94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and :xiowakrlj 8) 3c;5 yxobject 2 falls freely for 8.0 seconds. Compared to object 1, object 2:ix; 8)aw5l rok3 cyxj falls:

  94.02: A car starts from rest and uniformly accelerates to a final speed of 2 dh+.w:ulgn/ wf+-aw c0.0 m/s in a time of 15.0 s. How far does the car travel during this time?w-uaw++n f. :g/ cwlhd

  94.03: A ball is thrown off a high clifvqb l zp uoq jr1:a5ek0-8p:n4f with no horizontal velocity. It lands 6.0 s later with a velocity un8oe1qjq z:k-a vl b0p:4pr5of 40 m/s. What was the initial velocity of the ball?

  95.27: A rocket near the surface of tvp2k85yx9tii he earth is accelerating vertically upward atp8y5 ikt9x2iv $10\;m/s^2$. 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 o4 hfl)1s te9bat 27 m/s at one instant. If it continues to fall, one second later the s e9obl4 t1)hfobject would be moving with a downward velocity closest to:

  95.39: A car starts from rest and (mo+n 9cjpea0 6-j gbfaccelerates 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 stpi4uufi13 k3 6senk6 arikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of the build4ii 33kap61 nfs6eku uing is approximately:

  97.09: At a certain time, an object in free fal pk2d)vcdeeqy : mr5u:iu(b. )l has velocity 4.0 m/s in the upward direction. What is the approximate velocity of the object one secon )ide.(5u k)cmy2b:pedrq: uvd later?

  98.14: How long must a;th+p: y ma+4 n/geyra $2.5\;m/s^2$ 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/s. If ig;nsz)cezr;)qi,v4v+ms 5 u5 wjh f3z t continues to fall, two seconds later the objem j,cr;+4zvqfivws)g 5 n3e5);zu zh sct would be moving with a speed of

  17.02: A small object is released from rest b- :o xftg,db 1gus+d;v cd)e4and falls freely for 4.00 s until reaching the ground. What was the height above the ground from which the o:4g1b gdt;ufv,cbx)o-d +edsbject was released?

  11.06: A ball of mass =0.100 kg is launched straight upward so*.fnz4vf fr4pqzl 2 o) that it rises to a maximum height of 12.0 m above the launch poin2ffo4p* q.l4z fn )zvrt. 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 = x1tobc/ai sz2l )8g9r0.100 kg is launched straight 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 relro1z i2s8ca9b/) txgach the maximum height from its launch?

  98.31: An object sliding down an inclined plane has speed5sn+g 66 sp6 :kpukgyr 0.40 m/s two seconds after it begins to slide. Approximately how far does it travel i6:p+r kg g6un6k5y pssn three seconds?

  98.40: Coin I is thro-1bvrjxa9 s4 8tvs 9bewn upward from 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 toabtjsvbx9e8- 4rvs19 wer 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 upwar(4nemn qd 0zk;g r8et(ds with twice the initial speed of another, how mn;e etmrz8k(n(q4d0g uch higher will it be at its apex?

  02.30: A box falls to the ground from a delivery truck traveling at 30 m/s. Afteiss ui4(m,0z q)m4fyu r hitting the road, iqiszf(u,4 m 0u msyi4)t slides 45 meters to rest. How long does it take the box to come to rest?

  03.29: An object is thrk tbpy3ut9zt b*0 +t1jown upwards with a velocity of 30 m/s near the surface of the earth. After two seconds what would be the diret+1p0t t93 jb* utbzykction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1hs(2fo oj gjyv-:945qyn5 oaj m, 2m& 3m) are thrown vertically upward with different velocities (1v, 2v& 3v respectivelyohyj-o no: y559sa4g2j(fjv q). 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 objectig vtc ,oi,)q-o.j 5uts are launched straight upward with identical linear momentum. Object 1 has mass M and reaches a maximum height H above the launch point.o .,o)q,j ii5vc g-tut 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 mj 72( htek(g60tgkr dbounces on the ground as shown. After each bounce, the ball reaches e(2 0rh7jd mkg6( tgtkone-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 second and third bounce?

  16.21: At 1.94 s after launch, a projectile in free falliwe axow3 oc 3c0)oa*: achieved its minimum speco* 3w oox 3eaaw0)c:ied during flight. If that minimum speed 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 vertq dxgw) j6w zka,6dd-l m3-er,ical cliff. The collision of the pebble with the ground below is se jazg) we,-kl6drm,- 6qdwdx 3en 1.50 seconds after the pebble is dropped. With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about the heighdel-7m6gpmn 01) sdg uoizt wnj/8 o40t 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 howd oumji0tw48/l-pn)dgnz0mse og 176 tall is the parking garage?

  05.07: A snail is moving along a straighkmr2gqu23 )engy -2z n2 -emkbt line. Its initial position is x0 = -5 meters and it is moving aw22 r km-q nmngg)-e3 kzeb22uyay 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 i :xcf+ue.rvtv )z,t.o s 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 z)xuer,..:ttvvc fo+ and that it takes negligible time.

  06.13: A rock is dropped from the top of a tall to14j oy6j uptmjs0) nw.wer. Half a second later another rock, twice as mass1jj suwyto0)jp n.m4 6ive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially movio)v4p cn 44go o8g5ywwng at 0.5 m/s along a track. The cart comes to rest after traveling 1 m.vcp4g85yngwoo 4o4w ) 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?

  07.11: A cart is initially moving at 0.5 m/b8g y-m.fhr *l rjg7(1+somvns 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 initially moving at 1 m/s. How far does the cart travel before coming sf-jbn7(.grhgylvr 1m +8mo* to rest?

  08.03: A dog starts from rest and runs i 8.ei1nia82.vrgu r qkn a straight line with a constant acceleration of g .2 kiv.rn8ra8iuqe 12$.5\;m/s^2$. 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 from a height h ar(n lur6mimvxrsl7/ g k/ 4e9 4m/qn6mbove the ground. If the ball falls th/rl7lnuegr9 vm4qx66 m s4ik/mnm/ (re 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 both move and uniformly accelerate to the righ6z-qg5yqrok-f) 27gqp ksk o8t. 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 Object 2 to that traveled by Oo7 g5p6oqyz- 2kg sk)rq8qf k-bject 1?

  12.26: An object is thrown horizontally wi y*ccozyoc96; th 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 reprec6yo 9;yzcc* osents the time of the object’s flight to the ground? Ignore air resistance.

  13.10: An object is thrown straight upwt 5 ig6wzc6/m*u bzny-ard. The object remains in free fall until it returns to its initial launch point. Which one of the foly65u-zzn/t w mc6b*ig lowing graphs could represent the velocity of the object as a function of time during its flight?

  14.03: An object is dropped into free fall,4(ob-0 l+z e0rwy tib zwsn8t. Through how many meters does the object zew8(rzn b otsltby,w0 0i+4- fall during the first 3.00 seconds of flight?

  15.02: A box uniformly slides 7.50 m to rest across a flat surface in a time of r rflaoq3g43y8cku(v2gn7 8 r12.0 s. What was the initial speed of the box gkr338q8 yuna7( lor2c4 grvfwhen it started its slide?

  14.07: Starting from rest, a cart uniformly acceleramw07 mu1d-1ltzs-wp i f76tpptes to a speed of 7.60 m/s in a timt1p tps0l-ud m7mp6-7wwz 1 ife of 3.00 s. Through what distance does the cart move in this time?

  14.16: A toy car initially moves w(o9: e(qu ustsngpv z+3 m(fheg* r2+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 stas9+*ez wtgo:v ( 2r (su(fqepnugmh +3rted. 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 to the right8bna5xn e4n** .lmq uj at 60.0 cm/s. Five seconds later, the car is moving at 40.0 cm/s to the left. The total displacnl*me5q* x .4bu nnj8aement 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 of the car during the five second motion?

  14.33: An object moves with constant acceleration startxh 6zi8gn 5u*zc*x 9ohing 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 moving upward while in free fall. b(i e8ja(bpw aw-u)4 yWhich one of the following choices best jpa(8 ebuw w)-a iyb4(represents the direction of the object’s acceleration during its flight?

  13.26: An object moving only to the right comp /9j4st mncyw* 7ura)bletes a 20.0 second trip in two stages, I and II. The average speed of the entire wnc/rs) b9*atm7 u4y jtrip 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 compl jn+o sixuxzbw4 )1x:1etes 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 lxx1 w bz1u4i:o) snjx+eft must the object have during the 8.0 seconds of stage 2?

  13.33: At the top of a high cliff, a small l -4/baro-bu(1: f5fx skftahp9tq; f rock is dropped from rest. A ball is launched straight downpa1lr59 b ao(u fft:hq 4ts/k -f;fxb-ward 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 rock?

  16.36: On a straight road, a self-driving car races wdf -ntas3nb.s+u bc78)z wqh-ith a robot. The robot accelerates atd83 ahbz-)+.uts w-fnnbcs 7q $8.50\;m/s^2$ 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. ; +igtlu 4:6*xo ehbgkThe vertical position of the ball 0.70 s after release is the same as it u:o+*lg6g xke hib;4ts 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 flight?