94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and objectkpj,bf+2c iw++x;q on 2 falls freely for 8.0 seconds. Compared to obj2p;i++bnoj xk +f,cq wect 1, object 2 falls:

  94.02: A car starts from rest and uniformly8 lw/nsb1c9u p accelerates to a final speed of 20.0u 1l p9wsb/c8n 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 horizontal velocity. Ia )x ovul/ yjvdw6rw:svoe8m; )z+95bm5g j.ut lands 6.0 sm:.)6a9woo / z dr+ )wyxvbvvu5muj8gl;s 5je later with a velocity of 40 m/s. What was the initial velocity of the ball?

  95.27: A rocket near the surface of the earth is acceler.g0k9u)js6r j4 aeivfating vertically upward at fes vai0r9 6gj.4j)ku $10\;m/s^2$. The rocket releases an instrument package. Immediately after release the acceleration of the instrument package is:

  95.13: A freely falling body is found tom:7jwu0 ihiw4 be moving downwards at 27 m/s at one insw wij47:im hu0tant. 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 rest anb 5(ivdk0 2y z,jf g.uftpy:r8d 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 groundq0) ,zlmp(3m ex 4r giue.7gkozj08ge with a speed of 30 m/s. Assume air resistance can be ignored. The height of the building is approxkg.zj48r z,l0ee gegmo)m7x pi3q(0 uimately:

  97.09: At a certain time, an object in free fall has velocity 4.0 m/s ix4+vk7bu 4ws ,s9egsgn the upward direction. What is the approximate velocity of +4s,4skux7 gs9e bwgvthe object one second later?

  98.14: How long must a ks7v+hsobg*w iu))l4( hci w( $2.5\;m/s^2$ 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 be moving downwardfick*yez -,ofg :/d(k at 18 m/s. If it continues to fall, ( d-eo ifkfgc*k:/z,ytwo seconds later the object would be moving with a speed of

  17.02: A small object is released from rest and falls freely for 4.00-sauy zj ,8t 9wze+uohah:ndu32a+ p3 s until reaching the ground. What was the height above the ground from whz3uhtuu d s9oy+ wjh+aa-, 2z3ne8p:a ich the object was released?

  11.06: A ball of mass =0.100 kg is launch2e 4;eupwl 0qcth/p,k ed 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 follop pl24e0 q/;e,tkhuw cwing 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 =0.76fupn.0fwy4 enxb. oxhi( o8100 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 reach the maximum height4wn .67xu foxon0if8.hye b(p from its launch?

  98.31: An object slikk2yp l 4zre g)y7t5c9ding down an inclined plane has speed 0.40 m/s two seconds after it begins to slide. Approximately how far does it trav)yk4lctgp 2zey7kr5 9el in three seconds?

  98.40: Coin I is thrown upward from the top ok48wt. w;96rwjbzmjsd4k: oa f a 100-m tower with a speed of 15 m/s. Coin II is dropped (zero initial speed) from t: 9o ;wbw z a.kw4mjr468dkjtshe 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 i25 7rqhcy/tc ynitial speed of another, hyy5t r/qc72hcow much higher will it be at its apex?

  02.30: A box falls to the grounduls.;c/.9bxl n abj2 s( ozu2n from a delivery truck traveling at 30 m/s. After hitting the road, it slides 4 snub.jlc b/;( lzoua2x.9n2s5 meters to rest. How long does it take the box to come to rest?

  03.29: An object is tuh 7nl.0ikel (cf3wevu8xf *1hrown 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 and accele8i. k0nl* f(wl cexh7u3feu 1vration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, 2m& 3m) are thrown vrpz s*bthc4;1p w2rr+ ertically upward with different velocities (1v, 2v& 3v respecbt1p hws4*;crrz pr2+tively). 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 with identqh4nee-d,* wbo0mcm ela ,6l(ical 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 above the be dnq4(0wl, em6hecam* ,ol-launch point in terms of H ?

  04.28: A rubber ball bounces on the grouyj/m -ame33 mind 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 tmye3a j3i/m -mhe 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 projectiswpnfc) -34 9e*dy ujbb6 w2pp58urhile 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 pb wsipp hj43c u56yb*2 durnw)e 9f8-the horizontal?

  05.02: A pebble is dropped from a high vertical cliff. The col7pjg 1jbrwf903lode/i j4zm 0lision of the pebble with the ground below is1 3fdp 9ier4j0j7zbgolmj/ 0w seen 1.50 seconds after the pebble is dropped. With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students fxm ad/6aw -bfpv+ 3r26mfkh5 were arguing about the 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 baa366 a-+2fbdk fx5 pfrm w/hmvlls. 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 in g vb y:f8w rkil7f0+o8sb:g1ifph9r+itial position is x0 = -5 meters and it is moving away from 78 1pv fbof0wf: rggsr+hk+:9lbiy8ithe origin and slowing down. In this coordinate system, the signs of the initial position, initial velocity and acceleration, respectively, are

  04.38: A small point-like object is pulled downwards by gravity (downop hk0p*i3dwp; jse1t +b;s; t 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;d s+kbe 13tp*s ;oh0;ippj tw (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 drop0nmy xwsa 32(qped from the top of a tall tower. Half a second later another rock, twice as massive as the first, is dropped. Ignoring air resistann3w (0yaxqms2ce,

  06.18: A cart is initially mo vnd( (m+r/2 rj:ul xh6lkatw)ving 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 initially moving at 1 m/s. How far doe6:j2(ldxmr ) k( htnvaw+l ur/s the cart travel before coming to rest?

  07.11: A cart is initially moving at 0.5 m/s along a track. The cart comes ttzzp /, o9:5wnd.kveho rest after traveling 1 m. The experiment is repeated on wht:5 9p.,v k/zzdnoethe 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 resdpf.qok 5:um2 t and runs in a straight line with a constant acceleration of uf2.5k dpo:mq2$.5\;m/s^2$. 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 aeyk)vhjx++4kr( n 8yp+*o y9 nli5xfnbove the ground. If the ball falls the first distance 0 n4vkn*( +h+yj 5pxkfy8n er9x+iylo) .5h in a time t, how much time is required to fall the remaining distance of 0.5h?

  10.38: Two objects bodcx(j1- 5z9def- *hz ,li)f )sbvia wrth 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 accelerati9-,f 1)cz (bj*i r ilvwesddah5f)-zxon 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 witg/*5oc.2: py hb zgqf4mtyjp4ib 3/nih speed 10.0 m/s from a height H above the ground. The object reaches the ground withi4ziny 5t :3p2cgq/h /4j ofmby. gpb* 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 stra57, pfjdu1s3 13 gycq ,nbkrraight upward. The object remains in free fall until it returns to its initial launch point. Which one of the following graph5a1rdk,bqurf 3 1,y7ngjcsp3 s could represent the velocity of the object as a function of time during its flight?

  14.03: An object is dropped intf+7 )o mvj+xhrq-ucn8 o free fall. Through how many meters does the object fall during the first 3.00 seconds of fou rm)n++-7f hqvxc8j light?

  15.02: A box uniformly slides 7.50 m to rest +94-pqed6ekyl8m l:+ x qudfy across a flat surface in a time of 12.0 sy+dpe 8xl6mkyef l-+qd qu4 9:. 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 m/sm 0tcai99:r3dto*-1 evweede int dd vewoeect09em3r:-9 a1i * a time of 3.00 s. Through what distance does the cart move in this time?

  14.16: A toy car inig:(a lj88-r.q v bjroctially 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 d(j8vrg brqjo-. 8 lca:isplacement 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 to t12n 62fyyrt6kwp ;glx-tx o 4jt u5y(she right at 60.0 cm/s. Five seconds later, tht- ;w2ok ugyfp562r4 syx6(t jl1 nytxe 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 motion?

  14.33: An object moves with constd 2 zewlp,t)ir(8yxp8ant 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. Whij i0 4wjvvgz2:ch one of the following choicgvji2wjv: 04 zes best represents the direction of the object’s acceleration during its flight?

  13.26: An object moving only to the right completes a 20.0 second trip in tbo kgudm.vwh/ zk /d1 2q:u*w(wo 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.o q:(wu1v mbd/.u*/zkdh2kw g What constant acceleration must the object have during the 8.0 seconds of stage II?

  15.32: An object moving along a line c 3-5ynehsa.dor 0twoq .wzq -)ompletes 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 for 12.0 seconds. What constant magnitude acceleration directed to the left must the object have during the 8.0 sertwn-o wy) zqoh .e0.3d sq-5aconds of stage 2?

  13.33: At the top of a high cliff, aa;kf,lr5hrser zy0u: *r-y f 5 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 50*arfrlr;:ez-hr, 5 k fuysy 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-driv snz:uv 7ha7w+ing car races with a robot. The robot acceler7n hvauw:s7 z+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 vertivozg8neu4ika0v q3; 9cally upward. The vertical position of the ball 0.70 s after release is the same as;k3 e nq4zg iuv9a8ov0 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 height it obtains during its flight?