94.01: Starting from ref6 euky9r :zb)7eo e8jst, object 1 falls freely for 4.0 seconds, and object 2 falls freely for 8.0 seconds. Compared8)6r jyeo:9ek zub7ef to object 1, object 2 falls:

  94.02: A car starts from reg3k*k6qxdtj ,5b *gnu st and uniformly accelerates to a final speed of 20.0 m/s in a time of 15.0 s. How far does the car travel dq j*3kg ngb65tu,k*xduring this time?

  94.03: A ball is thrown off a high cliff with no horizontal velocity. It 7w1 qnh uziqg0h* ,78b/efzef lands 6.0 s later withh*f78u/ bqw h,fien 7zqz g1e0 a velocity of 40 m/s. What was the initial velocity of the ball?

  95.27: A rocket near thjo-yvg,,,ze-tcjwquk,d1 . c e surface of the earth is accelerating vertically upward at 1cv qj,wz -y dgtk-j, e,,o.cu$10\;m/s^2$. 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 moving downwards at 27 m/svbn gya2xl(q(wy1 /ac7 :qg v0 at one instant. If it continues to fall, one second later the object would be moving with a downward1x vqla nqybgw(72(v/:g yac0 velocity closest to:

  95.39: A car starts fromtyw x72b1b:i u rest 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 )gab4 *gl9 a)0e6szuzmq3fulof a building strikes the ground with a speed of 30 m/s. Assume air resistance can be ignored. The height of the building isg6a*qsu)ba4z 9z )e gl0mlu3f approximately:

  97.09: At a certain time, an obib6- ky8zxw l/ject in free fall has velocity 4.0 m/s in the upward direction. What is the approximate veloc 6 lixkyz-/8bwity of the object one second later?

  98.14: How long must txm4bn1t8pfemmo 86 b (li-1pa $2.5\;m/s^2$ 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 bk *epn -ao1i(oe moving downward at 18 m/s. If it continues to fall, tw p-ie*o (okan1o seconds later the object would be moving with a speed of

  17.02: A small object is released f3asxp+f/ h:kg b9;ogirom rest and falls freely for 4.00 s until reaching the ground. What was the heig 3/ gogik9f+:p xa;hbsht 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 ;638 rlkfxeii+s 5 *1hmrk ihwrises to a maximum height of 12.0 m above the launch point. Ignore air resistance. When the ball reaches its maximum height, which r+ihk1 k il;6wi *38s hxme5frone 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 lak0 agps/1pd 0lh -a)yfn6 + g/(wvupvnunched 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 reach the maxim0+y( da kuw-a f6vn/plgg/ pnvsp)01hum height from its launch?

  98.31: An object sliding down an inclined plane he 8nuh zcmp zu3 1.:1aejp/cnc:4;i-q q-qjdtas speed 0.40 m/s two seconds after it bzn1uj1 nq:ej34cq:cu pi8p.hd-ct/eq;z -amegins to slide. Approximately how far does it travel in three seconds?

  98.40: Coin I is thrown u(tnrx u0x wk2/pward from the top of a 100-m tower with a speed of 15 m/s. Coin II is dropped (zero initial speed) frtw2 /(0xkrunx om 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 initwj3.akkyqv3d yy;t:2 ial speed of another, how much hi2j;kd t:y ya y3.vkw3qgher will it be at its apex?

  02.30: A box falls to the ground from a delivery truck travelinffl mpl x.6-okny, f66g at 30 m/s. After hitting the roadxo66-fl6f,pf yn. klm, it slides 45 meters to rest. How long does it take the box to come to rest?

  03.29: An object is thrown upwarlzw,smdf*o st z528m9 ds with a velocity of 30 m/s near the surface of the eartz zt2,dom9 s 5fsm8l*wh. After two seconds what would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3m) are thrownulo6x 25 yq(of vertically upward with different velocities (1v, 2v& 3v respectively). The diagram indicates the my 2uxfl(6oq5oass 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 idqh 4p1vd75 2pxcea sd4if9l8 rentical 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 maximum attained height abovex9 e2d4f4qias 8h1 7 vlcppd5r the launch point in terms of H ?

  04.28: A rubber ball bounces on the ground as shown. After eacf 4px*f0 io 0 96b,e xqib4boa0tfa8gmh 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 se4b8a90q0fxbgoito6,m pi0 xfa b fe* 4cond bounce was 1 second, what would be the time between the second and third bounce?

  16.21: At 1.94 s afttxnu6c4yl f +ur7(80iibv6ener launch, a projectile 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 from8vicfbnr +0eu(6 y7un t6lxi4 the horizontal?

  05.02: A pebble is dropped from a high vertical cliff. The collin r6y,hh .g+vusion of the pebble with the ground below is seen 1.50 seconds after the pebble is dropped. Wit hr ghuy6n,v.+h what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were mo:pdm7m. +qe4sjmm b9g )6ko as,pj8arguing about the height of a parking garage. One student suggested thapb mm,+d79oq.e6ksmao mm g)4 j: p8jst 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 the parking garage?

  05.07: A snail is moving along a straight line.:c*r**3 pcp g w4lag06tfwxq w Its initial position is x0 = -5 meters and it is moving away from the origin and slowing down. 6*3a*cgpqwwf *:gcl4 xwp 0trIn this coordinate system, the signs of the initial position, initial velocity and acceleration, respectively, are

  04.38: A small point-like omi52j qwq0o+q)lbk7q bject 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 longest in terms of the amount of time (T) necessary for the object to be b )l5ko jq0qwq2m+iq7released 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 tadis2c8 j j8s7wp6cgfy qm0g9tmku617m u;e b;ll tower. Half a second later another rock, twice as massive as the first, is droe1mjdb m;7g8q 8twjscu p;u 066 y 9sgf2ck7impped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s along a track. The cart comes t5dsy *dd a jqmoq7(u o*ubv5 x6x0+er,o rest after travel*56 (mya od7jeob,x0d*v 5 xd ruq+squing 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?

  07.11: A cart is initially moving at 0.5 m/s along a track. The cmnhgpw5z2s,6k*xn0 cart comes to rest after traveling 1 m. The experiment is repeated on the same track, but now the cart is initially mg6nk0p*nc 5w z2sh ,xmoving 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-/ zyjs;n9plr/wuu bsc)+x) n straight line with a constant acceleratrwzs 9yc- xun lb/)su/) p+;jnion 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 fall bl-51v ou */p4r*n 7efbkqygis without air resistance from a height h above the ground. If the bn7*kl b/rfog- 5 p1qbieyvu 4*all 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 and uniformly accelerate to the rig,l3fzvq4ir 7 uht. At time t=0,the objects are at the samvl,7u r4fi3 zqe 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 mt)f.)dwo k,i7an htm v*c3:db/s 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 cc.tib ,):t mv7ka)wndho df3*hoices 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 r p.d 2x icdrc0+ghm*h(emains in free fall until i.d(2h0rhx+icmpc g*dt returns to its initial launch point. 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 majph34tz s6pid xb*z4, ny meters does the object fall during the first 3.00 seco ti hs*4dxp3zp,jz64bnds of flight?

  15.02: A box uniformly slides 7.50 m p mg .f;z:hdb zo28i/ xrv,k5ato rest across a flat surface in a time of 12.0 s. What was the initial speed of the box when itg/pixd8zv.f ,arm52hk;ob :z started its slide?

  14.07: Starting from rest, a cart uniformly accelera/i, wwcc.f -dptes to a speed of 7.60 m/s in a time of 3.00 s. Thdif,/-cc . pwwrough what distance does the cart move in this time?

  14.16: A toy car initiaog 8spb :6t1mully 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 following choices best represents them:68usob 1gtp magnitude of the average velocity of the car during the five second motion?

  14.17: A toy car initially moves to j,t4 w1enfwv2rnu )z2 mw( q*sthe right at 60.0 cm/s. Five seconds later, the car is moving at 40.0 cm/s to the left. Thsw41(u n*rew2 j)t,m q2 wfnzve 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 acceleratione et*)bt (gqx9 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. Ww1jl eo,n i5kpr,m8 3chich one of the following choices best represents the ,ejcwmrik38o,p5 n1 ldirection of the object’s acceleration during its flight?

  13.26: An object moving only to the right u ml2dm:z)g-fh. w,srcompletes 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 constant velocity of 6.0 m/s for 12.0 seconds. What constant accelerm,wdmzsf .2) rgl:h u-ation 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 trip with awew;jm; ./kcgb.ph 5 cn average speed of . wemw ;j;/bghpk c.c510.0 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 must the object have during the 8.0 seconds of stage 2?

  13.33: At the top of a high cliff, a small rock ix21)gtrowah , s 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 1h txa2ow ,)rgthe ball relative to the rock?

  16.36: On a straight road, a self-driving car races with a robot. The robot ku4 hkluua8,ey j,awg ,7x)r +accelere uul)j7y,8 rka+gax4,whk u,ates 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 upwardlh niys.)z f x2):k4miwn+t.j. 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 timnzkswl .ht:2 ) j4yxi) fin.m+e is the object first at a vertical position that is one-half of the maximum height it obtains during its flight?