94.01: Starting from rest, object jg/wl;3:t1 womw+kvm 1 falls freely for 4.0 seconds, and object 2 falls freely;ktw/ wv3wlmg +: 1mjo for 8.0 seconds. Compared to object 1, object 2 falls:

  94.02: A car starts from rest and uniformly accele f30x gz*7oohjrates to a final speed of 20.0 m/s in a time of 15.0 s. How far 0 jxh g*7fo3zodoes the car travel during this time?

  94.03: A ball is thrown off a high cliff with no horizontal velocity. It lands 6 : z+5io *(8zncxfv al0j+rntx.0 s later with a velocity of 40 m/s. What was the initial z(8+cxa f t :5jl r*x+vz0nonivelocity of the ball?

  95.27: A rocket near the surface of the earth is accelerating vertically upwar2 suzl )ctlz/ g1c:2xbd at u2l2: /lxt)bcg szcz1$10\;m/s^2$. 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 d-h b8b5gpj ( k ja0vmu-h9pwu;ownwards at 27 m/s at one instantgmap( j-v5j0u hw8pbu;9bk- h. If it continues to fall, one second later the object would be moving with a downward velocity closest to:

  95.39: A car starts from yvgb8 g;th8f6q g8t5 .9hdvbjrest 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 drocu/xlera (01rx3 zfh:pped from the top of a building strikes the ground with a speed of 30 m/s. Ass3lx(1/fa :rxhrze0cu ume air resistance can be ignored. The height of the building is approximately:

  97.09: At a certain timrpnjtj jo/w 4(mm5f *2er+j8l 3:awvje, an object in free fall has velocity 4.0 m/s in the upward direction. What is the approximate velocity of the object one second later?vp jjt5(l8j*4wj are m3rjw/f2mo+n:

  98.14: How long must oa-fkqqbdv*5nf ,s .( 5f2glta $2.5\;m/s^2$ acceleration act to change the velocity of a 2.0 kg object by 3.0 m/s?

  98.15: A freely falling object*e(g*u8)megl j ezv1mj 05izh is found to be moving downward at 18 m/s. If it continues to fall, two seconds ( gie0vz *mm*je5gjzl8u)eh 1later the object would be moving with a speed of

  17.02: A small object is releaseiqpe3utf q:1+d from rest and falls freely for 4.00 s until reaching the ground. What was the heit ip:q+fu q3e1ght above the ground from which the object was released?

  11.06: A ball of mass =0.100 kg is launched str 6dyle- 1 k34z0w*glwydcj:j caight upward so that it rises to a maximum height of 12.0 c l jj:34y*elykwd0gwd 16-z cm 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 launc9ler/ mk)rw+i hed 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 wr)r/i mlk9e+ maximum height from its launch?

  98.31: An object sliding down b20asej5:-3fliz0 (lv jm ; rfmzowj91j5m lxan inclined plane has speed 0.40 m/s two seconds after it begins to slide. Apprvz0xo zjl0 5b-wfr(as:e1235 f 9j lj m;mimljoximately how far does it travel in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m tower with a speed of 1hjj3h j68 /pd.nv7z fu5 m/s. Coin II is dropped (zero initial speed) from thhjd7fv .jz3/j8p n u6he 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 twg6gw :drq .+e9nr*liaice the initial speed of another, how much higher willgeqi:. gr+w9 dnlar6* it be at its apex?

  02.30: A box falls to the ground from a delivery truck travelingrx3hthj 1(nq)xh)i2h at 30 m/s. After hitting the road, it slides 45 meters to rest. How long does it take the box to comer q)jxi1)2htn hh(h3x to rest?

  03.29: An object is thrown upwardsa ms8k5 x.jm+3bhbgl. with a velocity of 30 m/s near the surface of the earth. After two seconds+.3lm58 a .mkhj gsbxb what would be the direction of the displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of,i-q 33ky kt.iw lv(pc different mass (1m, 2m& 3m) are thrown vertically upward wic (.i kwk-,ylp33vtqi th different velocities (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 launched straight upward witk j1mchpf *6oleq g)3+h identical 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 maximu ch* l61gqf+pmo)ej 3km attained height above the launch point in terms of H ?

  04.28: A rubber ball bounces onyxqd 7d(f;x 5cpu/4p j 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 ( qx/;ddfc x ju4ppy57between 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 free fall achieved its m8 q(r(zm7l j( adwlfpu*nu1m2inimum speed during flight. If that minimum speed was 15.0 m/s, what was the(num (q2rwd7*alz fm1( j pu8l projectile’s initial angle of launch from the horizontal?

  05.02: A pebble is dropped from a high vertical cliff. The collision oz(2p lpoy/tzd1m75 :au z0hnuf the pebble with the ground below is seen 1.50 seconds after the pebble is dropped. With what speed did the pebble hit the ground? Ignore air resista: l5mya ptzuu(z1/20h7dpz nonce.

  06.03: Three students were abd uggyhn- 5,7rguing about the height of a parking garage. One studentdub hgn75, yg- 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 the parking garage?

  05.07: A snail is moving along a straight line. Its initial pos j5yk b0+u,w0eqq wmjzm.(aw qvs/z50ition is x0 = -5 meters and it is moving away from the origin and slowing down. In this coordinate system, the signs of the initial position, initial velocity and acceleration, respectively, areb vm 0s ,jywamjqwqz5e0.+0 /(uk qz5w

  04.38: A small point-like object is pulled dzg )8ru9v8gz-)hrr k fownwards 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 vz 8rf 8)g ruz9gr)-hkbe 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 am32c*frsn(si8 m 7pgthe top of a tall tower. Half a second later another rock, twice as massive as the first, is dropped. Ignoring aip*8 si 3 2am(nr7fcmsgr resistance,

  06.18: A cart is inito/*y w.f.ewzaially moving at 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 initia.o e zwyf.aw*/lly moving at 1 m/s. How far does the cart travel before coming to rest?

  07.11: A cart is initio z0ylx. mq:pv4qmct h76 m(r/ally moving at 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 no h6tmxqr mv: oy.4/ (mz0p7cqlw 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 with a conpc4x5.pqoxp;fu5wc(8 o n xa ;stant acceleratx p pq 4(55.onw;cx8 oua;cfxpion 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 recdnp9 dp0hi-j6f)*z esistance from a height h above the ground. If the ball falls the first distance 0.5h in a time t, how much time is requird*-ih) pcd6pe 09fz njed to fall the remaining distance of 0.5h?

  10.38: Two objects both move and uniformly am;htn pu0*t* 4p qitr;ccelerate 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 dihpi4 *t; rn0*tqm;ut pstance traveled in this time T by Object 2 to that traveled by Object 1?

  12.26: An object is thrown horizonta zl, fn47d7bgblly with speed 10.0 m/s from a height H above the ground. The object reaches the ground with a spen4b g,dl7fz7bed 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 fanokg)gvs -mfshr 7 2r +*hia6h g,5qt0ll until it returk af+mnghoh 2,i-0vs)7ghtr56q s* gr ns 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 many meters does t /g 6w.qc91cie+c urw28y ssonhe object fall during the first 3.00 seco/+9qww 61cs. rcsie2u g8cnoynds of flight?

  15.02: A box uniformly slides 7.50 m to rest across a flat surface in a timaf ss9mux c:14e of 12.0 s. What was the initial speed of the box whenssm4u:fa91 c x it started its slide?

  14.07: Starting from rest, a cart uniformly accelerates to a speed of 7.60 m/s ik;pc , ofoyk)fyh2 0v)n a time of 3.00 s. Through what distance does the cart move in t2fp)chk 0 yo;kf), oyvhis time?

  14.16: A toy car initially moves to the right at 60.0 cm/s. Five dlg b 74nnhj::seconds later, the car is moving at 40.0 cm/ bjn::7lgd 4nhs 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 car during the five second motion?

  14.17: A toy car initially moves f/vxst)onp:q,7 udn0dbdx ,+ 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 the magnitude of the average acceleration of the car during the five second m, /v ):qsp7xddoxdb f+t,n n0uotion?

  14.33: An object movei*.c.*lga7roj j gi 7wgx8b8ks with constant 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. Which one of tbl/sg2gnuk8r;v 6c/vb n8 g8 ahe following cho/unga 88gbrsv k8 b6gcln/ v;2ices best represents the direction of the object’s acceleration during its flight?

  13.26: An object moving only to the right completes a tpu5 x)r+c.iyn+nu0j20.0 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 c.)nn5+0t +u uyrx jipconstant 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 movinu9k0k;jw7 c;ys8x+7tdoa xsz g 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 xa9dkyxu0 7;7c+jwz8ts;ks oright 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 is drop7vnay d)taf)uv m., adg/*,zj ped from rest. A ball is launched straight downward with any)af*vu a,jv .zmd a )t,/gd7n 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 ball relative to the rock?

  16.36: On a straight ro2*tpn,.61z s s ljybmead, a self-driving car races with a robot. The robot accelery.2pj 6,ntlsb e1m*szates 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.(;hdd o1hf, zsfi0b. c 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 vertical position that is one-half of the maximum b0 o(f.1h ,sfcz h;didheight it obtains during its flight?