94.01: Starting from res*(cffg7ba lr ,;2wceh (kmb);q u6nzit, object 1 falls freely for 4.0 seconds, and object 2 falls freely for 8.0 seconds. Compared (;u ;bw ,hc)2qil b6z k(*fmegfr7acnto object 1, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to a final speed of dw(-, .),isiz oneskc 20.0 m/s in a time of 15.0 s.szn ik(ose- , d,i.)cw How far does the car travel during this time?

  94.03: A ball is thrown off a high cliff with no horizontal velocity. Itnv86d/7b zf d0+ns1fn osioq( lands 6.0 s later with a velocity of 40 m/s. What was the initial vezn fd 0o7sbi/+nd8( fs61qno vlocity of the ball?

  95.27: A rocket near the surface of the earth is accelerati, l zc,9-esxwkx 2jovnve d8++ng vertically upward at e+, x+-v8 s, 9zwvnxcjo lkd2e$10\;m/s^2$. 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 downr(7pjgfi2ma r dq;xi ::8u*te wards at 27 m/s at one instant. If it continues to fall, one second later the object would be moving with a downwar2t r:p (mdi iugeq8x*:f j;7ard velocity closest to:

  95.39: A car starts fromflp96ph oih:sxl( 77 (46e h uuqcqwa2 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 building strikes th17t eiz+;rsn vbqy v31e ground with a speed of 30 m/s. Assume air resistance can be igno+1b;rzenq73 t s vivy1red. The height of the building is approximately:

  97.09: At a certain time, an object in free fall has vy/ 3ddo j00 7uu8;in*je mhfr 8orp7weelocity 4.0 m/s in the upward direction.huf d8j 0n;o7ied uwo /30mpej7rr8y* What is the approximate velocity of the object one second later?

  98.14: How long must zk62zj sf l 7w:4d8:elfmq efrdk.cm320pn 3za $2.5\;m/s^2$ 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: fdh)mrz 8n:v,sfo.v 18 m/s. If it continues to fall, two seconds later mo h )8,z:fdv.fnv:r sthe object would be moving with a speed of

  17.02: A small object is released njfd.l j i1drkt c3d2)p e5x0u0p5l4yfrom rest and falls freely for 4.00 s until reaching the ground. What was tn52 ei5j )lukd. yxd1j3ct 4 fl0p0pdrhe height above the ground from which the object was released?

  11.06: A ball of mass =0.100 kg x-g72 n q)bohpis launched straight upward so that it rises to a maximum height of 12.0 m above the launch point. Ignore air resistance2ph b7oq -)nxg. 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 =0.100 kg is launched straight upward so that it rise0 sdqnsfgbfh+ z1dh*-1acs 46s 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 the maximum height from its laun*fgs1zq 6ns ahdh4 - +1sc0bdfch?

  98.31: An object sliding down an inclined plane has speezmq x+ss5ym5,i * liv(d 0.40 m/s two seconds after it begins to slide. Approximately how far does it trxzi 5m qs+vsl5(*,yimavel in three seconds?

  98.40: Coin I is thrown upwar tq0o.)crd w p-c9eqr6d from the top of a 100-m tower with a speed of 15 m/s. Coin II is dropped (zero ini)oc-r6pct9 q0q. wde rtial 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 r 6la zxq)5*xp+kgj -rthrown directly upwards with twice the initial speed of another, how+ gzl *k5j- )pxraqx6r much higher will it be at its apex?

  02.30: A box falls to the ground from a dx; mq0xn3ebt 1)wba6oelivery truck traveling at 30 m/s. After hitting theonae 1xtq;b6)0wx m 3b road, 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 of 30 m/si.bjhkf5 /9jk b ;wa2cad1: (p2skjpf near the surface of the earth. After two seconds what would be the direction of the displacemefj bc/ka: hpd2i; j(f bkj spk2w.a519nt, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of di0.kbj coz4 rv*fferent mass (1m, 2m& 3m) are thrown vertically upward with different velocities (1v, 2v& 3v respectively). The diagram indicate4*jvzr b k.0cos 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 identica fn.lea q -wr3q8nk4)tl 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 pointa-et3 qnf.4q)n kwl8r in terms of H ?

  04.28: A rubber ball bounces on the ground as shown. After vi g:yv-4 rhd9each bounce, the ball reaches one-half the h-hvgrvi :9yd 4eight 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 7vnn sf)r(;uj onjbu 0rvx (a,t +20eylaunch, a projectile in free fall achieved its minimum speed during flight. j(vj)e xf;su,0+0r 2unty (n7orbnavIf 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 vertical cliff. Tht-lp w7fspd3mi;g bz(07bhr .e 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 zd(.0f7wh-i l7br p 3ptsm;g bthe ground? Ignore air resistance.

  06.03: Three students were arguing about the heipbxpi /hwsmoy785b x51,3h r:n d k6dught of a parking garage. One student suggested that to determine the height of the garage, they sir knh 3516ydop5xbbx/7 8, :suwdimphmply 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 position is x0xz*gzw 04c qs; = -5 meters and it is moving away from the origin and slowing down. In this coordinate system, the signs of the initial position, inw0qg;x4zc*s zitial velocity and acceleration, respectively, are

  04.38: A small point-like obt* /u.jqbs5bd ject 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 and that it takeb/bs*udj.t q5s negligible time.

  06.13: A rock is dropped from the top of a 2 ov.z-zbs8j dtall tower. Half a second later another rock, twice as massive asz.s2 vdb- jz8o the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially mtciqp f (s52a(k(2cx;vuq. pyoving 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 moving at 1 m/s. How far does the cart travel before coqiysf25p( (.(kpcu q; a2ct vxming to rest?

  07.11: A cart is initially moving at bu f*ejnj7zh/*ou3q10.5 m/s along a track. The cart comes to rest after travelinouhn7 /*jb1 *3qje uzfg 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 ak7i,e6 njx)0u6 5sz xub5ffjp constant acceleration e0 6 pskn5jzxuj)xf67 u,bif 5of 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 /(aiu4ubju+0xg/cb u 6l aw k6without air resistance from a height h above the groujbc (biug64au/a u6w x+0ulk/ nd. If the ball falls the first distance 0.5h in a time t, how much time is required to fall the remaining distance of 0.5h?

  10.38: Two objects both move and unifcm ux2t+nv7 *aormly accelerate to the right. At time t=0, vatnc*7 2xm+uthe 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 Object 1?

  12.26: An object is thrown horizontm zd:xo 0f ,oy:abkx yr hw6wkja20am/7:xe8/ally 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. Which one of the followjmx fhyz :oemk6o /0x8w,/:d b2w7xyka 0r :aaing choices best represents the time of the object’s flight to the ground? Ignore air resistance.

  13.10: An object is thrown straight upwarll.1v2gj qn7 1 y+lfz*ozbq c9d. The object remains in free fall until it returns to its initial launch point. Whic9 .zl 7+yvf2zgnb l11*ql cojqh 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 dropped into free fall. Through how 9crr) (zl:h k,cv8xmi many meters does the obj)r(cx r9:lc ,h kv8mziect 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 ti ij eeb;qhtf1ks5(0iogbt4/+gjbqrc,g 9 4 *hme of 12.0 s. What was the initial speed of the box when it started its slic5i 1k9+fqh4osb,4t 0* ;ei h( br gj/jbqgegtde?

  14.07: Starting from rest, a cart uniformly accelerates to a speed of 7.67z a mukq um0vb2nk;ok:y5*r00 m/s in a time of 3.00 s. Through what distance does the car m*k kqmb:z 5;0nuu0kyvrao27 t move in this time?

  14.16: A toy car initially moves to the right at 60.0 cm/s. F2vy 4at bvsgr rkim-/e v0bu54dyb; /7ive 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 repres 4se4auyi/vvrrb tk yg /2v- 0b7;mbd5ents 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 cm/s. Five secondsflq5d 7hd s.*n 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 of s fq7ld*dh5.n the car during the five second motion?

  14.33: An object moves with constant acceleration 2tc +mk/0:nb( oyks 4*01;ynxd e j fdirsw.pzstarting 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:.l*r/-3fjlzxu7goda/drrra.* x ef one of the following chua x edf*//lg rlx3r: -*z.7ajofrd r.oices best represents the direction of the object’s acceleration during its flight?

  13.26: An object moving only to the right completes x yf92)cj: w+egw1i rba 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 veloci r:)y2cfwbw9x1+eji gty 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 moving4lk-tx 1iwv2 g 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 witkxl -t12igwv4 h 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 8.0 seconds of stage 2?

  13.33: At the top of a high ckq,vv;*g4 o u ftj6n6imlj,k;l.y 2 bbzc.-oeliff, a small rock 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 eqy;utb6j lk.4c,n2vfv k i .* jbgo;6l,zom- the speed of the ball relative to the rock?

  16.36: On a straight ypx1 , ,ewmx.s8mx;c6 ptdsv9road, a self-driving car races with a robot. The robot acceleraty8spx, sxcmxep91m dv6t; w ,.es 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 podx7-wc6er / cusition of the ball 0.70 s 6cw-d 7ercx /uafter 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 during its flight?