94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and objectbzq6ja ac 93g8hrd/9h+ 7enix 2 falls freely for 8.0 seconds. Comphia9deg3j zr 9c+76b8hqx n/aared to object 1, object 2 falls:

  94.02: A car starts from rest sna *):2q0bi8no vnkyand uniformly accelerates to a final speed of 20.0 m/s in a time of 15.0 s. How far do n):nk0yqba*82ions ves the car travel during this time?

  94.03: A ball is thrown off a high cliff wii+4 wmv0k/r ydbs2e6 *0 xbkqpth no horizontal velocity. It lands 6.0 s later with a velocity of 40 m/s. What was the initial velocity of tk r/kdym0*2s6vb+pb xwi4 0qehe ball?

  95.27: A rocket near the surface oxouz 9mujni+ v 3.a 9m4mjn3y8f the earth is accelerating vertically upward at .+uiv mm8 aozm yxu4 jn9393jn$10\;m/s^2$. 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 one ic qnmp k; n7h(v(xy:,pnstant. If it continues to fall, one second lateyp( 7(v, xqp;: nhcmknr the object would be moving with a downward velocity closest to:

  95.39: A car starts from h8.:1nz 7p fcuc hbsn.rest 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 bu ye,0av76hicwunm4 z:ilding strikes the ground with a speed ofv uia ch0 w76z:,4ynme 30 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 h3 5tc xdy,mcg go;6ol*as velocity 4.0 m/s in the upward direction. What is the approximate velocity of the object one secooggo cy6,mc3td 5*x l;nd later?

  98.14: How long must lha53g) m)gk-d pr :nw:ic7m ra $2.5\;m/s^2$ 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 bey)d) zonj/c .n moving downward at 18 m/s. If it continues to fall, two seconds later the object d )z.o/c)jnnywould be moving with a speed of

  17.02: A small object 12zwn xi h87uiek;2ut is released from rest and falls freely for 4.00 s until reaching the ground. What w2euik8h17 u2 xtiz wn;as the height above the ground from which the object was released?

  11.06: A ball of mass =0.100 kg is launched straight b0 aw0ld8 px6q4fjo:v 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 chob o 0lp :0waqj8dvf4x6ices 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 straight uv*yr0r4 nub zarsw . 5*9n(a*-mrtatvpward so that it rises to a maximum height of 12.0 m above r at**y-.zavr*an0 (rru5 t m4n9vbs wthe launch 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 has2fv v4dhi 9,ke.: *fvdb9vlqu speed 0.40 m/s two seconds aftb d:f,l29hv.u9ei fqvkvv4d * er it begins to slide. Approximately how far does it travel in three seconds?

  98.40: Coin I is thrown upward from the t gj1*6lto los)op of a 100-m tower with a speed of 15 m/s. Coin II is dropped (zero initial speed) f1jo 6 st)lo*glrom 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 wit k+(b) x sgeeivn)j-r:v; l4tih twice the initial speed of another, how much higbv;+ n( je)e)ilk4x vr -s:tigher will it be at its apex?

  02.30: A box falls to the ground from a delivx ji611ijvkx i).j8vxery truck traveling at 30 m/s. After hitting the rox)8v ixjx 1vi6.k ji1jad, 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+cv p 9e6htdp. of 30 m/s near the surface of the earth. After two seconds what would be the direction opct+. eh6pv d9f the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3m) are thrown 5 mo*rgkt2 m;yvertically 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 ne;*mygm r5t ko2gligible.

  10.25: Two point objects are lau -ol5- ie:ljcyn2nnw7nched straight upward with identical linear momentum. 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 thi-52ownl n7jl ne:c- ye launch point in terms of H ?

  04.28: A rubber ball bounces on the ground aqw2i v1gcv73x s shown. After each bounce, the ball reaches one-half the height of the bounce before it. If the time thqw g3cv12ix7v e 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 pro.6q7ca4vv gy pjectile 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 f746 yavvgp.qcrom the horizontal?

  05.02: A pebble is dropped from a high vertical cliff. The collision of the pevu fd,2v3kcj -yz1c0 dbble with the ground below is seen 1.50 seconds after the pebble is dropped. With what speed did the pebble hit the ground? zc-0 juv,y 1dkv3 2cdfIgnore air resistance.

  06.03: Three students were arguing about the height of a parkinc p.zo6 )rx9hug 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 s.6uhroc 9 )pzxeconds, approximately how tall is the parking garage?

  05.07: A snail is moving along a straight line. Its initial position wl/c qpnz8/r7 is x0 = -5 meters and it is moving away from the origin and slowing do/r 7ln/pc8wqz wn. 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 by gravity (down y3 0opsxt42-5 ctkncn the plane of the3 cp5sx0 kcot42ny -tn 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 skm9:).+fwp vukd v*toecond later another rock, twice as vu*f)o.t kp d 9:kvm+wmassive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s along a trackdtsdv;u1 kx zb0o )wzk- a flu*.f1c)1. The cart comes to rest after traveling 1 m. The experiment is repeated on the same track, but now the cart is initially movinz1wo0k vd.fs1cb1 z*d -u)t;a)xk u flg 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 oet)s u.le).bivbt 4 o63q pk(e5nc (aalong 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 moving at 1 m/s. How far does the cart trave)bunetboeqti.c(s 6o v akl5 .(e)34pl before coming to rest?

  08.03: A dog starts faf(u4nvk6qj i)zhc45rom rest and runs in a straight line with a constant accelerationq 5junkf4vc)ha z6 i(4 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 ;kl5p1 iyrl4wryxy r41m. j,qrest 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 distaniyq4lr4.y w5r r,; 1kl1xmjp yce of 0.5h?

  10.38: Two objects both move and uniformly accelerate to the right. At time8s+ /koa gha-w 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 taw+h/s -ga8o khe 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 speed 10.0 m/t8-mj)piasw22 anr2a6zio-i*u,w s rs 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 choi-2im)8w a oj2ari rt2auz,p s6*wni-sces best represents the time of the object’s flight to the ground? Ignore air resistance.

  13.10: An object is throc c da*ct*hpuyh 2a*)6wn straight upward. The object remains in free fall until it returns to its initial launch point. Which one of the following graphs could represent the c caph*62c)auy*t *d hvelocity of the object as a function of time during its flight?

  14.03: An object is dropped into free fall. Througvp 6((nk-: o3 3xvntg2ms jtfyh how many meters does the object v:tkm6( (n- x2n3 stf3pgvjy ofall during the first 3.00 seconds of flight?

  15.02: A box uniformly slides 7.5au1gl6o mpl:*0 m to rest across a flat surface in a time of 12.0 s. What was the initial speed aml 1p:*u6gol of the box when it started its slide?

  14.07: Starting from rest, a *hau3+h/2olu 2ll tufcart uniformly accelerates to a speed of 7.60 m/s in a time of 3.00 s. Through tu ofa ul2lu/l*h 3+2hwhat distance does the cart move in this time?

  14.16: A toy car initially moves to the right at 60.0 cm/s. Five sec u p.a:xo,5c4hu t:oq4 j-7vcqarjul8vqfb0+onds 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 following choices best represents the magnitude of the average velocity of r0v4:a8ohax qjtf-ulu u5 o+ 4. jpv:7,qcbcq the car during the five second motion?

  14.17: A toy car initially moves totvv3ne(r pp;2 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 following choices best represents the magnitude of the average acceleration 32v; ( erpptnvof the car during the five second motion?

  14.33: An object moves with constant acceleration starting with veloc. cpmg(- *u4nbrgn o0kity $v_0 = 5.00\;m/s$ 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 qtf/ 2 ximg3-sisj)1n upward while in free fall. Which one of the following chogqn-istm)s fj2x 1/3iices best represents the direction of the object’s acceleration during its flight?

  13.26: An object moving ona x/ta1iq8wa6 ly to the right completes a 20.0 second trip in two stages, I and II. The averagea6/w8aa1x tqi 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 a7 1;;,dponf 30mhewschqa ex3 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 magnitud1sho30m3e7ehx f dncq,wp;; ae 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 dropp 0;.v dtls6q y;6nkldned 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 furd6qdk t .s;6ln;0nv lyther than the initially dropped rock, what is the speed of the ball relative to the rock?

  16.36: On a straight road, a self- 63wv 14pa-2oocarz rldriving car races with a robot. The robot accelerao r6roa2pl4w z3v -1cates 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 positionw61on):pwsh o 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 duso wo)wp n:h16ring its flight?