94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and object 2 ue4ph :mqdzb g5g*1)ofalls freely for 8.0 so eqbzphmu4g5 )d: 1*geconds. Compared to object 1, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to a cgnuz 9c-:mj /final speed of 20.0 m/s in ac-n uj9:/czmg time of 15.0 s. How far does the car travel during this time?

  94.03: A ball is thrown off a high cliff with no horizontal velocity. It lands k)v +mbm1zg-7 b)dk xa6.0 s later witz bm-ak kbgd1xv) 7m+)h a velocity of 40 m/s. What was the initial velocity of the ball?

  95.27: A rocket near the6wu9;e) a ckjo g(ub;k surface of the earth is accelerating vertically upward cagwukeku 9ojb;)6;(at $10\;m/s^2$. The rocket releases an instrument package. Immediately after release the acceleration of the instrument package is:

  95.13: A freely falling bodtjc)s tv ari3z7.:xu )8qked/y is found to be moving downwards at 27 m/s at one instant. If it continues to fall, one second lat3 auxqvkc8 s)rd/. i7)e:ztjter the object would be moving with a downward velocity closest to:

  95.39: A car starts from resp 32qbvnyr3+3o krdo;t 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 droppexzqw8 , hm4(a3d(cci id from the top of a building strikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of th,8q(3mcw(iac4 dzx i he building is approximately:

  97.09: At a certain time, an object in free ,d*ydey2sw + bv q6,xbfall has velocity 4.0 m/s in the upward direction. What is the approximate velocity of the object one second e d ,+yyv6wdb2q,s *xblater?

  98.14: How long must -:p+jdy wt2/ivmzvgn 3pu2+ugi l/amc4 o7 :ra $2.5\;m/s^2$ acceleration act to change the velocity of a 2.0 kg object by 3.0 m/s?

  98.15: A freely fallimosa8s)mv0 3/dz;ln tf kz/) gng object is found to be moving downward at 18 m/s. If it continues to fall, two ss mtzn/zg0)3mso / ;k8)vdalf econds later the object would be moving with a speed of

  17.02: A small object is released from rest :2qkjvzqq 7zl ;ml3d/and falls freely for 4.00 s until reaching the ground. What was t z / dlj;qq:qz732lmvkhe 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 xhmh i/6ck9b 4it rises to a maximum hh49/b6khm xci eight 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 straight upward xw *x/hn.6wcvso that it rises to a maximum height of 12.0 m above the launch point. Ignore air resistance. Approximately/wxxvcwnh *6. 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 tw 7,g4h9hruo fao seconds after it begins to slide. Approximately how far does it trave hg,hofuar74 9l in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m tower withd,h)7sw dfo1z8v-nj*x l8 qoy a speed of 15 m/s. Coin II is dropped (zero initial sld*yj,vxnwz8 qs d)1oh fo- 78peed) 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 speed of 2iic52yxd 5*vh. ++s fatru2e /dgk pzanother, h5 t.2s2gp/d xra cy *zhdeki+vfi+5u2ow much higher will it be at its apex?

  02.30: A box falls to the gm;*p7en xcdo:round from a delivery truck traveling at 30 m/s. After hitting the road, it slides 45 meters to rest. How long does it ta 7pdcon: ;*emxke the box to come to rest?

  03.29: An object is thrown upwards with a velocity of 30 m/s nea d5qj;bi9qny /d:d y7cu3.qrnr the surface of the earth. After two seconds what would be the direction of the di/i d;rqbqu5c7yjddqn.:3 n 9ysplacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of diffee6 l5gc7n0u+*su qsgk rent mass (1m, 2m& 3m) are thrown vertically upward with different velocitiuuce skg*l57s+ nq 0g6es (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 .5lddc14cr uf launched straight upward with identical linear momentum. Object 1 has mass M and reaches a maximum height H above the launch point. If ob5 rc.d1fu c4dlject 2 has 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 bounce, 9m5 h9wyon-msws /2+ qad ll+sthe ball reaches one-hall++s/9mwn-ds lmywo5 q sh2a 9f 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 launch, a projecti88l wwfry :)wso.g;5 -a urzerle in free fall achieved its minimum speed during flight. If that minimum speed was 15.0 m/s, what was the projectile’s initial angle of launch from th-z:eyw;ulr fw)5wosrr .88a g e horizontal?

  05.02: A pebble is dropped from a high vertical cliff. T 91i v/ dyewaiwf gd-nfml((:(he collision of the pebble with the ground below is seen 1.50 seconds after the pebble is dropped. With whadlde w 1m((i(:g yvi f/wf9na-t speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about the height of a parking garage. On4m :dy. ke;hfke 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 f4:y.ekk ;mdh to fall was 1.4 seconds, approximately how tall is the parking garage?

  05.07: A snail is moving along a straigh,p9o od +m:l9qytl*u yt line. Its initial position is x0 = -5 meters and it is moving away from the origin and slowing down. In this * ulml+opyod99q:,y tcoordinate system, the signs of the initial position, initial velocity and acceleration, respectively, are

  04.38: A small point-like obje v/:c2h; 81wuinetbulct is 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 longe nl1i2 8utue hcbv;/w:st 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 towq sa4kux+5j8cpy b; 6vwn19 vwer. Half a second later another rock, twice as massive as the first, is dropped. Ignoring air resistancwn5ya8jpv +kc14;6 uxbqsw9v e,

  06.18: A cart is initially moving atwibtyr6b/ n(t6g1 x l1 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 ib6t(t1nl x1/yb r6w gthe 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,k 1-pbyk2ssn . The cart comes to rest after traveling 1 m. The experiment is repeated on the sam-kb2nks1 p, yse 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 runsigyg1 +i ol3n06 rfrr2 in a straight line with a constant acceleration of 22rr1o0g yni6g rli3f+$.5\;m/s^2$. 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 fwlkx o10)4qk4zxng 9m rom a height h above the gwon)g0l 14 qkx9k4xzmround. 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 bothqf;hh2hc(t7i 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 qh 7ich(htf2; by Object 1?

  12.26: An object is thrown horizontally with speevuv5+ w3t d3ild 10.0 m/s from a height H above the ground. The object r3t livvdw35u+eaches 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 free fall untvwk62d z)apxw7;peq /zh :3rtj x 2d-fil it returns to its initial launch point. Which one of the following graphs could represent the velocity of the object as a functi- t: ak ;zpd 72pwxz qrfh3d)/e2wvjx6on of time during its flight?

  14.03: An object is dropi5/umob6r( i)8b x5xf k -b-eohscx+yped into free fall. Through how many meters does the object fall durbeyoik (x--fisxob mc8 x5u 65)hr/ +bing the first 3.00 seconds of flight?

  15.02: A box uniformly slides 7.50 m to rest across a flat surface in a time +eq zya-x vm3xvif./1of 12.0 s. What was the initial speed of the box when it starm.+x3qxz-vf1 v ayei/ ted its slide?

  14.07: Starting from rest, a cap5b+fa7 0cjox3nqcn*) cva1art uniformly accelerates to a speed of 7.60 m/s in a time of 3.00 s. Through what disn7pc a*oa) vj xn+5c3aqbcf01 tance does the cart move in this time?

  14.16: A toy car initially moves to the rp(um zawet,fmy.r -vji. 3 99fight 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 repretfau..z y9w-evm i(93pj mf,rsents 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.e4/4uwxuc:cwg fbmk03 x s95l Five seconds later, the car i f gxs3xebw45wk0uu49lmc:/ cs 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 motion?

  14.33: An object moves with constant acceleration starting w.t:xnpdsax csum2 76 y6+g:wwx-(f lgith 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. W6 zf/arh3bs9 * 2zeuh3:9dhn/ds xuu hhich one of the following choices b: /hnz9/ d93he6fusu3zsu *ahx2rhdbest represents the direction of the object’s acceleration during its flight?

  13.26: An object moving ontwpf33j.g gl*v g++uln 9yd8 ily to the right completes a 20.0 second trip in two stages, I and II. The average speed of the entire trip is 10.0 m/s. Fo3nl+jg .3lgp +*dtuf8w i9yg vr 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 c46ief-n eeo+4h osvek7ni,3vompletes 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 foe ii3f-,e4nsv noe +ko he746vr 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 higp9k:e +3xgboq) 1ej7n5tlzosh cliff, 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. Whenpq1: et) sk9xb5o 3gojl7z+en 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 selc c-u,onz9p w4y nk89gf-driving car races with a robot. The robot acce,zgyu4cp8k - cn9ow9nlerates 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 posi; yh(.nckd-*n w5 6egtp no(bdtion 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-hagy5nbn ewp .od (*(6;dtc- hknlf of the maximum height it obtains during its flight?