94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and objecd52x47 *mlyhzb b/ z z/q+enwft 2 falls freely for n+qmfz4b hy 2zedl/5x b*/zw78.0 seconds. Compared to object 1, object 2 falls:

  94.02: A car starts from rest and uniformly acceleratqw):xjwl9y(9;eulriz j qamj +t4e /+es to a final speed of 20.0 m/s in a time of 15.0 s. How far does t ji9e(4mjy wre9lu;w+) laq/+jqtzx: he car travel during this time?

  94.03: A ball is thrown off a high cliff with no horizontal velocity. It land i;07a7 rdoz zh; slver.mal-(s 6.0 s later with a veloc7(al l h rze 0i-;;mavrz.7dosity of 40 m/s. What was the initial velocity of the ball?

  95.27: A rocket near the ymvp xg46d(a*r. 9uausurface of the earth is accelerating vertically upward ( ud ug64*rav9xpy.maat $10\;m/s^2$. The rocket releases an instrument package. Immediately after release the acceleration of the instrument package is:

  95.13: A freely falling body is fme0 ko*6o6 hvpound to be moving downwards at 27 m/s at one instant. If it continues to fall, one second later the object would be moving with a downward velocity clve 0*moo6h k6posest to:

  95.39: A car starts from rest and accellr2o-d fz 2*fserates 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 stxje tbv6/ 7(9qmvwv .arikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of the buwv/6v. (vexqm9j 7tab ilding is approximately:

  97.09: At a certain time, an object in free fall has velocityk:sukk-4v k q2lahnc5 xoh1(0 4.0 m/s in the upward direo(h1kku- lvk aq54c2kx :n0shction. What is the approximate velocity of the object one second later?

  98.14: How long must ,pyet 6c,dq ss 9n:dx-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 falling7jvrgd;h 4ik) l60.evk:oe ts object is found to be moving downward at 18 m/s. If it continues to fall, two seconds later the object would be moving with a speed vrvh7g:it;.l)sjk 6oe 4d0ke of

  17.02: A small object is released from rest andkj x0cxy;. by-gw..av falls freely for 4.00 s until reaching the ground.xc0v;a. wybx. - kjg.y What was the height above the ground from which the object was released?

  11.06: A ball of mass =0.100 kg is launched straight upward so that it rises taxyhv.nw u -1(o a maximum height of 12.0(a. -uxyvn hw1 m above the launch point. 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 =0.100 kg is launched straight z7u aomp 0by lr04/p(mupward 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 reap mzba4/07 p0o(lymruch the maximum height from its launch?

  98.31: An object slidi a hbye::yst.yy s4h+0ng down an inclined plane has speed 0.40 m/s two seconds after it begins to slide. Approximately how far 0sy.y syt :h4+e:haybdoes it travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-; yjs m1mvbfx:es6i2c (aj :/lm tower with a speed of 15 m/s. Coin II is dropped (zero initial speed) from the top ;v1 2jc(bsl sm j:y/ xi:fae6mof 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 tj wvsv8d:3g :je;upr /7,ljv4a u3kfdirectly upwards with twice the initial speed of another, how much higher will it b :3weapj3,4djv ;8:gt/ frsv u 7kjlvue at its apex?

  02.30: A box falls tt4w2iqmgb/d 7 o the ground from a delivery truck traveling at 30 m/s. After hitting the road, it slides 45 meters to rest. /t4 7dmwiqb2gHow long does it take the box to come to rest?

  03.29: An object is thrown upwards with a velocity of 30 u0 9vei *(etzwm/s near the surface of the earth. After two seconds what would be the direction of the displacemu0evi9*w(ze tent, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones dn8 lj 0:-6j ,nptexdhn9p6w sof different 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 sdx ,0ljd 6 8nste-hnwpp6:9nj tone. Assume air resistance is negligible.

  10.25: Two point objects are launched stra- dw9zb iw7c8j og5xf-ight upward with identical linear momentum. Object 1 has mass M and reaches a maximum height H above the launch pj8-bc w9x75dfog -w izoint. 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 bounces on the grouc- 3-c o guh(dey5 g)nap/+lamnd as shown. After each 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 time bep/onec(muh)y 5ggl3-dc-a +atween the second and third bounce?

  16.21: At 1.94 s after launch, a projectile in frvi2.j y :tgt+xrhgm0)ee fall achieved its minimum speed during flight. I g)2gx.tyj:0 t+hmvirf 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. The collisio,(e qhivpr u;*n of the pebble with the ground below is seen 1.50 seconds after the pebble is driv (r *qp,eu;hopped. With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about the height of a par2g.re ;6 aygmrking garage. One student suggested that to determine the height of the garage, they simply had to drop tennis balls from the2a er.y rm;gg6 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 movingrxra(f k56 y/z h0avk8;k r;ej along a straight line. Its initial position is x0 = -5 meters and it ie/rjxk(y 6f k;5h; varrk8z0as moving away 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 is pulled downwards by grava/7s5za,s irm8qd0ij ity (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 li,rm jsaz8 7a/ id0qs5ongest 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 serld) ya ,2f)cqcond later another rock, tw2a yl,))fqrd cice as massive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s along a track. The - 6u+rc2suj;wmnckn1;f t +ancart 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 to r uwjn+amk;u sn; n2ct6-+c1f rest?

  07.11: A cart is initially moving at 0.5 m/sh;/z,a m w)+ud qwiu2n 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 to re+wu /)n2qdwm;ahz, u ist?

  08.03: A dog starts from rest and raa9 a5(uds xj4uns in a straight line with a constant accelerati9s(aud4aa5j x on 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 initia h7 jb0c91f lnng,d:kn bl8av,lly at rest falls without air resistance from a height h above c9nf: 8 nnla g7,l1hdbv,0 bjkthe 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 0.5h?

  10.38: Two objects both mow2y80hwoz6 e -xso)gyve and uniformly accelerate to the right. At time t=0,the objects are at the same initial position. Object-6wyow)8z yg seh xo20 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 hp3na v3)e,pslorizontally 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 following choices best represents thelpv s 33,nepa) time of the object’s flight to the ground? Ignore air resistance.

  13.10: An object is thrown straight upward. The objeci/pxc oaa 41or xqio:32jl3 d8t remains in free fall until it returns to its initial launch point. Which one of the following gro /d rl8ip2oqa3aoijx134c: xaphs 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 ho* 1 rjvk7b2zbgw many meters does the object fall during the first 3.00 2zv1kr*gb7bj seconds of flight?

  15.02: A box uniformly slides 7.50 m to rest across a flat surface qw 8 7 ,t1toxyqs.v;4w(eihonin a time of 12.0 s. What was the initial spehw4 sy 81v.qon,(i qto; xwte7ed of the box when it started its slide?

  14.07: Starting from rest, a cart uni, ,p mox5q buo9p3bp0kformly accelerates to a speed of 7.60 m/s in a time of 3.00 s. Through what distance does the cart move in this,39bpb5 k ,o0pu pqoxm time?

  14.16: A toy car initially moves to the right at 60.0 cm/s. Five seconds lateng64tzz0nu 4jevvt f3ku ./+fr, 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 followin e 044zjtzut.v/+v6nffg nuk3g 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 right at 60.0 cm/s. Five seconds l9vs t -fwfqd4+v d.ik0ater, the caf.i0t9-v+4 vdfkdqw sr 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 the car during the five second motion?

  14.33: An object moves with constant acceleration starting with veloc8s. 2w cgpewct3te 3hknd opa3 717qx*ity $v_0 = 5.00\;m/s$ 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 injtz;1l7xx tf;dwcjtj(b68:j free fall. Which one of the fox7w dt lfj1(z;t; :jjbt8xc 6jllowing choices best represents the direction of the object’s acceleration during its flight?

  13.26: An object moving only to the right completp6+h fs0rk: hhes a 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 velocity of 6.0 m/s for 12.0 seconds. What constanskp h0 hf:+h6rt acceleration must the object have during the 8.0 seconds of stage II?

  15.32: An object moving along a line com*m7op+jktd ) tfw(o +ypletes 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. Whytkjd)7 fm*opot ++(wat 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 r(p 9fe * gssxq5d-)embest. 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 fq)d95* ess-m epx(bg 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 robot. jf ;+x0c(q q49aea bgct61qc dThe robot accelerates aqjac6qg 0b;x (a +9q1cc4t fdet $8.50\;m/s^2$ 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 th(knu+6uk 71xcwfw 9 zfe 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 iu1 xf 6fk+(z k7u9wcnwt obtains during its flight?