94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and objelswy2, 5::u x zffrn1nct 2 falls freely for 8.0 secolf , r: 5x2nu1nfsy:zwnds. Compared to object 1, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to a u tufmghh9+,ur;f9u.(q7m x eq7 z g6vfinal speed of 20.0 m/s in a time of 15.0 s. How far does the car travel duu .+ mh9 zfmfuv(6ueug7 x,hgt79q;qrring this time?

  94.03: A ball is thrown off a high cliff with no horizontal velorw*y zn9tvpdth p/2(4city. It lands 6.0 snwr(v9 d zpytht/42p* later with a velocity of 40 m/s. What was the initial velocity of the ball?

  95.27: A rocket near tuaa+t9 mk+p e/mgt+xj: ( d6ujhe surface of the earth is accelerating vertically upward a/gj a9umek:a++dtp6 j(xmut+ t $10\;m/s^2$. 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 .c vnyf-4qy8nm/s at one instant. If it continues to fall, one second later the object would be moving with a -v n4yqcy8. fndownward velocity closest to:

  95.39: A car starts from v rwt :qnr4c)(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 fro6edq6d b-z ujnl 4/4xem the top of a building strikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of the4-bjdle/46x nzde6q u building is approximately:

  97.09: At a certain time, an obje : vqj7qi;lb1s+zqv5jct in free fall has velocity 4.0 m/s in the upward direction. What is the approximate velocity of the ob:jqiv7+ q 1qj;vsblz 5ject one second later?

  98.14: How long must a u58y(xbj *8grh /eps;a)fs+ mun vfw:$2.5\;m/s^2$ acceleration act to change the velocity of a 2.0 kg object by 3.0 m/s?

  98.15: A freely falling object ipr .oav3k /s9hs found to be moving downward at 18 m/s. If it continues to fall, two seconds later the object wohv k p.rs/a3o9uld be moving with a speed of

  17.02: A small object is released from rest and falls freely for 4.00 s until re :14catf eb2pgaching the ground. What was the height above the ground from which the object b1 ca2pe:gft 4was released?

  11.06: A ball of mass =0.100 kgao3* t vkurm2nuvbge+n-b1)kv; w)9vjm f57z is launched straight upward so that it rises to a maximum height of 12.0 m above the launch point. Ignore air resist5g) ;vmnvn-kkbuu*7e123+wrm fzvv j9b)a toance. 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 icwb8p , : +8:/tjwdfw diyutb:t rises to a maximum height of 12+ w:bjw8d:u/dwtpitcf :,by8.0 m above the launch point. Ignore air resistance. Approximately how much time does it take the ball to reach the maximum height from its launch?

  98.31: An object sliding down an inclined plane has speed 0.40 m/s two sec*jn 3t9qf( oauonds after it begins to slide. Approximately ho u 3*an(tq9fjow far does it travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m tower w7lkx7g:9j fp nith a speed of 15 m/s. Coin II is dropped (zero initial speed) from the top of the tower 2.0 s laterpgl: xf77jn9 k. 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 with twice the initial a c.f(mcv*-gespeed of another, how much higher will it be at e(c .g v-acm*fits apex?

  02.30: A box falls to the ground from a delivc(x)7bjorkhzv ; p(o/ery truck traveling at 30 m/s. After hitting the road, it slides 45 meters to rest. cvhk)z rb;o((/x7op jHow long does it take the box to come to rest?

  03.29: An object is thrown upwards with a velocity of 30 m/s near the k :b2wwb4vsned)b 1:jsurface of the earth. After two secobd2bvskn 4wej)1:b w:nds 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 je 5(a+0dtglok 2m8ki.bs o6wthrown vertically upward with different velocities (1v, 2v& 3v respectivo8a (tgk. +s 25jmd60li boekwely). 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 a,hiwh:ag1ianv /(,vo bk(jz8r flsn 34*sao+re launched 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 launrz ((*3jg + i1s:i/soafa,hlw8 oannvh 4,b vkch point in terms of H ?

  04.28: A rubber ball bounces on the ground as shown. After each bounce, thv0hv,*hmtl6 bf 3zuibt9d/z 7 e ball reaches one- bd 3,v6ulih9vf /0zh7mb *ttzhalf 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 lauwqvg tv/ 8xh2m2:q, pjnch, a projectile in free fall achieved its minimum speed during flight. If that minimu8vqmg:x,q hj/wv2t2 pm 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 ce m(nnxhy 6x1 l)t6wn-liff. The collision of the pebble with the ground below is seen 1.50 seconds after the pebble is dropped x-mny xw6h) (le1tn6n. With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about (fvb c 5y sp+kuner:6)v .nr1zthe height of a parking garage. One student suggested that to determine the hei+6vnv)yks(u. zep 1n :crrf5b ght 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 iniu ja0:tzpd3v :tial position is x0 = -5 meters and it is moving awadj::tu3p 0 azvy 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 grav1it +mx2oy0brjyh w1lmmjw: 7u 49-xmity (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 p:uhmy x-2j xom9bm 4w7rwjyl+i01m1 toint 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 dropob+ 3 avnu;ri( yx).qcped from the top of a tall tower. Half a second later another rock, twice as massive as the first, is .n3va)(icq+ xboury; dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s along aeed 6lzicqp 0 3t)3*cpvoum.+ track. The cart comes to rest after traveling 1 m. The experiment is repeated on the same track, but now t03olu.tp6)ic edmv*q 3z p ce+he 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/s along a track. a;5hue*;tv)j bwjga v4 3 p:ghThe cart comes to rest after traveling 1 pht w4 jv *a5ghbg j)3av;:eu;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 a azp -;kym,d3few 4 /;8)ylsrv;q ynyyconstant acceleration of m qvn;eydy83 py slzy- ,;yk4w) fr/;a2$.5\;m/s^2$. How much time does it take for the dog to run a distance of $10\;m$?

  10.29: A ball initially at rest falls3/dti serk;o45vtl z.l a(;mx without air resistance from a height h above theao 35 xitst. ervlk4;;ldz (/m 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 move and uniformly accelerate to the right. At time t=0 kxgox kdij+wy+g7,jfl7- n)(,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 velowg7xo ngjkk -lji x7y+),( d+fcity 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 horizontallyjca.np -erads)8 d22m with speed 10.0 m/s from a height H above the ground. The object r2e)dca p a8mj-sd.n 2reaches 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 thrown straight upward. The object remains in z6ewxhkps4 -y-lh 0m0free fall until it returns to its initial launch point. Which one of the following graphs could re0 s60h-ep mlw -kxzyh4present the velocity of the object as a function of time during its flight?

  14.03: An object is dropped into free fall. Through how many me i8zdh,dj (nli,qq8ixxj+yt)o)3: uuters does the object fall during the first 3.00 seconds of onjd8,j8 x xqthdq,u(li iz3)yu:+)iflight?

  15.02: A box uniformly slides 7.50 m to rest across a flat surfaceg qe(nsmf2f2* in a time of 12.0 s. Whn2fs*g(2 mfeqat was the initial speed of the box when it started its slide?

  14.07: Starting from rest, a cart uniformly acc+w7ra hjgkf qvj jz.8bk8y79-elerates to a speed of 7.60 m/s in a time of 3.00 s. Through what distance does the cart move in t.j-8kjf7jv7 ahzbkrqw y+98g his time?

  14.16: A toy car initially moves tni nar53h)ta4o 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 velocity of the car during the five second 5)i4 r3hnat namotion?

  14.17: A toy car initially moves to the right at 60.0 cm/s. Five seconds later, xov2 7r44x 7-exwval uthe 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 the car during the five second motiox7w4 r2-v v ea47oxlxun?

  14.33: An object moves with constant aczyax9 0hbqc;-jf 8q d1,e c5h;z72 rjqkla6egceleration starting 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 initiall3gi 7t)qcl/dty is moving upward while in free fall. Which one of the following choices best represents the direction of the obi )gq/tl73dtc ject’s acceleration during its flight?

  13.26: An object moving only to the right completes a 20.0 se+;b 8zzkg1bplcond 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. Whlg 1zp8k;b+ bzat constant acceleration must the object have during the 8.0 seconds of stage II?

  15.32: An object moving alonpt+v21 xta-px 9tilx)g 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 with a constant velocity of 6.0 m/s t tl91x2-ipvpx ta)+ txo 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 cliff, a small rock is dropped wp0qc eljd69)8kv2 - j6djn ns(v dm7lfrom 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 dropq k-nv7djdjj(e0vmlcln6) sd 8 9w62pped. 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 robot. Thea 32l;;yc 2exn4dairi robot acceleratli x2r ;i;4e3 2nyacades 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 verti .;bxh)jmy-mpt4t kr0 cally upward. The vertical position 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 a; pbrmtk4). xhmyjt-0t a vertical position that is one-half of the maximum height it obtains during its flight?