94.01: Starting from rest, object 1t v8 l7ipfm+;w falls freely for 4.0 seconds, and object 2 fal w7;+mlp iftv8ls freely for 8.0 seconds. Compared to object 1, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to a final spext*,7v t/pij w axv0d0ed of 20.0 m/s in a time of 15.0 s. vt ivwt*p/j0,x7ax d 0How far does the car travel during this time?

  94.03: A ball is thrown off a high cliff with no horizontal velocity. It land-t m9vh cljfg(jnv8/)/8o cehs 6.0 s later with a velocity of 40 m/s. h mj8v(9- f gconlvjhe) t/c8/What was the initial velocity of the ball?

  95.27: A rocket near the surface of the earth is accelerating85gfvqp9vxg5 vertically upward ap5 8vfqx59gvg 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 fallinwrxb.l isg-;0 +r *b w6i/ltrs v: itsab26z0qg body is found to be moving downwards at 27 m/s at one instant. If it continues to fall, one secowit w6b; bir.q-6: l0sr r+i2bga sls/*t vx0znd later the object would be moving with a downward velocity closest to:

  95.39: A car starts from rest and accelerates at o 4+ 2lw 54un0iv4ckthuvg g4z$0.80\;m/s^2$ 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 d7i3rf9 v79guw/wsbz7xk; liwp (4 dfj ropped from the top of a building strikes the ground with a speed of 30 m/s. Assume air resistance canlrpf7/ d9uszgxi ;b w 47w37i w9f(kjv be ignored. The height of the building is approximately:

  97.09: At a certain time, an object in free fall has velocity8n fj72 s u/dhwejn;plsc0d;* 4.0 m/s in the upward direction. What is the approximate velocity of thj/nj2; ;* scfp07hd ne8uwlds e object one second later?

  98.14: How long must a w ivc,jx,2(jx $2.5\;m/s^2$ acceleration act to change the velocity of a 2.0 kg object by 3.0 m/s?

  98.15: A freely falling object is .-*dqh 2 j uo8l7cjrcmfound to be moving downward at 18 m/s. If it continues to fall, two seconds later the object d7ruhc -cj.qo28l mj*would be moving with a speed of

  17.02: A small object is ru2k utiz g1g2(ea2w0peleased from rest and falls freely for 4.00 s until reaching the groua2pzk0 twueg(g 12i2 und. 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 2d4j d8bsb s/ pa6 5:ia l*yhwy2qrx(crises to a maximum height of 12 4 *y28sji6a2rx/sq(bld5dw pb ahy:c .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 launcheasa j eag/*)vk+75io: kkfv7rd straight upward so that it rises to a maximum height ofask:k*jgv + vaoar i7k75 e)/f 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 launch?

  98.31: An object sliding down an inclined plane has speed 0.40 m/s two sf:t5+3beha03qglq pxy. ;wpweconds after it begins to slide. Approximately how far does it l x0tbew; y.pq5:3h a+ 3wfpgqtravel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m tower with a speed ofy5-kbnwl+sfy65 a6b m 15 m/s. Coin II is dropped (zero initial speed) from the top of the tower 2.0 s later. Assusbn 5wb fk m6y65-lay+me 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 ihsh/nc,o) q,directly upwards with twice the initial speed of another, how much higher will it be atqnoi,) hs/,ch its apex?

  02.30: A box falls to the ground frdu 1i 2d98z1krs/t cyjom 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 restk/8ucjrtys dz9112i d?

  03.29: An object is thrown upwards with a velou2)y6p;f r 2 plpty4m:8 lgzxkcity of 30 m/s near the surface of the earth. After two seconds what would be the direction of the displacement, velocity and acceleral6r:;m2p2 ypfx l8kp)z4uytg tion?
displacement velocity acceleration

  04.10: Three stones of p.n,ta8 ,ox :emtsd3idifferent mass (1m, 2m& 3m) are thrown vertically upward with different velocities (1v, 2v& 3v respectively). The diagram indicates the mass and,:am ni8e3poxd. ts t, 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 i3y-;8qjsp rvyq+( 5suy. , +q nfsmvlzdentical 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 mul-+3 my zsy+5 ;n(r 8s.pfvj,sqq vyqaximum attained height above the launch point in terms of H ?

  04.28: A rubber ball bounces on 5tmypvhc8- (ml vsq 6lq vfb (05+njrp27j3f sthe 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 air between the first and second bounce was 1 secondpvj 8vmslhj+f2bsf0 5-tlpy7 cr3(qn q m5(v6 , 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 its minimum gr: lfo 6foy7y5. ,pewspeed during flight. If that minimum speed was 15.0 m/s, what was the projectile’s ilf:o5.y ,peyfw7rgo 6nitial angle of launch from the horizontal?

  05.02: A pebble is dropped from a high vertical cliff. The collision of tas7jf.qwo w ,,qmdf7 04lc7hihe pebble with the ground below is seen 1.50 seconds after the pebble is dropped.cqq ,al4 wfowsmhj7i.f 7,0d 7 With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about the )8sq. khn9nnvheight of a parking garage. One student suggested that to determine the height 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 )vnnqnh9ks. 8 the parking garage?

  05.07: A snail is moving along a straight line. Its l:-f,o,rpl7obhg y ;ninitial position is x0 = -5 meterln,r p o -yf:ghb7l,;os 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 pulledenw. r+yn 2f(z 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 negligible tefy(nnwr+ 2 z.ime.

  06.13: A rock is dropped from thr1 lzz)z rq:vf h8(q8 jq.h3v)xf)ydqe top of a tall tower. Half a second later another rock, twice as massive as the first, is drohd3)q)rv1z8(fxlj q hr:z 8 z.fy) qvqpped. Ignoring air resistance,

  06.18: A cart is ini8amsut0,dn9 r tially moving 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 cartmt9nd asu8r,0 travel before coming to rest?

  07.11: A cart is initially moving atjw: l4f8jv bdu7 ;h2:wg;oxfz 0.5 m/s along a track. The cart comes to rest after traveling 1 m. The experiment is repew:j 8z4wvo 2lh:f;7jxg;ubd fated 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 constant acc eh/vzc7j5gep . ( iugbp;-y:lelera /(-5z ehggl.u; :7peivycjpb tion 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 initially at rest falls without air resistanoql4mfuqj 5 7,0r1 wycce from a height h above the ground. If the ball falls the first d0j7f15l mwqy,o c qru4istance 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 tbtv o8.1 t bhstv+dy7ev hv3(5he 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(+3tevv1 7sbt8.5vh todvybh 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 wixnnt eztu3x,/k390 se th speed 10.0 m/s from a height H above the ground. The object reaches the ground with a speed of 20.0 m/ss e3 3z t0,9kx/tnxuen. 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 t1 90dxbq(h/ts -ujkljhrown straight upward. The object remains in free fall until it returns to its initial launch point. Wh- ld xj 0jt9(bqsku/h1ich 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 droppe rra md*a vfi-0/0sci*d into free fall. Through how many meters does the object fall during the first 3c* rdfa -ri 0m0*savi/.00 seconds of flight?

  15.02: A box uniformly slides 7.50 m (9wz0vd6e rie2 ev6ey+od zlj8 )xf(yto rest across a flat surface in a time of 12.0 s. What was the initial speed of the box when it started its slide wedvv 2zji+) e fd69l6z(oeexyr8y 0(?

  14.07: Starting from rest, ah s*mvt8yt78gw;v a )p8(wlql cart uniformly accelerates to a speed of 7.60 m/s in a time of 3.00 s. Through;gas ltm )tlq*w78 8 w(py8hvv what distance does the cart move in this time?

  14.16: A toy car initially moves to the ri3 tqh-f )(bt:hwrdt x:(hme7pfw*k .nght at 60.0 cm/s. Five seconds later, the car is moving at 40.0 cm/s to the left. The total dispm*w r:( h7kqh:pw-.3xefbt( thd)fn t lacement 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 motion?

  14.17: A toy car initially moh 8qk:/r5 bnxbves to the right at 60.0 cm/s. Five seconds later, the car is moving at rb n/:bk xhq5840.0 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 move/z6bf .1mm et)ils(w ts with constant acceleration 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 initially is moving upwaq tv.w rc98z+zrd while in free fall. Which one of the following choices best represents the direction of w+z8z. r tcv9qthe object’s acceleration during its flight?

  13.26: An object moving only to the right complwa92bbah.o,(ymql j + etes a 20.0 second trip in two stages, I and II. The average speed of the en mwbqbl+2h9 aayoj. (,tire 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 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 tripx5cii8 dlp ds1a4 yh,2s1vdv9v3l st) 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 accpvxltcs,d dd158sa3v 1i92vy)ilh s4eleration 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 re: 6a 3wiii6hwj(roc* l:m,dakbyset 2 m(q.t:st. A ball is launched straight downward with an initial speed of 36 m/s at a time 2.16 qcj o: w3 d((hmbl .aeskt:6tayrmi,*i: i2w0 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 relative to the rock?

  16.36: On a straightflb-+.rsvsux 8g 3nd 0 road, a self-driving car races with a robot. The robot accelerates at v8ls ng0 rxbdf.+s-3u$8.50\;m/s^2$ 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 bae,ilgmv01- i tll 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 veltm- g0i1i,vertical position that is one-half of the maximum height it obtains during its flight?