94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and o9crwaq rn;dj5+ b t50ebject 2 fall5q+b ca r05ndtj;9erws freely for 8.0 seconds. Compared to object 1, object 2 falls:

  94.02: A car starts from rest fc v gi1a e)j3mg ;8yt7vf-+pmand uniformly accelerates to a final speed of 20.0 e pf gt73mcjv-8+ v;mi1)gafy m/s in a 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 homc .(skh3(kmsz b3jj/8i r*utrizontal velocity. It lands 6.0 s later with a velocity of 40 m/s. What was the initial velocity o8(.3/ *csu3rh sjmbkmz( ijtkf the ball?

  95.27: A rocket near tkzahu*qk2 ib m+fwj/a1l;8; jhe surface of the earth is accelerating vertically upward +mh 2;b w j81ak/zkuf;*lj iaqat $10\;m/s^2$. The rocket releases an instrument package. Immediately after release the acceleration of the instrument package is:

  95.13: A freely falling b;g. 9yvv dfn/aody is found to be moving downwards at 27 m/s at one instant. If it continues to fall, one second later the object would be moving withvyf.va;d/g n 9 a downward velocity closest to:

  95.39: A car starts from rest r+3y,zyviqao-p / 79 hnr lpy4and 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 tq fv +ykw(4j4adspr)6, 4whzt he top of a building strikes the ground with a speed of 30 m/s. Assume air resistance can be igja)4z4q+(fwr ,4t dspv wky6hnored. The height of the building is approximately:

  97.09: At a certain time, an object in free fall has velocity 4.0 m/s in the u fde3 lz.qsh/)sg5u8z.d8fogpward direction. What is the approximate velocitysdzf.g eq sl8/d5g.fho 8z)u3 of the object one second later?

  98.14: How long must a m8uo6.*) bsds lhmn 9x$2.5\;m/s^2$ 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 qklzq3se q.xf w)) 8u1to be moving downward at 18 m/s. If it continues to fall, two seconds later the oq1u .q)zs3q 8)kwxef lbject would be moving with a speed of

  17.02: A small object isje i,sei ;/bn3 released from rest and falls freely for 4.00 s until reaching the ground. What was the height above the ground from which the object was releai;ee/3,ib jn ssed?

  11.06: A ball of mass r855sixy lip12eru0n=0.100 kg is launched straight upward 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 followi rp sul5i2185yxn0ierng 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 so thh;ndf; qzhwlrb 2f/12mg +6srat it rises to a maximum height of 12.0 m above the launch point. Ignore aird1 2 rwgsmz;l;+bn /rf 6qhf2h 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 speedjd d.e*zk s ,/-e6zprk 0.40 m/s two seconds after it begin- / jde,k*k. drs6ezzps to slide. Approximately how far does it travel in three seconds?

  98.40: Coin I is thrown upward from the tkie*vaij l967v ;7jwiop of a 100-m tower with a speed of 15 m/s. Coin II is dropped (zero initial speed) from the top of the tower 2.0 s later. Assume gj77vivj iiwa e 9*l6;k 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 twic 59b3kinovtq6 +hy4yr e the initial speed of another, how much higher will it bvot35hy4k i+6bqn ry 9e at its apex?

  02.30: A box falls to the ground from a delivery truck tr cof0ua b277 w-i.huegaveling at 30 m/s. After hittinb.-7 ca07weu hig 2uofg 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 ll,w8/q17. lv0 zg6 wfplyne va velocity of 30 m/s near the surface of the earth. After two seconds what would be the direc.pwlfn06zywll1 vv /7 ,ge8l qtion of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3m) a+r6t:n4xkp(jfs 0cayre thrown vertically upward with different velocities (1v, 2v& 3v respectively). Th6+t: ky( nxcj0 s4afrpe 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 launched straight uxb 9030su/ezsvha1xmvbz0o)ul6n c a8+vt f )pward with identical linear momentum. Object 1 has mass M and reachexamue ) sxzvvn108 bzl+ a069o 0sbt c3)uhvf/s a maximum height H above the launch point. If object 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. 8brk:p1w. l epAfter each bounce, the ball reaches one-half the height of.prkl eb :1wp8 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 projectile in fhyi (u2 8.:e9odmd4znfe j6ik;a( qsnree 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 theez8q4:9(di ; ku6osidfe2(my nhj. a n horizontal?

  05.02: A pebble is dropped from a high vertical cliff. The collision of thevib0*5x8rbpma9 gr( htwey5aw /7) sg pebble with the ground below is seen 1.50 seconds after the pebble is dropped. Wiaar7*m0 bebx59s/ yg vr(5t8 hwgiw p)th what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about the 8-swc5d-*(wvs- hcgfig0t-pmt/)c ,zsjno u height 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 ps 5tc,s /utgf0s-jcw-*gwd 8-h( vznm)cio- the parking garage?

  05.07: A snail is moving along a straight line. Its initial p te:t8ot1s-hi unql+ 6 .5r5jl ;drbrmosition is x0 = -5 meters and it is moving away from the origin and slowing down. In this coordinate uj +l6thirn;lqbt5tm8 :5o rs1e.- dr system, the signs of the initial position, initial velocity and acceleration, respectively, are

  04.38: A small point-like object is q-z)1(hr rcdh dps*t:pulled downwards by gravity (down the plane of the page) but is constrained to exactly follow each of the frictionlecq:s( r* )pdhzr 1thd-ss 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 tower. Half a second later anothtl k/ 2smxluns2/vh: 4er rock, twice as massive as the first,l2s mu n s42xtlv/h:k/ is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s along a track. The cary+jtaat -oelekf0 .t ;r j-0rj 0q9q:xt comes to rest after traveling 1 m. The experiment q0-e a;0q tfk+l:x jat.t9y 0orrje -jis 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. Theha la5ah2* *uh cart comes to rest after traveling 1 m. The experiment is repeated on the sam* 5ahah*l2auh e 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 ftluj /(8xh z+ .o8yjwk*t/qyruns in a straight line with a constant acceleration8/t*qyj /joxfh(t u k y.+8lzw 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 h aj02iyr skx)c e-x1ir .bove the ground. If the ball falls the first i rxrj xke1c-)s0 yi.2distance 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 amaqw8*e87d tx.1hjo /vj1 kd pccelerate to the right. At time t=0,the objects are at the same initial position. Object 1 has initq. e71/ph w*8x8tvjdjakmdo1ial 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/s from a height H l(r2qpca k 664lhw,noabove the ground. The object reaches the ground with a speed of w6rl o 6,p2(lhcankq4 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 thro9mwc2mi b v)*qwn straight upward. The object remains 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 fu2cb) iw mvm9q*nction of time during its flight?

  14.03: An object is dropped into free fall. Through how many meters does thea*n5j /hzz kyc80xmn (,mn nm: object fall during the first 3.00 seconds of flighh(j8myn*ca,x z:n0zk /mnm n5t?

  15.02: A box uniformly slides 7.5 s h8t*5pcef6e0 m to rest across a flat surface in a time of 12.0 s.tf *s8e 6pe5hc What was the initial speed of the box when it started its slide?

  14.07: Starting from rest, a cart uniformly accelerates to a speed of 7.60 m9 +jky/xs nz*u/s in a time of 3.jxy z+9*/usk n00 s. Through what distance does the cart move in this time?

  14.16: A toy car initially moves to the righ, +p8xff5ijqbt 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 represents the magnitude of the average velocity of the ca+i qf58,pxb fjr during the five second motion?

  14.17: A toy car initially moves to the right at 60m +;x1 jx3chvymvk6,r.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 represents 1xcxj6 myhk+mr;3v v,the magnitude of the average acceleration of the car during the five second motion?

  14.33: An object moves with constant acceleration startin)ypm,gh9up: bg 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 initipquw7l8aky91;hn xk 4 ally is moving upward while in free fall. Which one of the following choices best represents the directionl1 h7 4pkyu;wkn8x aq9 of the object’s acceleration during its flight?

  13.26: An object moving onl8h/v 8qw2raf(pj p w-vy to the right completes a 20.0 second trip in two stages, I and II. The average speed of the entire trr h( qvp8 /-a2jpwvf8wip 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 movingj i-s 7rw*qbz (1meqztm08l 5x along 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 form0(q b5rjtz87 z1e* m-xliwsq 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 cliff, a * j)da a4 7bzeb3i02dgiv9ijm 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 zbji)a3m0 *ibv74ia2dd 9ej g 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 straight road, a self-dr0smwq;l ixe 5f r jto82ut8:s*iving car races with a robot. The robot accelera0 ejs2 ml;sfro8xq8i5w*tt:utes 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 launche-fodxsojj+z kps, 09*d vertically upward. 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 what time is the object first at a verfsj kzoo9, d -j+0xp*stical position that is one-half of the maximum height it obtains during its flight?