?

  14.07: Starting from rest, a carz0 uogoq le/35t uniformly accelerates to a speed of 7.60 m/s in a time of 3.00 gu5oz30l/ oeqs. Through what distance does the cart move in this time?

  14.16: A toy car initially moves to the ri.gq gp l-8tk-mkv:rfx 5rz 69zysc:+gght 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- 8t5x.lrg+p srgzmv6 :qzk9k:ygcf- 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 initil8 ka cln+,ur2ally 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 lr8lak2n u,+cof 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 .2cha; mz l:p2f:n 7g+wnu catconstant 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 isa k83de(p ,qqs moving upward while in free fall. Which one of the following choices best represents the direction of the object’s acceleration durindea, (s 8k3qpqg its flight?

  13.26: An object moving onlym9lz3wg0 k9b cfax-j + 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 stage0cmka9x-lj + zfwb3g9 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 movi: rj;5 .,moobwfx; ikeng along 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 co;:bi,jw o5.f me;koxrnstant 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 rock is dropped from :p9n i ua48awyrest. 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 th8ai yw4n p9:uae 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 n1xjfn)pj r5 ;with a robot. The robot accel;pn 1 njrj5x)ferates 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. The vertical position of h;l/l )aei.i ythe 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 f/ie;.ay l lh)iirst at a vertical position that is one-half of the maximum height it obtains during its flight?