94.01: Starting from rest,; p.oebkl :v t- 1;v98rs*accgr6hk ap object 1 falls freely for 4.0 seconds, and object 2 falls freely for 8.0 seconds. Compared p8vgoa as;l b.kcph9t6c-1;: re * rvkto object 1, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to a final speed of xsn8d 6qcyd+1 20.0 m/s in a time of 15.0 s. How far does the car travel during thiq8nc6sd1x dy +s time?

  94.03: A ball is thrown off a high cliff with no horizontau+/k sh7vm( .)wtqrq :07xdlsdh8hw tl velocity. It lands 6.0 s later with a velocity of 4txr:whh+ (sv dk s qh/7.8udtlw)7q0m0 m/s. What was the initial velocity of the ball?

  95.27: A rocket near the surface of the earth is accelerating veofy9wl) 5*ppvrtically upward aovwp5y l)p*f 9t $10\;m/s^2$. 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 7e gv9cez26 dgone instant. If it continues to fall, one second lze eg g6d79v2cater the object would be moving with a downward velocity closest to:

  95.39: A car starts from rest and ac4 l ooi:-8cmtvcelerates 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 groun:lgd .tfx* :zkhhz:+)x pht2rd with a speed of 30 m/s. Assume air resistance can be ignored. The height of the building id h fht:)xz:.z+t lp:xhrk2g *s approximately:

  97.09: At a certain time, an object in free fall has velocity 4.0 m/s in the upwb u+(i2dbhsqo)i3ls / ard direction. What is the approximate velocity of tu q )/sbidl3ho2s( bi+he object one second later?

  98.14: How long must 8s-o6tz2yko 46-3+p1qprkb ppjodp o a $2.5\;m/s^2$ 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 downwfjt6uz) .j4bgpplr2 a wk.5m;ard at 18 m/s. If it continues to fall, two seconds later the object would be moving 4pfja) m;gt.l6z r2upb jwk.5with a speed of

  17.02: A small object is released from ralg 489 jlm,fzest and falls freely for 4.00 s until refla,4zg m 9jl8aching the ground. What was the height above the ground from which the object was released?

  11.06: A ball of mass =0.1:e1nlfi85sy; n cu toq,,-xno00 kg is 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 maxeof1c; n:8 q nyxnl5 ti-,osu,imum 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 launched straight upward so that b/t2s8+o ix8mr2uzoa/ zg 7 qoit 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 reach thm/+b8 i2u /toxaoz8go z qrs27e maximum height from its launch?

  98.31: An object sliding down an inclined plane has speed 0.40 m/s6oo(n9xc0jg eeyy*+ u two seconds afe un9( xy*60cgeyoj +oter it begins to slide. Approximately how far does it travel in three seconds?

  98.40: Coin I is thrown upward from thejo- dxmb) qmwa :2+2gvx9r5untq.p + c 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 2.0 s later. Assum5+ x2noaq ug :jvr.-2mtqx dw9c+pmb)e 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 yyb:0.bhb 4t twith twice the initial speed of another, how much higher will it be ah :yb.04 ybttbt its apex?

  02.30: A box falls to the gr3kgzk/ zj c369oj; subound from a delivery truck traveling at 30 m/s. After hitting thekokscu39jzg/6; bzj3 road, it slides 45 meters to rest. How long does it take the box to come to rest?

  03.29: An object is c0jo 6q pox0xj,x4kfx; rbq,7thrown upwards with a velocity of 30 m/s near the surface of the earth. After t,ox0jbo,q ; q4p7 jckxrx06 xfwo seconds what would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3m) are thrown vertically upward 58znj7vz-sb (tv 2dlfwith different velocities (1v, 2v& 3v respective-ldb (f5 jzsvn27z8t vly). 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 lauom0r d(4ftw +p3p/ jdwnched 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 the launch point in termspdf/ dp(o 0mtwj 3r+w4 of H ?

  04.28: A rubber ball bounces on the ground as shown. After each bounce, the 4ew fuer p n 2-9egq1kj6o::evball reaches one-half the height of the bounce before it. If the time the ball was in the air between the firsvnore4e:p e :2uf-qk9 16 gwejt 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 falry gy5,rkxu * .0egi(d)st9 l, 8o.rvdu ovgx5l achieved its minimum speed during flight. If that minimum speed was 15.0 m/s, what was the projectile’s initial angle of launch from the horizogy)gr,uygos5(d8e v5xlx.,vtdo* k r. 09iur ntal?

  05.02: A pebble is dropped from a high4+csd + hs3m9qdh )izd vertical cliff. The collision of the pebble with the ground below is seen 1.50 seconds after 4hcsd)zd3+ qsm+h9i dthe pebble is dropped. With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about theur) 88n+ u8nhkvwy e+y height of a parking garage. One student suggested n 8yykvunh+e +ru8w8) 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 parking garage?

  05.07: A snail is moving along a straight line. Its initial positi3cnkg,1y0(q tgh,j emon is x0 = -5 meters and it is moving away from the origin and slowi,gkngeh3 ,y c1(jqm 0tng down. In this coordinate system, the signs of the initial position, initial velocity and acceleration, respectively, are

  04.38: A small point-like o+r tox3v r3-mfbject 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 xtor3v+3-rfm 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 towfn6 z7rlg-kr8 er. Half a second later another rock, twice as massive as the first, is dropped. Igno n8r g-flkzr67ring air resistance,

  06.18: A cart is initially movinee hf:ipr30 (uhs 91png 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 initially movh 3ppi0serh(91 fun :eing 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 alongr,8x2s c6a. lsr8z0nruw u-hm 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 t6 srn -xmw08aurszh .2, uclr8o rest?

  08.03: A dog starts from rest and runs in a straigh4f 0zoj-,2 bq5;pjhkv oo+ )pp+ gzo7qkcc8nxt line with a constant acceleration ok 7+84p; p- nbq)gohoczp5vofqzj 0 +2ckx,jof 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 air resistance from a hef e(0e0dd1*kn/ph b oauu/ +whight 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 dieud/fbhd k0a*/w eu1p(oh n0+ stance of 0.5h?

  10.38: Two objects both move and uniformly accelerate to the right. At time tzy,p c7*y4n0 f hg)vvr=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 travg*vr)7y pv nyzh c,40feled by Object 1?

  12.26: An object is thrown horizontally with speed 10.sp.pvve (/q4u) b+14w5g en;inszrn n0 m/s from a height H above the g+ n(nn e p/ 51gbn)s4evqu zp;vsw.r4iround. The object reaches the ground with a speed 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 czz 6zt. xk7e 9lg1)y) x*fcn/6gjn lnthrown straight upward. The object remains in free fall until it returns to its initial launch point. Which one of the following graphs could ren z)necnl6*9j /lzx6c).1xgyz 7 t kfgpresent the velocity of the object as a function of time during its flight?

  14.03: An object is dropped into free fall. Throug4 j8y fxlqa94dh how many meters does the object fall during the first 3.00 seconds of flight?8 f9dxyq4a 4lj

  15.02: A box uniformly slides 7.50 m to rest across a flat surface in a time of e l.q2 wl3k ww;ibc);i12.0 s. What was the initial speed of the box when it stabliwl;ekw2q 3.c ;i)wrted its slide?

  14.07: Starting from re0ms 4 pnf5p9al6 hscf6st, a cart uniformly accelerates to a speed of 7.60 m/s in a time of 3.00 s. Through what dista9msp6c hf 60lfn4ps5 ance does the cart move in this time?

  14.16: A toy car initially moves to the right at 60.0 cm/s. Five seconds la0w co br:4kvn/ter, 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 mvrc/no0kb 4w: agnitude of the average velocity of the car during the five second motion?

  14.17: A toy car initially moves to the right at 60 ch/ug.75x 2ekmz1dq f.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 ac1 zumc fqh5 kx2/7dg.eceleration of the car during the five second motion?

  14.33: An object moves with constant acceleration st:7ag1 ou mse.qpra. j0arting 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. Which on3zuv6g 6qb6:uh- ;mnr1ihqx qe of the following choices best represents the mg:u q hbn3izxrqu1h6;v 66q -direction of the object’s acceleration during its flight?

  13.26: An object moving only to the right completes a 20.0 second trip in twomcmz/wc8o n56ly 4q)m 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 constanty)4c5 nz cm6lmw8oqm/ 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 second trip 0hqaluxiwj yxp(18 ( :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 righa(xiqwlh 8up x(j 1y0:t 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 rest. A z, wbs1cxu*hnrlqk9bv6*1*s: 5k 9bwb3s tu rball is launched str5 b:w**9tz 9 ln rkvsw ru*sxbu,6kqbc1 31hsbaight 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 rock?

  16.36: On a straight road, a self-driving car races with a r3y* 4jyil 9xwhv0ie)tobot. The robot accele)l xhi3tewi*4vy0y 9j rates 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 vert 5qtmavn 6+/wtically upward. The vertical position of the ball 0.70 s after release is the same as its vertical position 4.10 s aft q/vn5a t+mtw6er 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?