94.01: Starting from rest, object 1 falls freely v.z k46fhxp x7exb.r/for 4.0 seconds, and object 2 falls freely for 8.0 seconds. Compared to object 1, object 2 falls: fv4/k7 .xbxpez.rhx6

  94.02: A car starts from rest and uniformly h)t7 db fzl lf 6nrh,xn6k.+)aaccelerates to a final speed of 20.0 m/s in a time o fh,6a k xtfnlb.hrn)z)7d+l6f 15.0 s. How far does the car travel during this time?

  94.03: A ball is thrown off a high cliff with w(7e8 7r)xdb1 bchr)hl8ykd tno horizontal velocity. It lands 6.0 s later with a velocity of 40 m/s. What watdbw l x)7brhcr718k8e)(h dys the initial velocity of the ball?

  95.27: A rocket near the surface of the earth is accelerating vertically upwarr, f j-qd8i zm+ xnevp4 ta;07m+jxw/yd 0a /f7j+zy; e m+v qxjtm ri8pn-d4,xwat $10\;m/s^2$. 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 one in el :cgbjyi,;2stant. If :;yil 2e,bjgc it continues to fall, one second later the object would be moving with a downward velocity closest to:

  95.39: A car starts tey u2y61 orl:from 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 fpqq2b- 88v2h;uv )go 2z .crnrm.nzdsrom the top of a building strikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. The.zon-2qu2dmvr q2s bh)p.r; gcvz8 n 8 height of the building is approximately:

  97.09: At a certain time, an obj6 d8. jjjixdb3ect in free fall has velocity 4.0 m/s in the upward 6ijbddj8 3 x.jdirection. What is the approximate velocity of the object one second later?

  98.14: How long must a *eh ynm* lv3d+9delc 8mhq/m + gsf0v($2.5\;m/s^2$ acceleration act to change the velocity of a 2.0 kg object by 3.0 m/s?

  98.15: A freely falling object is foun* q6py +ov(z/7muujgsd to be moving downward at 18 m/s. If it continues to fall, two seconds later the object would bevgzsyu (qu *6mo+p/7j moving with a speed of

  17.02: A small object is released from rest and falls freely foj r) iehf 7c8 0ik7b91+ck.xydumd ip0r 4.00 s until reaching the ground. What was the height above the ground froy x0rep+kdi 1mfd)0.j97iu7 8h kbcicm which the object was released?

  11.06: A ball of mass = +y*7kzfpkys/1 ugpc)um,ns7 0.100 kg is launched straight upward so that it rises to a ma,u *y7+m1spkf/z)cs gy7 unp kximum height of 12.0 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 sf366ibdb+(nhm dpf m +traight upward so that it rises to a maximum height of 12p++6b(mdf fb h3i6dnm.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 planm6y7z/h. ( qv w4he9ssucxx8n e has speed 0.40 m/s two seconds aft8h qx9e4(mv czsyw su/n.h67x er it begins to slide. Approximately how far does it travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m tkzvxt+z8d;ndix us9 +1 05 vbrower with a speed of 15 m/s. Coin II is dropped (zero initial speed) from the top of the tower 2.0xu0i v 1;d+5zx tznbrksd89 +v 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 upwards with twice j2q+0go58io(u msq pothe initial speed of another, how much higher will it +oj8oqom gqu(52i0ps be at its apex?

  02.30: A box falls to the grounor h qjk.5ov )ac.5:frd from a delivery truck traveling at 30 m/s. After hitting the road, it slides 45 meters to rest. How long 5rko a 5f:.qjo r)c.hvdoes it take the box to come to rest?

  03.29: An object is thrown upwards with a r/rrs60o0gbl. 3jdtg velocity of 30 m/s near the surface of the earth. After two secg r /.tdjr 0bro06l3gsonds what would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of cdde3c)x* fmq l4g z320tdl:x different mass (1m, 2m& 3m) are thrown vertically upward with difl3 2lmdc t*4c:0xzexdqg)d3 fferent 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 stone. Assume air resistance is negligible.

  10.25: Two point objects are launched straight upward with identical lineae-num 2+9mksr r momentum. Object 1 has mass M and reaches a maximum height H above the launch point. If object 2 h2 9ksur-n+em mas mass 2M, what is its maximum attained height above the launch point in terms of H ?

  04.28: A rubber ball bounces on the ground as shown. After each :0 3rbiy j/qedbounce, the ball reaches one-half the height of the bounce before it. If the time the ball idq/ebj03y: rwas 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 fall achieved int gypl6* zb.8r5p9d tts minimum speed during flight. If that minimum speed was 15.0 m/s, what was the projectile’s initial angle of laun*dbyg6lzt 89t pp. 5rnch from the horizontal?

  05.02: A pebble is dropped from a high vertical clb u wdwjc47efkb.*f* 1iff. The collision of the pebble with the ground below iswfub f** de471k.cwbj seen 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 height of a parking garau)k1jd swx(; m1b*ir dge. One student suggested that to determine the height of the gara(dm;1) *swrxub dk1ijge, 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 a3 mj1 (/ fvx+.mv:ze:rwbl irq straight line. Its initial position is x0 = -5 metersx3(: frbi1le. w:mqvmz+vrj/ and it is 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 downv7f y+3fc drm:wards by gravity (down the plane of the page) but is constrained to exactly follow each of the frictionless pathways shown. Rankr:3myv f+ fcd7 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 takes negligible time.

  06.13: A rock is dropped from the top of a tall tower. Half a second lated7pgdmi87x py* 44 nr*nngwy( r another rock, twice as masri x78pd dy n *gngm(wn44y*p7sive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s along a track. Tccjek5 7xk kedn5*n+ -he cart comes to rest after en5kj xed- kn+*5c 7cktraveling 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?

  07.11: A cart is initially moving at 0.5 m/s /pzwleu0m;) bjxtxs5n ;wz2 8 3ez.vmalong a track. The cart comes to rest after traveling 1 m. The experiment is repeated on thu.x;5pmxmlb 0 ; tz3zwsevz8j 2wn )e/e 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 constant acceleqt9u ggyo;st ;+h,*dimrvv9c.dt,u 2r*c yq vumvdh;9.+o29g , tsgit d;,utration 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 initial36f /zsjoryeuj 105ydly at rest falls without air resistance from a height h above the ground. If the ball falls the first distance 0.5h in a time t, how much time is required to fall thejzorsyjy 3f 1u6/5 0ed remaining distance of 0.5h?

  10.38: Two objects botom wtlbvji7 d/m3udc ;4 8l0s+rmu8 q )q9lne:h move and uniformly accelerate to the right. 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 Objec +vdb7i rtnq0/uel8qll;ow49m8mm jd 3s )uc:t 1?

  12.26: An object is thrown horizont+ wxs(noc*j-. myl9 meally 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 the time of the object’s flight to the ground? l(em9w-y. jonc*m+sx Ignore air resistance.

  13.10: An object is thrown straight upward. The ob c47v8lexd9ltay0h d 5ject remains in free fall until it returns to its initial launch point. Which one of the following graphs could represent the velocity of the object as a function of time during its fliy85xt7 c 49haldedvl0ght?

  14.03: An object is dropped into free fall. Through how many meters does the st.np8 bxx(; . tl50u9tl1w,r f xzqmrobject fall during the fir lqt;u. r x.s8 pl( x9x5ztn01wfbrt,mst 3.00 seconds of flight?

  15.02: A box uniformly slides 7.50 m to rest across a flat surfals) ierfpq3 6j8xw5b0 d: jxi4ce in a time of 12.0 s. Whax85x :0 dsijp jqebwi6 )4rl3ft was the initial speed of the box when it started its slide?

  14.07: Starting from rest, a c1yu (nwldt6xt az 8(g-art uniformly accelerates to a speed of 7.60 m/s in a time of 3y -8g6 luz( ntwtdax1(.00 s. Through what distance does the cart move in this time?

  14.16: A toy car initially moves to the ri0-kj w+uqo63 hl cl/ w,w3mbjrqi ae8:ght 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. Whichw3k/ -l,cj8w3j qe+ 0ilqb:muoh6wra 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 right at 60.0 cm/s. Five secoj2ixmzteug-d;oh5/ so6 e1y ,nds 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 represend2e6jmtuzoh i1sx/e 5o;, gy-ts the magnitude of the average acceleration of the car during the five second motion?

  14.33: An object moves with constant acceleration startcz+)ps3.da oogaz 7 9qing 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 fr1/n/ x w z+lfd(vv2tl 7tmen:8gm f/zsee fall. Which one of the following choices best represents the direction of the object’s acceleration during its fli :znlt8dn /(7mwvxs1fme vf /l+/gt2zght?

  13.26: An object moving only to the right complyib* 58wr vysx.afe: b3++h- wx/bkacetes 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 constant.:bh svyc 5wyx+axb/w3-k fr i8+*bea acceleration must the object have during the 8.0 seconds of stage II?

  15.32: An object moving along a line com3 w i 8r.vhrxa*f*5zvepletes a 20.0 second trip with an averag5rxv.a* z i er38w*fhve 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 left must the object have during the 8.0 seconds of stage 2?

  13.33: At the top of a high cmu,x*m;czusu 4 )r wojnv409 vliff, 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 the speed u)o n9zrxwu0v ,j*v4cm4m;us of the ball relative to the rock?

  16.36: On a straight road, a self-driving car races with a ro ,h,y c yeirl.s91vv2mbot. The robot acceler 2i1 v sryy,mlev9hc,.ates 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 position of the ball ztahs*-:swqgm ui / 3;bzf-u9c*5 uqr0.70 s after release is thu-5-usgz9 mb:rhuqasc/3*;f * w qzite 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?