94.01: Starting from rest, object r 3o)gaj xy66q1 falls freely for 4.0 seconds, and object 2 falls freely for 8.0 seconds. Compared to object3j)y 6arogxq6 1, object 2 falls:

  94.02: A car starts from rest and uniformly accelerates to5ia;2p-pnnt;v k10kp xhw3q b a final speed of 20.0 m/s in a time o x5-3ai nt qkpkp;p 1n2;v0hbwf 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 ve b/.kj t* 2id5lopu/zqlocity. It lands 6.0 s later with a velocity of 40 m/s. What was the initial velocity ofjokl tdi. z/uq25/*bp the ball?

  95.27: A rocket near the surface ofvi):n e82 qg e2ibjmft, whk(8 the earth is accelerating vertically upward a,g82ehbi2i)n8qkfm(evwt : j 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 found to be movv 8o0u cab;0 pwdd)+jt;3f knving downwards at 27 m/s at one instant. If it continues to fall, one second later thfa )vcj ;;pwk+d0bvou380 ndte object would be moving with a downward velocity closest to:

  95.39: A car starts from rest and accbel;0n qu;4 mx8x+ ofqelerates 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 buildie1 w4l *ejq8ktd3of) wng strikes the ground with a speed of 30 m/s. Assume air resistance can be ig1e tdwwqlj)4efko38 *nored. The height of the building is approximately:

  97.09: At a certain time, an object in free fall has velocity 4.0 m/s in the upwnt w u10l:c*zx.5jsul u l78kkard diz 7lwn ku jutkx 8ul*.lc5s1:0rection. What is the approximate velocity of the object one second later?

  98.14: How long must ak7ht0zb e cr+9bdi7o 9 $2.5\;m/s^2$ acceleration act to change the velocity of a 2.0 kg object by 3.0 m/s?

  98.15: A freely falling objec hwe/.,-y hcgct is found to be moving downward at 18 m/s. If it continues to fall, two seconds later thec,yhw .-gh c/e object would be moving with a speed of

  17.02: A small object is released from rest and falls freely for 4.00 s until rew a,6ptkw4+) yzh9n fhaching the g + 4kwha6n9zy ,w)pfhtround. What was the height above the ground from which the object was released?

  11.06: A ball of mass =0.100 kg is launched straight upward q3jdrpi s-;;vso that it rises to a maximum heigh;rd iqp;-v j3st of 12.0 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 =0.1006hk2 qgg1 0cku kg is launched straight upward so that it rises to a maximum height of 12.0 m above the launch point. Igno 6ukckhgq20 g1re 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 incw9mnh p0;t-k-zn 7 d eaa3w6owlined plane has speed 0.40 m/s two seconds after it begins to slide. Approximately93hon6 p;n w0akeadz7-wmw-t 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 s:pzfw o1zu/u 9peed of 15 m/s. Coin II is dropzp:9o/wf zuu 1ped (zero 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 twice the initial sps, ru3rnx7w- yeed of another, how much higher will it be at itsrx3 uwy7n -,sr apex?

  02.30: A box falls to the ground from a delivery truck traveling at 30 m/s. Afteva0c8hy5 yy.d j,bmv68/ bguhr hitting the road, it slides 4 d5v yb8ym8ahu 06cvh.,g jy/b5 meters to rest. How long does it take the box to come to rest?

  03.29: An object is thrown upwards with a velocity of 30 m/s near sw4 *jo,,*cfy lyp xx5the surface of the earth. After two seconds what would be the direction of the displacement, velocity and a jyx*,fo*c4 yws,lxp5cceleration?
displacement velocity acceleration

  04.10: Three stones o kox6g35phw ze3t7o.d x8x 2nyf different mass (1m, 2m& 3m) are thrown vertically upward with different velocities (1v, 2v& 3v respectively). The diagram indicates the mass and velocity of each stone. Rxt7 xn6.x odyk2e85 w3g3zphoank from high to low the maximum height of each stone. Assume air resistance is negligible.

  10.25: Two point objectsow29js-t;yh j y( qu:d are launched straight upward with identical linear momentum. Object 1 has mass M and reaches a maximum height H above the lt o :y ywdsj;-(u2h9qjaunch 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 groux z0*e3db (mqend as shown. After each bounce, the ball reaches one-half the height of the bounce before it. If thed0e (q3*exzmb 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 iro( o 0uj-;f vg3wuzx2ts minimum spee(-o u;2xvg0j 3fuwoz rd during flight. If that 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 c(1u020c hall( wzgnt59fkj f- 7lzntn hu-p0oliff. The collision of the pebble with the ground below is seen 1.50 seconds after the pebble is dph( k2 oz-nujltcw 0l709f th-lua zn 5f0(1gnropped. With what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about the height of a pard +79jjc .*kvlrx+ lwxking 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 seconds, approximately how tall is the d+jx*xl.+9v c7 krjl wparking garage?

  05.07: A snail is mov/ vzl/n-rn08q sqmi)r ing along a straight line. Its initial position is x0 = -5 metemrnl/8 sirqz- 0v/)qnrs 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, are

  04.38: A small point3 7d8ir l c)u7dsbz 96jx-chkd-like object is pulled downwards 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 (d z br9ls36 cx8kiucd-d77)hj 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 tower. Half a secoyj/w::n b0ma :dn beu+nd later another rock, twice as massive as the first, iswj/0:meb nybnu:+d:a dropped. Ignoring air resistance,

  06.18: A cart is initially moving at 0.5 m/s along a track. The cart comes ,r3q2fyn u7kj to rest afteq2 ,nkjf y37rur 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?

  07.11: A cart is initially((omq:pe,fsr moving at 0.5 m/s along a track. The cart comes to rest after traveling 1 m.e fosp,:(mr(q 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 runs in a straight line with a const754o(bld4q6 t lttguo ant acceleration ofltu4bg tqo6otl4 (d5 7 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 r3*fvw wkq d)6eest falls 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 distanced)w6*3fvek w q of 0.5h?

  10.38: Two objects both move and uniformly accelerate to the right. At time t=0,p7y6ltbiycsla1 v+c/uv6+z 6yg 4w :ithe 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. Whv61tipl66y7+4 cguyilb s z/a+wv: cyat 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 speed 10.0 m/s from a height vh x5ekt-(7s jH 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 o-j (7kse htxv5bject’s flight to the ground? Ignore air resistance.

  13.10: An object is thrown straight upward. The object remains in free f+4no,6s riljr 2 l,69h pzxfkkall until it returns to its initialh ,+ or6sjp4,kkzr f2llxn9i6 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 fk) 4.b x7tzzohall. Through how many meters does the object fall during the first 3.k.)4z txo7zb h00 seconds of flight?

  15.02: A box uniformly slides 7.50 m to rest acr.:ti96z jgqv goss a flat surface in a time of 12.0 s. What was the i gv:qz6 ig9tj.nitial 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/3z, m yq+oyt-bs in a time of 3.0y,bz +yq-o3mt 0 s. Through what distance does the cart move in this time?

  14.16: A toy car initially moves to the rilg-o9 ,.o ;c2pmrcg3 zqq ydu0ght 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 choic3.ud,cgc2o g0ql-y9 rozmq;p es 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.ci)r d:q:b 3. hvof6sp Five seconds later, the :i:o.h vsp) 6fdqbcr3 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 qtrdi6n5n;ve4 y(i )n 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 whilekf1w hg1bj ;8m o3hy/u in free fall. Which one of the following choices best represents the direction of the object’s accmo1 j/3 yh;1b8gwuhfk eleration during its flight?

  13.26: An object moving only to the right completes a 20.0 second tr tl+tn;ht8h3*cmkc q2ip in two stages, I and II. The average speed of the entire triptt;c c8tn+lh2q h3m*k 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 seconds of stage II?

  15.32: An object moving along a line compl(ebd-x*kyzifb xvsz j l 194r9b2nx :-etes a 20.0 second trip with an average speed of 10.0 m/s in two stages. Dur*kbi- xsx9(v4rx9 bz-n1f jy 2edlz:bing 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 cliff,el7l rrz3bi+ 6 a small rock is dropped from rest. A ball is launched straight downward with an in7br3il6r+le zitial 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 road, a self-driving car racesk:hok9jc5cqm5r8ro l ( : ::yiha/trp with a robot. The robot accelerates a:r:toa i/moc5yl5(q h 89rkc p:rhkj:t $8.50\;m/s^2$ 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. The vertl/04,8l+yt qu iwxbjmical position of the ball 0.70 s after release is the same as its vertical position 4.10 s after its r lbl+/xui mqw8t0 4jy,elease. At what time is the object first at a vertical position that is one-half of the maximum height it obtains during its flight?