94.01: Starting from rest, object 1 falls freely for 4.0 seconds, and objectqujcee8lhfc 4)4 cr4p/ )l2 xw 2 falls freely for 8.02p4c4) xj)elf8/wuclrehqc 4 seconds. Compared to object 1, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to a finp.x 9b8g pgu.gal speed of 20.0 m/s in a time of 15.0 s. How far does the car trg .g x8u.pbpg9avel during this time?

  94.03: A ball is thrown off a high cliff with no horizontal velocity. It lands afiu42l4f5 d0wik5dh 6.0 s la05wd4hi5ia4f ud2fkl ter 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 accelerat . 0zul2x v 5gmrxj8*t*sof9daing vertically upward at 05d*rfmg xzsa*x9 vj8.2 ltuo$10\;m/s^2$. 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 muo3/kd( w3)p 3zlw/mfu tvg(k oving downwards at 27 m/s at one instano w(3)m/pu(fk /l dug kz3w3tvt. 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( zc+y fy88frc;j3u vpdj+rf/ 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 of a bhvlqz*vxc0 :q h+/ x7nuilding strikes the ground with 07 q xnxz* l/vhhv:+cqa speed of 30 m/s. Assume air resistance can be ignored. The height of the building is approximately:

  97.09: At a certain time, an object in free falc)v xi-+j8w9o0e qzwh l has velocity 4.0 m/s in the upward direction. What is the apw0+hqvzjxc8eo- wi) 9proximate velocity of the object one second later?

  98.14: How long must a f 6zcjx)( 42t7cimnrs $2.5\;m/s^2$ 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 downward at 18 mimv p(wp1ms 4625ldh-nl m z0m/s. If it continuei26m-h p5mlw 4 vn spmlz1d(m0s to fall, two seconds later the object would be moving with a speed of

  17.02: A small object is released from rest lu:gh-q( y4al y6jub1 and falls freely for 4.00 s until reaching the ground. What was the height above the ground from which the object was releasedyh l6-b u:aluq14yg (j?

  11.06: A ball of mass =fi.+1 gu4pn iv- os87puv3uw w0.100 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 balp g wv iuv+uiwps4on7 uf8-13.l 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 launched straight upward so that it rcygr9-t j5;tiises to a maximum height of 195ij-rtg y;ct 2.0 m above the launch point. Ignore air 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 pla;fyg:s1je/au ne has speed 0.40 m/s two seconds af;jauf:ye/s 1 gter it begins to slide. Approximately 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 sp cgu :akp corrc*+44m6eed of 15 m/s. Coin II is dropped (zerc4opr6ug:c+k4ac rm *o initial 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 thrown directly upwards with e 9p xdhqg8bspqb+ g3.;+u(tstwice the initial speed of anothgdtxsug3hb; (. pe 8q+ps+b9 qer, how much higher will it be at its apex?

  02.30: A box falls to the ground from a del zgei +2n vy94aznh/w8ivery truck traveling at 30 m/s. After anv /zy4en zg92+8w hihitting 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 a velocirhl vf*:u r 0+uykj556;hplagty of 30 m/s near the surface of t50+hru*kr h:lj;l 6 gpy5fau vhe earth. 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 thrown vertically u*; uft9woshl1pward with different velocities (1v, 2v& 3v respectively). The diagram indicates the mass and velocity of each stone. Rank from high to low the maximh*f9s; oltw1uum height of each stone. Assume air resistance is negligible.

  10.25: Two point objects are launched sdh y so+sbgwv:( sfbq1;c9z77traight upward with identical linear momentum. Object 1 has mass M and reaches a maximum height H above the launc7 s:1q7fs gz 9yhvcbw(d;o+s bh 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. After each bouncet*td8-e 24hmdp(anxz , the ball reaches one-half the height of the bounce befor p(-x*tz8 natd4de m2he 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 free fall achieved its mig sqr/1 x704./zpo.dqwsfoh d nimum speed during flight. If that minimum speed was 15.0 m/s, what was the projectile’s initial angle of launch from the 7dzr.4pd hw sg0 ofs/q.q /o1xhorizontal?

  05.02: A pebble is dropped from a hioaf 6)aw /;xub xaev0e.hrm.0gh vertical cliff. The collision of the pebble with the ground below is s.00xv 6b ex r;)awaheaof/.umeen 1.50 seconds after the pebble is dropped. With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students wer/da*x *4-2npmfg m:wp zaqy ;ke arguing about the height of a parking garage. One student suggested that to determine the height of the garage, they sq:g /2ky fmw*m;p-zx anda *p4imply 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 p 1n)/h6y qdxntosition 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,d 6q n1)tyhnx/ are

  04.38: A small point-like object is pulled downwards by gravity (down the pr lkib 6a4kce08 z/z/hlane of the page) but is constrained to exactly follow each o/6z/l r bcz e048aikkhf 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 loss of energy and that it takes negligible time.

  06.13: A rock is dropped fr*grwj:44hipsgw dn ()-vzc 8oom the top of a tall tower. Half a second later another rockch4rzvj4 o8 :n*pd )gwgsw( i-, twice as massive as the first, is dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s 2 mhgdgi-oqd. :/db2 yalong 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 does thbo-m/qg.dygi 2d2h :de cart travel before coming to rest?

  07.11: A cart is initially moving at 0.5 m/s j-yvzgt(v2k ) 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/sv(j gvy k2-zt). How far does the cart travel before coming to rest?

  08.03: A dog starts from rest and runs in a straight line witonj-;vk;8.s i ge, 3g dl1edjch a constant acceleration of;s ,ge;g kl -.ndo1vjde8cj 3i 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 heigo3y+ 1t ,uazjght h above the ground. If the ball falls the first distance 0.5h in a time t, how much time ,joz 1 gu+ya3tis required to fall the remaining distance of 0.5h?

  10.38: Two objects both mh.p8ps n p8g,xove 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 acceleration of Object 2. After some time T, the velocity of the two objects is the same. What is n,.p s8xg8pphthe 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 amm d1w/q jj)v,yod ,(m height H above the ground. The object reaches the ground with a speed of 20.0 m/s. Whi)ymmvj ,1doj, d /qmw(ch 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 l)j d l7fb*q:mupward. 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 lj7)b*f: q dmlfunction of time during its flight?

  14.03: An object is dropkf/-wp ;o6ln xr3/z 70h chnqpped into free fall. Through how many meters does the object fall durinqpp6lo3-n/xf r7;0w/n czkhh g the first 3.00 seconds of flight?

  15.02: A box uniformly slides 7.50 m to rest g/ib m5s6 zj/) y.ewqhvmr;2macross a flat surface in a time of 12.0 s. W hg6/vyi r)m/b z2sej;w.mmq 5hat 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/s vy5i5 mx/a tv+in a time x m5 vt5iay/v+of 3.00 s. Through what distance does the cart move in this time?

  14.16: A toy car initially moves to the right atlho; mfkpzm(a3b(the/4 e5(x 60.0 cm/s. Five seconds later, the car is moving at 40.0 cm/s to the lm; ex (tez (m5bp4hakf/o(h3left. 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 m oy;3 nl+ps+g0p r0nhioves to the right at 60.0 cm/s. Five seconds later, thhi;plog0 3 pns+ +ny0re 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 constant acceleration startin.ou v 4q qh)q2v5zo6lhg 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 ph0w jyri,)/ bthe following choices best represents the direction of thejhbr i ,wp0/y) object’s acceleration during its flight?

  13.26: An object moving onlyhyjx7/9k; vobd.5 w mx to the right completes 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 mkjmb5xhxvw ;9o 7 /.yd/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 completes a 20.0 sndg5q *qbm 9/fc 3)kspbzg72xecond trip with an average speed of 10.0 m/s in two stages. During stage 1, the object moves with a con 2ncs5qkgd)7zg/xp*9qmf3 bbstant 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 clif+*gs litplg jsm.rx.vj)* s/( f, 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 initial*s g( jg+ /xpiljlv*)t.srm.sly dropped rock, what is the speed of the ball relative to the rock?

  16.36: On a straight road, a self-driving car races with a robywg ;p:pvh/qhu;0w f7 ot. The robot accel/;hqhu;pw :pvy7f0wg erates 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. Tk vjp39w /x3tzhe vertical position of the ball 0.70 s /z933pvt jwxkafter 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 height it obtains during its flight?