94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and ob6+xj r+g*kf0vre rw0j ject 2 falls freely for 8.0 seconds. Compared to object 1, object 2 falxr e gjj6w*0+fk0rr +vls:

  94.02: A car starts from rest and uniformly accelerates to a*1xun scxj4 h;cc *1fh/nn(aa final speed of 20.0 m/s in a time of 15a/ ;1nn jcs*f u1hac*hxnc(4x.0 s. How far does the car travel during this time?

  94.03: A ball is thrown off a high cliff with no horizontm5ioqzt/t3c.i)q i 0val velocity. It lands 6.0 s later with a velocity of 40 m/s. Wha.mz q 0i )ticovqt53/it was the initial velocity of the ball?

  95.27: A rocket near the surface of c-bv z-s; 7ma3ldq jc0the earth is accelerating vertically upward at v sq -7ac 0c;bjd-l3mz$10\;m/s^2$. 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 mop5w5 l:4 e-q; hrdtgwlving 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 cgd rhw;qt5ew5:ll4p -losest to:

  95.39: A car starts from rest and accer0h, z h 0+qwdyn 2 vgk,kg*2zd,f)5mizct a.flerates 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 aoum15tc 4-o( mftlk dk:1fx)c building strikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of11otk -m5(xkml) 4c:cduoft f the building is approximately:

  97.09: At a certain time, an object in free s0 p8pd1pu 1bpfall has velocity 4.0 m/s in the upward direction. What is the approximate velpsdpu 01 pbp18ocity of the object one second later?

  98.14: How long mustfn6)e1 13h 0fueugsbp 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 falling object is found to be moving downward at 18 m/s. Inp/ l u5kk,nnkp5ym-,f it continue pny 5kklkn,-5un ,mp/s to fall, two seconds later the object would be moving with a speed of

  17.02: A small object is released from rest and fa ey1)8w pa jf87 u;ft.ytfx4n5(us yq:h4ooublls freely for 4.00 s until reaching the ground. What was the height above the ground from which the object was r:f u;8uteuwo4xs t7ah(jy 8b.4qpn o1fy )y5feleased?

  11.06: A ball of mass =0.100 kg is launched straight upwarr vc1mrl26al )d so that it rises to a maximum 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 neml ac1)6 lr2rvt force acting on the ball?
D 10.0 N
E 12.0 N

  11.07: A ball of mass =0.100 km, 1g0(kqe dhsg is launched straight upward 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 th0dhegqm(sk1 , e ball to reach the maximum height from its launch?

  98.31: An object sliding down an inclined plane has speed 0.40 m/s twoqfo i6 u28 g.f3j kp8f69g ):mqzohkkf seconds after it begins to slide. Approximately how far does i2)okf k9:hg 8pq i68mujfq6o kf. z3gft travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-mku6 13 qxjkui) tower with a speed of 15 m/s. Coin uukj 31i k6q)xII is dropped (zero initial speed) from the top of 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 directly upwards with twice the initial shvdh /9s, cedt3v14akpeed of anoth31h ,ksedvh9cd/v4a ter, how much higher will it be at its apex?

  02.30: A box falls to the gr8e n66v.o2-6sj 4u nc jbmebigound from a delivery truck traveling at 30 m/s. After hitti nbjc62m -4eobug.e8i6jv6 snng the road, it slides 45 meters to rest. How long does it take the box to come to rest?

  03.29: An object is thrown upwards with a velc2sxj 4( qbjebmx, g76ocity of 30 m/s near the surface of the earth. After two seconds what4gj,s6x(2e jcb b7qxm would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m,r:1o2mur0ziiqjj4c 1 2m& 3m) are thrown vertically upward with different velocities (1v, 2v& 3v respectively). The diagr1ri 4z oi 20uqm:cjj1ram 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 line owfx(28eozxr o5:jsq u((2qb ar momentum. Object 1 has mass M and reaches a maximum height H above the launch point. If object 2 haej8qrxfqow(5 : 2u(obx (so2z s 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 bol5;b7l 2prm 4x2rhwneunce, the ball reaches one-half the height of the bounce before it. If the time the ball was in the air b bx7m 2;n5rrepwhll24etween 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 projectileqy wp l-0)fc h0paz-j6et,s4p8 ymb1d in free fall achieved its minimum speed during flight. If that minimum speed was 15.0 m/s, what was the proj6dtp,01 hb8- fyz4pcpesl )y -a0 jwqmectile’s initial angle of launch from the horizontal?

  05.02: A pebble is dropped from a high vertical cliff. The oz.)21xutw rm be03wd dbr5w,collision of the pebble with the ground )10wdr d e,.o2b3mwu5wtxz rb below is 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 fcsrn8)0n d7ovn( ll,were arguing about the height of a parking garage. One student suggested that to determine the height of the garagn7v r8lon ) l0fd(scn,e, 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 +4fd cxcmq:7nf4eiwk9 (;lss . Its initial position is x0 = -5 meters and it is moving away from the origin and slowing down. In this coordinate system, the signs of the initialifsslwq7 fkc4d(e+c; :9n4mx position, initial velocity and acceleration, respectively, are

  04.38: A small point-like object is pulled downoo m- km1wc7kn3a1 a7) y(6xlc92wnnofm1it awards by gravity (down the plane of the page) but is constrained to exactly follow each of the frictionlekmk 76 )y71nn-ofxac w2womm ln9ai(t3 1c1aoss 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 time.

  06.13: A rock is dropped from the top of a tall tow17- ct7 2yoie;rckni ber. Half a second later another rock, twice as massive as1- tci 7 2bnyr7ieo;ck the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s alongcu4 9hv fdiq1o-v1gzi(r2 lu; 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 rfgr-i1 uqcz( 1;ulv 9i42dhovest?

  07.11: A cart is initially moving at 0.5 m/s a/wxi;ztn y/,qgc j87.: akpj jlong a track. The cart comes to rest after traveling 1 m. The experiment .nyj ixp;a,gcwjjt// 7k:z8q 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 withnb7c -tkgzxg 83du(4f a constant accele u k-g3xgb4c8nzfd t(7ration 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 resistance from a height 754e:sixabo j7 qho:t h above the grounx74:o e7tjq s :b5ahiod. 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 andc 2kt1k sjc/*f 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 objc1c /*fkjkts2ects 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 heigh40b m/0d eiu)rrb-lu/k8lcg)jx+ vywt 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 fligev+8cl/)xw- dbi/u r)rjyk g4m 0u0blht to the ground? Ignore air resistance.

  13.10: An object is thrown straight upward. The object remains injo6qd o)mg-3 h free fall until it returns to its initial launch point.qh3-g) doj m6o Which 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 dropped into free fall. Through how many meters 8+8 i lgz7*ht)nih 8jdikr ix2does the objec*it h8+)d2 z n gr8hixkli87jit fall during the first 3.00 seconds of flight?

  15.02: A box uniformly slides 7.50 m to rest across a flat s:eku bigzb(f 4q l9o24i)1)a s)vzx rpurface in a time of 12.0 s4ki:s)iz a 4)21g vef(ou)bb9 zxprql. What was the initial speed of the box when it started its slide?

  14.07: Starting from rest, a cart uniformly accelerates te2xudj-8*ht,f/wcx f1;xs k zo a speed of 7.60 m/s ifz,txsef1* k 8 j2hxu/c dw;-xn a time of 3.00 s. Through what distance does the cart move in this time?

  14.16: A toy car initially moves to the right at 60.0 cm/s. Five secondo; *rsfm-s*wo 3ray)o s 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 o ow)ms3;sya -*r orf*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 secondqs rjj.(co9 i(s later, the car is moving at 40.0 cm/s to the left. The qi(r.9co sjj( 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 constan hn3v h7x3oe+nt 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 upward while in free fall. t -f2; h2( u;bme0eng o*jrnhmWhich one of the following choices best represents the direction of the object’s ach-n2*jebg me(rm2 uth 0;on;fceleration during its flight?

  13.26: An object moving only e .qgb kds +2ths51s7/ye9 bwrto the right completes a 20.0 second trip in two stages, I and II. The average speed of y27 e5s+1ke q/h.s9brtw dgsbthe 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 acceleration must the object have during the 8.0 seconds of stage II?

  15.32: An object moving alob2ez/u67n,f e* esd vjng 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 to the right for 12.0 seconds. What constant magnitude acceleration directed to the left muste6evds,nze/fu7 b j *2 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 froq7s55myr6ul+xcgvs 2m 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 is5xc+svr 2l gmqu56ys 7 the speed of the ball relative to the rock?

  16.36: On a straight road, g0sjoy7tc en3b7i 90la self-driving car races with a robot. The robot accelerates 0snc790tbi3 l jyoe 7gat $8.50\;m/s^2$ 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 bzz jhqtxz 09:mr -dimd9 7;jdlq/-2wmall 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 dm-;7dwrh t x0mzqj9ml/z :j- 29zqid vertical position that is one-half of the maximum height it obtains during its flight?