94.01: Starting from rest, object 1 falls freelfgljk; ; zj.m2y for 4.0 seconds, and object 2 falls freely for 8.0 seconds.;z;.lfj gk2j m Compared to object 1, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to a final speed of 2fk )*)qmlw. y92idpe k+/ld qf0.0 m/s in a time of 15.0 s. How far does the car travel during tdfm9+de)2 w )lp q*yfkqk li./his time?

  94.03: A ball is thrown off a high cliff with no horizontal velocityep.i22g al e*v. It lands 6.0 s later with a velocity of 40 m/s. What was the initial velocitl2av i2eg p.*ey of the ball?

  95.27: A rocket near the surface of the earth is accelerating vertic7 hrucz.0u)x xally upward ax.cu) 7uzxh0r t $10\;m/s^2$. The rocket releases an instrument package. Immediately after release the acceleration of the instrument package is:

  95.13: A freely falling body is f z)i4d yhwa c2*3xxyf2ound to be moving downwards at 27 m/s at one instant. If it conticz xf2d3w4xah y *2iy)nues to fall, one second later the object would be moving with a downward velocity closest to:

  95.39: A car starts from rest and accelera z (lh n)a*l.*byy9 ;xbm i6+tqitrtt1tes 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 thwukoh+-h/u3d 4 z2 kdhe ground with a speed of 30 m/s. Assume air resistance can be ignored. The h-u dh4/ok+ u2hd kz3wheight of the building is approximately:

  97.09: At a certain time, an obl*ql .92; vf z4xbe;wocgt: qoject in free fall has velocity 4.0 m/s in the upward direction. What is the approximaqlle2o xvqf*tz wg;b.:;94co te velocity of the object one second later?

  98.14: How long must , s(g*f n.b +rpdvyqj4a $2.5\;m/s^2$ 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 mov: xa *ukv-q +zyw3q1yding downward at 18 m/s. If it continues to fall, two seconds lawx-zuy v*ykq1 qda3+ :ter the object would be moving with a speed of

  17.02: A small object is released from rest and falk sa) wmxn wn+qygmcn;e, m72./w19jyls freely for 4.00 s until reaching the ground. What was the height above the ground y);w mekaq+mc1s,2.ygm 7 njwxw/9n n from which the object was released?

  11.06: A ball of mass =0.100 kg is launched straight upward so that it rises towz (,9rvtq3kx c/(f oe 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 fq o(/x 3,zr(tkefv w9collowing 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 straigmj4p / aqq/4szht 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 he// sz4 aqmqjp4ight from its launch?

  98.31: An object sliding down an e g4o h9ktp/5.hnjzl4 inclined plane has speed 0.40 m/s two seconds after it begins to slide. Approximatel/ol4jnt.hh zpg 95ek 4y how far does it travel in three seconds?

  98.40: Coin I is thrown upward from the top .0 qi7w5 x ivrx+iozkfw 3 lfc4k08o(iof a 100-m tower with a speed of 15 m/s. Coin II is dropped (zero initial speed) from the top of th3 4k.zwf(i 8ri k oi5qxwfo+il00v x7ce 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 o)d wir eoosb*+ in m471h-ls+twice the initial speed of another, how much higher will it 1e+n-o sms+w ih* lbio7do)r4be at its apex?

  02.30: A box falls to the ground from a delivery truck tra*8x,qfl1 p ghsveling at 30 m/s. After hitting the road, it slides 45 meters to rest. How long does it take tqph8*s, l1f xghe box to come to rest?

  03.29: An object is thrown upwards with a velocity of 30 m/s near theg9 fw 3no,)kv( ,hkmgi surface of the earth. After two seconds what would be the direction of the displacement,iom(w,)3,kfg v9kh gn velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different map d .:jn(j; ;ecbs2cjxss (1m, 2m& 3m) are thrown vertically upward with 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 s.:p dj jn;; (jcxceb2air resistance is negligible.

  10.25: Two point objects afun ;t+++ jt9x26lhx7rim x4xrdnj e6re launched straight upward with identical linear momentum. Object 1 has mass M and reaches a maximum height H above the launch point. If object 2 646ri;j frxn7tj+9+xl2mxhud +e nxt has mass 2M, what is its maximum attained height above the launch point in terms of H ?

  04.28: A rubber ball bounces;dn a*995qaj:psquc; zc) hf5:l1 bin3fraqq on 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 between the first and second bounce was 1 second, what would be the time between the secon; 9la c1q :jfn: h9 q;rzaaibqcf)q5sund5p3*d and third bounce?

  16.21: At 1.94 s after launch, a projectile in free fall achievemvav fd :8 hfp9bex-mc0pr7./d its minimum speed during flight. If thatae9pbr mh 0-/d.fvf 8mpc7v :x minimum speed was 15.0 m/s, what was the projectile’s initial angle of launch from the horizontal?

  05.02: A pebble is dropped from a high vertical cliff. The co3m8cutzh g2 (s9xyx /tllision of the pebble with the ground below is seen 1.50 seconds after the pebble is dropped. With what speed did the x8 tu(3z29 ygmxc/sthpebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about the height of a parking00 ih4w gy70qudm li:k 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 falhmq0d 7lug40:0i i wykl 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 inaahc2 ,n)jf. fitial position is x0 = -5 meters and it is moving away from the origin and slowing down. In this coordinate system, t, ha c)f.n2afjhe signs of the initial position, initial velocity and acceleration, respectively, are

  04.38: A small point-like object is pulled downwards by gravi kl *qda lwd fj9cr4;+mc1b,/vty (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 released from rest at point A and trf9kw/ q+lb,a4 l;rmcd j*cv1davel 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.f lh ;v lfwvhtq3pm/1i)jur::(m(/d u Half a second later another rock, twice as massive as the first, is droppeh: q 3)i ummf1dvluhl/pjr(;(tf:/vw d. Ignoring air resistance,

  06.18: A cart is initially moving xcedb(lybv5, i5btd -cd* w1 2at 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 does the cart travel before co *vi2c d,web(1xt-5byc dbdl5ming to rest?

  07.11: A cart is initially moving at 0 iloar,u /a73x.5 m/s along a track. The cart comes to rest afte7aai3/rxuol , r 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 the cart travel before coming to rest?

  08.03: A dog starts from rest and runs1 i*cta 8+ekw+:bg raa in a straight line with a constant acceleratikiw*ec+ t1b a agar:8+on 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 k/4ypx :vag08j -uc+lxt bq.sfalls without air resistance from a height h above the ground. If the ball falls the first distance 0.5h in a time t, how much time is required to fall the remaining distance of 0y vb .8 jg/ pcx4q-:+skta0ulx.5h?

  10.38: Two objects both move and uniformly accelerate to the right. At time ,xir- x mcm)yvx/ 03vpt=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 objectsp3yvx-x )0m mrx ,ic/v 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 th5b k7wlqi 9ep0 ibd00mrown horizontally with speed 10.0 m/s from a height H above the ground. The object reaches the ground with a speed of 20.0 5b weq 70 0m9piidk0lbm/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 straih4ge e 6f;;sqight 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 function ofg6eq4;hsie f ; time during its flight?

  14.03: An object is dropped into free fall. Through how many meters does thex(2zxse rg5dbn 4.),nl0urwwuz ga9 2 objec d,run9s2rx4x(w nw b2ag0lz)u5zeg .t fall during the first 3.00 seconds of flight?

  15.02: A box uniformly slides 7.50 m to rest acroshh2u(lq8 zk;ms a flat surface in a time of 12.0 s. Whathlqmh (z8uk ;2 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 mq-jwp(1yp-7pz i drrp:i w g +s)k(g8e/s in a time of 3.00 s. Through what distance does 1 (siwj8 i:yp-w(r)d q+pep7 pzrggk-the cart move in this time?

  14.16: A toy car iniubs6p 3 q 5+jsj 3*vbq/h4jpaftially 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 t jv4jq f/ja 5*+6h3uspqps3 bbhe 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 initiallyby/w3e33ur ic 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 the magnitude of the average acceleration of the car during the five second motioni 3uyb3w/r c3e?

  14.33: An object moves with constant acceleration starting wit4donuas(t e+. h 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 iniqlonv2a oi.v(g9a44 rtially is moving upward while in free fall. Which one of the following choices best rqlo4vrv4. a2g o 9ni(aepresents the direction of the object’s acceleration during its flight?

  13.26: An object moving oh z t ggmp4i;z+63yua8nly 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 tm6g4z38;yg+ai upzh 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 moving along a line completet/ ,b3 mf8u*j wuxy6hepay :6ws a 20.0 second trip with an average speed of 10.0 m/s in two stages. During xt6 uf6b /, *uaypj3:w8ewmhy 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 cli5m5zvsh6 00thg,uhktff, 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 5kh56ztumthg 0s0,hv 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-drivw /b;lpcoo h38ing car races with a robot. The robot accelerates p;/l3wbc 8oh oat $8.50\;m/s^2$ 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 verticalllf 8(nctk-/y 0etv u0ly 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 vertical position that is one-half of the maximum nlu/0ctey8(tvfk 0 -l height it obtains during its flight?