94.01: Starting from rest, object 1 falls frx+lk m obd4z,+o h(1l p5s4kureely for 4.0 seconds, and object 2 falls freeu b+4kod 4lpmxk1l+,rz 5(o shly for 8.0 seconds. Compared to object 1, object 2 falls:

  94.02: A car starts fz4 jlyltsm2q xq:+280 novo;g rom rest and uniformly accelerates to a final speed of 20.0 m/s in a time of 15.0 s. How far do yjzoqg+t; so20q4 8: nlxmv2les the car travel during this time?

  94.03: A ball is thrown off a high cliff with no horizontebqq;:bd4q3bo5h4 qx al velocity. It lands 6.0 s bq qd obx 4q3;:qbe45hlater with a velocity of 40 m/s. What was the initial velocity of the ball?

  95.27: A rocket near the surface of the earth is accelerating u0 z20iisyr /tfgt-8kvertically upward ati0 zyut-is/ 82kgrtf0 $10\;m/s^2$. 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 u+xxsst2pt* +z t y/.pdownwards at 27 m/s at one instant. If it continues to fall, one second later the object would be moving with a downward velocity clos zux2+/t + pt*.ysxptsest to:

  95.39: A car starts from rest and a e0bkwy(dp v8q03akzvy781 b xccelerates 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 bu + msossbwf b/5txv09:ilding strikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of the building is approximat9vmso +b:tw 0 bsx5s/fely:

  97.09: At a certain time, an object in free fall has velocity 4.0 m/s in the upw: pitbn8 geg71xp(ax 7ard direction. What is the approximate velocityxgp 1b: gpatx8n7( ei7 of the object one second later?

  98.14: How long must a yl xb47bfoskym:)v/: fw jp4+glm+w /$2.5\;m/s^2$ 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 18 m/s. If iej00tymdc1.a 8 nak 2xt continues to fall, two seconds later the object wo12 da.ta8 ec myx00kjnuld be moving with a speed of

  17.02: A small object is released from rest and falls freely for 4.0eklh(, z5 0tzt0 s until reaching the ground. What was the height aboveek z,(5lt0thz 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 6j vbg(m o 3 tq)e d-4rynrfk.;6hn1kyto a maximum height of 12.0 m above the launch point. Ibo.kn6 4) q3(rv-e ytkym6fn grh1; djgnore 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 =0.1r z/v h 41x7x4g)*nipvsttvi wlv/,h* 00 kg is launched straight upward so that it rises to a maximum height of 12.0 m above the launch point.v* /ghx)r,vln*xt47iwht zvi /14spv 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 seconds alhqgi-u5 elxw.qcz4v: )o) y 6s+:e(lc wm+ytfter it begins to slide. Approximately how le+ mi(s) 4 eolh6)z 5ycq+:wu.- ycvwt gqlx:far does it travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m tower witf6tlan/k 0* bsi9a e,xh a speed of 15 m/s. Coin II is dropped (zero initial speed) from the top of the tower 2.0 s later. Assbt a*s an/06 ,9ifxeklume 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 sj+7)aa9 vscg gpeed of another, how much s97 a)jc+ aggvhigher will it be at its apex?

  02.30: A box falls to the ground fromso5w;5d*hz . dvozz 9p a delivery truck traveling at 30 m/s. After hitting the road, it slides 45 meters to rest. How long does it take the box to come to resh9. o 5zdwo;psd vzz5*t?

  03.29: An object is thrown up8 fqefjtu5z;jsh;m+ 6wards with a velocity of 30 m/s near the surface of the earth. After two seconds what would be the ;5th 6je+8m zfj sf;uqdirection of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3m) ac+)tbdn y2 (a; 3r7 y/zal7nmkw,iognq+zuv,re thrown vertically upward with different velocities (1v, 2v& 3v respectively). The diagby+t nz 7ocn+d rv/n7a2 mu;kq )a3(y gz,,iwlram 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 linear mouy7o, hn1 (ibc 7kkbs*mentum. 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 ao ,(i7h*bbsc71ky nukbove the launch point in terms of H ?

  04.28: A rubber ball . +p6.hoprq yq,jc 8vxbounces on the ground 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 ahvc8+yq6xj prp. o.,q ir 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 ach;.i6mg en ,r)(cfj/yx ql16rhd1yzusieved its minimum speed during flight. If that minimum speed was 15.0 m/s, what was the projectile’s initial angle rcn/i lhgm.( 6ed sq rz1fj,1x; 6)uyyof launch from the horizontal?

  05.02: A pebble is dropped from a high vertical cliff. The coll 4 lp-fv5gegg)ision of the pebble with the ground below is seen 1.50 seconds after the pebble is dropped. With what speed did the pebble hit the ground? Ignore a4ef5)gg v g-plir resistance.

  06.03: Three students were arguing about r-lip 311.i evpkun:vthe height of a parking garage. One student suggested that to determine the height of the garage, they simply had to drop tennis balls from th- pvvp3. ik:ue1ir nl1e 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 st/ x/vrl*6 fjgdraight line. Its initial position is x0 = -5 meterv/6* rd/xf ljgs 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 iws5a1ls np z7*s 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 takes negligi slzs15*nwa7 pble time.

  06.13: A rock is dropped from the top of a tall tower. Half a second lv83 4vlwxvml 7ater another rl8mvw 7v4lv 3xock, twice 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. T+b jm6q2:9reejj n - jg5v)s a9owl4ighe cart comes to rest after trav4ma sjwgr +) 95j9jeol6 gj-v2i:b eqneling 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 along a track. The cart c8)tw1tnv fiunbps 7-8. qi/hwm3qz-t omes to rest after traveling 1 m. The experiment is repeated on the same track, but now the w)n- mb.n zws-i8iut qh3q8p/1v7ttfcart 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 constan0qcqid hr;;-d7qur8 et acceleration ocdh;i-q;0qrq 78 r eduf 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 withbacbf.y21 ))crn7 t q saq4/dv vtv2o9out air resistance from a height h above the ground. If the ball fq4as vd2tc ytqobbac )/1 v 2r.n9f7)valls 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 ti0*8z 9yvke(a zco2p edme 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 ez2azc (*vkyd0e89op 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 horizontally with speed 10.0 m/s from a q)9 3bu.d1*lwql+2y swk y pvzheight H above the ground. Thw* 2) 1zqd9lpy3k.q vls+buw ye 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 thrown straight upward. The objectnu:cd z3hyq 9,x fo78ti p.)my remains in free fall until it returns to its initial launch point. Which one of the following graphs coxctp 3:q.no, i)d zfuy7y8mh9 uld 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 many meters**gv fc79z9om ypkc-q does the object fall during the first 3.00 seconds cqc mokz -97*vy* p9gfof flight?

  15.02: A box uniformly slqy -scybx h-2,-e+otyides 7.50 m to rest across a flat surface in a time of 12.0 s. What was the initial speed of the box when it started itshx-qb + cyoy-s- y2t,e slide?

  14.07: Starting from rest, a cart uniformly accelerates to a speed of 7.6 75ciq2 c0k k 8ymgn-moxlf59d0 m/s in a time of 3.00 s. Through whaf2okci l 5m k5-9gyd8ncx07mq t distance does the cart move in this time?

  14.16: A toy car initially moves to the right at 60.0 cm/s. Five second.n3y50 i(mboobi/dm is later, the car is moving at 40.0 cm/s to the left. The total displacement oi.yibm m0n( ioo5d/3 bf 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 motion?

  14.17: A toy car initially moves to the ri1:yd tm5zv3 rs m79varght 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 v519s3varrmdmtz: y7 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 str fl5qwsf0 b 4.dzqs1(arting 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 one ofsn7ed7a; s7ooh)fv p, the following choices best represents the o;a po)h7e s7,nsdv7 fdirection of the object’s acceleration during its flight?

  13.26: An object moving only to the right completes a 20.a4gs3p:vbc4lmj2 b78kc j7 v j0 second trip in two stages, I and II. The average speed of the entire trip is 10.0 m/s. For stage I, the objejva 4j42b8lpsbj3 vcc :km77g ct moves with a constant velocity 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 moving along a line completes a 20.0 second txe4y( z e(bf4cfpa.e 0)lepk6 rip 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. What constant magnitude acceleration directed to the left must(e4yb px aek 0 )l.e4f(fezcp6 the object have during the 8.0 seconds of stage 2?

  13.33: At the top of a high cliff, a smaz;0v;emfpvj*1hf ww . ll 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 of the ball ref0 e w;z.h 1fmpvvjw*;lative to the rock?

  16.36: On a straight road, a self-d-p r7 44kkt) onaypd,driving car races with a robot. The robot acceler-7dy t 4)rok4na dp,kpates 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 posit:q* /m4qwsaqfion 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 at a vertical position that is one-half of the maximum height it obtainf qs*wamqq/ 4:s during its flight?