94.01: Starting from rest, objeov q yi.tr7+3w+a.o bp-tjos, ct 1 falls freely for 4.0 seconds, and object 2 falls freely for 8.0 seconds. Compared to object 1, object 2 fr3qvt yjb+wp+ 7, so.t-oo.iaalls:

  94.02: A car starts from rpl h3k39dw1hx ersq ffl.3yofe,0*m 1est and uniformly accelerates to a final speed of 20.0 m/s in a time of 15.0 s. How far does the car travele.h swff 1de0,k3 x1mrq3l39opfhy l* during this time?

  94.03: A ball is thrown off a high cliff with no horizontal velocity. It land2a*b 5y6t u 2fkylir(ms 6.0 2byrlu 5 mt6*(ayfki2 s 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 q m-2iyraia)sy;ta-9 ating vertically upward atqa yi;- im t)a-a2ysr9 $10\;m/s^2$. 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/s at one in2/c cy8yu y6p-6z2yviy.5ys /l+*znzix nrlrstant. If it continues to fall, one second later the object /ip. cixzzly8 6ysy6c-* /u2+2y5vryznn ylr would be moving with a downward velocity closest to:

  95.39: A car starts from rest 2htro2xs g c7/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 droppe wi0 (z2r4j :chxuvve-d from the top of a building strikes the ground with a speed of 30 m/s. Assume air resistance can vvuw4 jh0(e :rcxz -i2be ignored. The height of the building is approximately:

  97.09: At a certain time, an obpkh15 - yyb2hchch79gx5vl2pject in free fall has velocity 4.0 m/s in the upward direlhkg cc72h yyv ph15x59hb -2pction. What is the approximate velocity of the object one second later?

  98.14: How long must t,cbs96dj 8cra $2.5\;m/s^2$ 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 movingf +wme30:nshu downward at 18 m/s. If it continues to fall, two seconds later the object woulfeu m: hw30+nsd be moving with a speed of

  17.02: A small object is releas4z9 hi+ w2 (nph mwskp747p yd)nnde2led from rest and falls freely for 4.00 s until reaching the2ys nz7p)+kpnedihh4 lm27p w 4nwd9 ( ground. What was the height above the ground from which the object was released?

  11.06: A ball of mass =0.100 22zppqt*pm6 7.mqr uykg is launched straight upward so that it rises to a maximum height of 12 ump. 2p*2zymt 76prqq.0 m 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 =a-pk4r-jhoh(,i :;dq wl:d(tan (k fm0.100 kg is launched straight upward so that it rises to a maximum height of 12.0 m above the laukd h;arw,hfm j- dp(t: :-inl(ko(4aqnch 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 plane has -)/fc /+vqf2j qgvlllspeed 0.40 m/s two seconds afc2fq)-l+ljvfq/glv /ter it begins to slide. Approximately how far does it travel in three seconds?

  98.40: Coin I is thrown upward frb, wkh6rwcs*n 05*holom the top of a 100-m tower with a speed of 15 m/s. Coin II is dropped (zero initial speed) from w0 cho5,*k6b lr*hnsw 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 initial speed of azp p ldc93:chaa1tg: 3nother, how much higher will cpa t1d p:g3z:lc h9a3it be at its apex?

  02.30: A box falls to the ground from a delivery truck traveling atp5 re8djq7(+zpsf9wnb8z5sasy . um , 30 m/s. After8 (um,fwspeza98qj bnrdyp 7 zs+.5s 5 hitting 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 velocity ofd*0 o7 qa8fdna 30 m/s near the surface of the earth. After two seconds what would be the direction of thedo0dn 8fq*a a7 displacement, velocity and acceleration?
displacement velocity acceleration

  04.10: Three stones of different mass (1m, s ow9i7(vww0c/xjc z(dib8j dzoi06 .2m& 3m) are thrown vertically upward with different velocities (1v, 2v& 3v respectivel0c6idw ij/(c90wv 7( zwbsojiz8.o d xy). 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 objects07scaw1crc43 xj (lf:jftp).pnri2s are 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 xi j1 a4rssfc7 wcp fpn302)(lr cj:t.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 ew./qvrrf) )-kgqg3 u qach bounce, the ball reaches one-half the height of wq rrq)3f/vkgg) qu-.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 second and third bounce?

  16.21: At 1.94 s after launch, a projectile in freed mw)de9xal+g0l)30vr )oss t fall achieved its minimum speed during flight. If that minimum speed was 15.0 m/s, what was the projectile’s initial angle of launslamx3dog)0 d+) lerw0)9s vtch from the horizontal?

  05.02: A pebble is dropped from a high vertical cliff. The collision mb1kc,x8 c 2jwof the pebble with the ground below is seen 1.50 seconds after the pebble is dropped. With what speed did the pebble w,bm18cc j 2xkhit the ground? Ignore air resistance.

  06.03: Three students were arguing about the height of a: m,u pte*acr22zk uv41 fk(uy 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 balls. If the time for the ball to fall was 1.4 seconds2t1 k*r,ek vc(um: uy4f uaz2p, approximately how tall is the parking garage?

  05.07: A snail is moblzyx )kyr q1ak +(j67,pgg7oving along a straight line. Its initial position 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, initk6ryl+7jp1,yagxgzqk7 ( bo) ial velocity and acceleration, respectively, are

  04.38: A small point-like object is pulledh q8fs 6emrm+t+ pg:4n downwards by gravity (down the plane of the page) but is constrained to exactly follow e:rm+6gnte4m f8phq +sach 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 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 tall tow hw9xo6.i q8aper. Half a second later another rock, twice as massive as the first, is drop pa8 h6x.w9oqiped. Ignoring air resistance,

  06.18: A cart is initially movi oz,-d3:l 1n1 igibmjnng at 0.5 m/s along a track. The cart comes to rest after traveling 1 m. The expe 1-l:ig1d3jnibmz on,riment 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 cart comes yow 6 4:tlto3vto rest after traveling 1 m. The experiment is rep6vt3:lo4 yot weated 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 runs in a straind0m/h5; wjfnght line with a constant acceleraw5jm0fdn; h n/tion 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*0,/fnen5f w.kj ma mh(f6 a pnix3wh( 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 0.5h?inw nx0w(/6 k.fhafjh pm5(3am,n e*f

  10.38: Two objects both move and unexea*mf l k191iformly 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 tim*x kaf9e 11mlee 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 jvq1u6vs bac cu44cu+c-b .i*speed 10.0 m/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 choices best represents the time of the object’s flight to the ground? Ignore a-cs6uv.jcc4i 1 u ab+qc*v4bu ir resistance.

  13.10: An object is thrown straight upward. Thejvrwqpkk 85) *nie 3o2 object remains in free fall until it returns to its initial launch point. Which one ofji 8 vr k3)eoq*5npw2k 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. Thrpb g;3*fw g9qfrvpllu3 :v4 0ef9ojc,ough how many meters does the object fall during the first 3.00 seconds of flight?3c v, g99e0rfo w :p3v4bq;*fgfljl up

  15.02: A box uniformly slides 7.50 m to rest acro iokp1;nh7 by0ss a flat surface in a time of 12.0 s. What7;i 0b1hpnyko 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 fq7paoyzjrc3e / e/.-m/s in a time of 3.00 s. Through what distance does the cfrzjoaqe3.- ey /cp7 /art move in this time?

  14.16: A toy car initially moves to the right attc/t . q+qzf2d 60.0 cm/s. Five seconds later, the car is moving at 40.0 cm/s to th.cz q/t+fq2dte 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 to the right at 60.0 cm/s. Five sei0f293do gg,f dqxw(cconds 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 magnitu39, fq2 w cg0ddxgiof(de of the average acceleration of the car during the five second motion?

  14.33: An object moves with constant 7m56e4gjr:j*jde hvpc f+1g(g y:sin 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 i9r*mrw j10mkb g(qj-: i k6bhis moving upward while in free fall. Which one of the following choices best represents the direction of the object’s wq19(j6r mk-kirbgh0j:bim *acceleration during its flight?

  13.26: An object moving only to the oj8-5oej vhg7w:v*2 idzjg z(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 m/s for 12.0 seconds. What constant acceleration must the object have during the 8.0 secondj o *-dvz8j5v2hij egg7:zo( ws of stage II?

  15.32: An object moving along a line completes 82h2 zou +jg oylznh6.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 seconuzho+ zl28y.h26o gjnds of stage 2?

  13.33: At the top of a high cliff, a smal+8 m05x04 ssu-0qzwbzwa gf xvl 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 initially dropped rock, what is the speed of the ball relvg5 xm4zz8x+-s u b00wsfwqa0ative to the rock?

  16.36: On a straight road, a self-driving car races with a robot. The -*d zkjy)w bm9h afox:w-, as6robot accelerates atk*sbw6, xa w o:a)d-zmyh-j f9 $8.50\;m/s^2$ 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 upwapa bz9;pl0 6agrvj5*lrd. 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 height it obtains par596p*vzl0bg al ;j during its flight?