94.01: Starting from rest, objerhd-:2l xnrv, ct 1 falls freely for 4.0 seconds, and object 2 falls freely for 8.0 seconds. Compa2-,r: lx rvndhred to object 1, object 2 falls:

  94.02: A car starts from rest and unif 2;dm /arsbf)hnb:y5mormly accelerates to a final speed of 20.0 m/s in a time of 15.0 s. fbhb sm 2dm;y/5ran):How far does the car travel during this time?

  94.03: A ball is thrown w)tus5. uyg *svl* .:r)jgcth off a high cliff with no horizontal velocity. It lands 6.0 s later with a velocity of 40 m/s. What was the initial velocg*u)5g tw ..jhs:ru*s)lc vyt ity of the ball?

  95.27: A rocket near the8/sbizpx a/+4 ,hzkvf surface of the earth is accelerating vertically upward at aph/+k fbi 8v,zs/z4x$10\;m/s^2$. 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 mv w2q;o 77 kmd;7d 6xhz9ayjs;xbjn) loving downwards at 27 m/s at one instant. I7k;7h vz wo2bdjx;sxm7l9)qn d;6ajy f it continues to fall, one second later the object would be moving with a downward velocity closest to:

  95.39: A car starts from rcz1 b245x svwwest 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 from the top of a building strikes the ground wypkxwxbi8 **c 1r7st ,ith a speed of 30 m/s. 7t rb*xws*cp x i18yk,Assume air resistance can be ignored. The height of the building is approximately:

  97.09: At a certain time, an object in free fall has veloc x vc8*xwb.dh;ity 4.0 m/s in the upward direction. What is the apprvwxhcx*.b d8 ;oximate velocity of the object one second later?

  98.14: How long must a v 1 df;wk icbt92lpgmtrk.h9l (2eks5/s8 u/ i$2.5\;m/s^2$ acceleration act to change the velocity of a 2.0 kg object by 3.0 m/s?

  98.15: A freely fall-v1fj;yegj -(j d7fer ing object is found to be moving downward at 18 m/s. If it continur-eyf-;jv 1(7e jdjfges to fall, two seconds later the object would be moving with a speed of

  17.02: A small object is released from-q f7mq 8u bj1i,bm-qm rest and falls freely for 4.00 s until reaching the ground. What was the height above 1fbqq u7q m-b ,-imm8jthe ground from which the object was released?

  11.06: A ball of mass =0.100 kg is launched straight upward so tq-;m(wrkur zzdn2 5i;r7mq , bhat it rises to a maximum height of 12.0 m above the launch point. Ignore air resistance. When 5qirk;m, 7(q zrwn ud2;z- rbmthe 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 =0.10zz,g,q0xb b x-0 kg 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 the ball to xx0- ,,bzqzg breach the maximum height from its launch?

  98.31: An object sliding down an inclined plane has speed 0.40 m/s tzl gd7 :lg1py9wo seconds after it begins 7 :1 lyggl9zpdto slide. Approximately how far does it travel in three seconds?

  98.40: Coin I is thrown upward from theov.dl-wve (r3 top of a 100-m tower with a speed of 15 m/s. Coin II is dropped (zero initwv( 3ovl re-.dial 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 thrownr ,ml8nvwx6* gzx5n/gb7zw/ e *ec6oe directly upwards with twice the initial speed of another, how much hie765 8xxnrezm*zg/n bce w /*w,lvog6gher will it be at its apex?

  02.30: A box falls to the ground from a delivery truck traveling at 30 mkzadpww :v1/utb g 38+/s. After hitting the road, ip+wt8g1:/3 u vwa zkbdt slides 45 meters to rest. How long does it take the box to come to rest?

  03.29: An object is throqd ,q.:y jv,o gtaml(6wn upwards with a velocity of 30 m/s near the surface of the earth. After two seconds what would be the direction of the displacement, velocity dq v m.,o (g6yta:l,qjand acceleration?
displacement velocity acceleration

  04.10: Three stones of 0f pvl *km2+f0*gc k5nrk2 vrrdifferent mass (1m, 2m& 3m) are thrown vertically upward with different velocities (1v, 2v& 3v respectively). The diagram indicates the mass and velocity of each stonefg2 p25c* v*0vkl kfn+0rkmrr. Rank from high to low the maximum height of each stone. Assume air resistance is negligible.

  10.25: Two point objects are launched straighx2r.c :8xvyq-0wh;g*wn pp mht upward with identical linear momentum. Object 1 has mass M and reaches a maximum height H above the launch point. If object 2 hasgy2;p p: rxv w8wxhc*nq -0.hm mass 2M, what is its maximum attained height above the launch point in terms of H ?

  04.28: A rubber ball boub-* -z:wkj n2, zazyd 8p0mdstnces 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 air between the first and second bounce was 1 second, whats,ty -zjmd 8:wk0zz2adbn p*- 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 mini (7(nx.x n z5eqxy:e)i2be awomum speed during flight. If :( a5xn7xyi2n. w(beq e )oezxthat minimum speed was 15.0 m/s, what was the projectile’s initial angle of launch from the horizontal?

  05.02: A pebble is dropped f)kx*j5s6yneerk q j::ow 12xerom a high vertical cliff. The collision of the pebble with the ground below is seen 1.50 seconds afto1qe:*j2k ):rx56ksene yjxw er the pebble is dropped. With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about the heix08fvpc9 xjpygq . +6zght of a parking garage. One student suggested that to determine the height of the garage, they simply had to drop tennis balls from the z9vp0xq8 c6p.f gyj+x 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 stp )k(e1z gqa.+g(vgk eraight line. Its initial position is x0 = -5 meters and it is moving away from the origin and slowing down. In this coordinatezkpae).gkv g 1 +q(e(g system, the signs of the initial position, initial velocity and acceleration, respectively, are

  04.38: A small point-like object is pe4bd.a9u) or yulled 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 lo4)9ae. u bryodss of energy and that it takes negligible time.

  06.13: A rock is droppcar, v0 avcqsigx h7-8 jj07i8ed from the top of a tall tower. Half a second later another rock, twice as massive as the first, is dropped. Ignoriar0s -ijic, 7a8 x8cqvjgv0h7ng air resistance,

  06.18: A cart is initially moving aez:8 e2jz9 hhcc;r.xo f6r( mjt 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 ajz6er moc z;c82h(x9hr.: fjet 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 col .r9m.ge0ulart comes to rest after tr gu.rel0.9 lomaveling 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?

  08.03: A dog starts from rest an/zw h:(s xe5a6h aoro0d runs in a straight line with a constant acceleration h swa06oa/r5o he(:zxof 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 mlo(im x2 :y9y02cfq/f n+nt oh above the ground. If the ball falls the first distance 0.5h in a time t, how much time is required to fall the remailmfxf o:2y ninct (+y/qm2o0 9ning distance of 0.5h?

  10.38: Two objects both move and uniformly acceo1 vsi.z)p1kt lerate to the right. At time t=0,the objecv si)o 1k1tp.zts 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 Object 1?

  12.26: An object is thrown horizontally with speed 10.0 m/sxt dmw;t-pbdvn7wn 5,89 ) jom 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 ob v8 7m,5dx) wp-9tb jnmowntd;ject’s flight to the ground? Ignore air resistance.

  13.10: An object is thrown straight upward. The object reml k;jjw2,,mdp3qd hl) e14 zruains 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 p1d k,edw )rhm zl4,j2luj q;3of time during its flight?

  14.03: An object is dropped into free+nlu/f(f; 7)wqelo d k fall. Through how many meters does the object fall d ;fk()ll7+u de/nqwo furing the first 3.00 seconds of flight?

  15.02: A box uniformly slides 7.50 h ,i-ri jg6vu+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 its sli+ ij,v6ru -ighde?

  14.07: Starting from rest, a cart uniformly accelerates to a speed of 7.60 ml( -kwj gvpf3u glx 7d1s7:t4a/s in a time of 3.00 s. Through what distance does the cart move in thisafdw-tk7l: p (g3lsgv 74xju1 time?

  14.16: A toy car initiallyuo.v h(sy+2;gc( v svj moves to the right at 60.0 cm/s. Five seconds later, the car is moving at 40.0 cm/s to the lefts(u gsh2;o(+ y.vvv jc. 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 velocity of the car during the five second motion?

  14.17: A toy car initia90q huk4 g fp9zeup5bgk- 9 kb35v7ahtlly moves to the right 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 fohp0uze k-9 7g kb5 a 4gfhk5v9bt3qp9ullowing 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 stak-8s kytb*0;nkg djc 7ksv:n0rting 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 of theqq-q2 frzm gt.ktf4jlr d7c/x v95u;6 following choices best represents the direction of the object’s accexu- 4qf5 /vj rt6 7;drq9qg.2 zcmkfltleration during its flight?

  13.26: An object moving only to the right complet ss/v*g1 p s,y(do)/0y w 0psj*vurhzxes 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 consts r p 1v)y*(*zjs ds,uywxgpho0vs0// ant 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 ) 1irwt e y5v2*lfx4hucompletes 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 con x25*e u)t1h iwly4vfrstant 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 cle, f tc5x.9a ;rjwz3,e mrxfp4iff, 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 of the 5;mjx3f,. f p xr,erctzae9w4 ball relative to the rock?

  16.36: On a straight road, a self-driving car races with a robot. The robot ack5zd oyq o-*:f ph*1g ycg/xh;celerao *-d f5;/1yghhz gp*:qxckyotes 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 up)y1tq /0yzraj ward. The vertical position of the ball 0.70 s after release is the same as its vertical position 4.10 s after its release. At whar/j )q0t1y zyat time is the object first at a vertical position that is one-half of the maximum height it obtains during its flight?