94.01: Starting from rest, object 1 falls freely for 4.0 ydui nlgy 9tm4 pne8m-+d;7hk5d.a *hseconds, and object 2 falls freely for 8.0 seconds.my yd 4l5igekhpn+tu7.d9*damh8- n; Compared to object 1, object 2 falls:

  94.02: A car starts from rest and uniformly acceleratt q68n,mhtna* es to a final speed of 20.0 m/s in a time *6m n8ha ,nttqof 15.0 s. How far does the car travel during this time?

  94.03: A ball is thrown off a high g*u7)fslc cxe36 r 8chcliff with no horizontal velocity. It lands 6.0 s later with a velocity of 40 m/s. What was the initial velocity of thc*slcfxrc 8 3eu 7)6hge ball?

  95.27: A rocket near the surface of the e7mkvl;y1ey9ol5v6 ap le3 u i;arth is accelerating vertically upward aa;u65l lvel9k;7 py1my i3vo et $10\;m/s^2$. 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 o4jb 4ef 2ptnifm6/ f7xdx f(927 m/s at one instant. If it con42tfijfxf(e7/m o f nx6pb4d9tinues to fall, one second later the object would be moving with a downward velocity closest to:

  95.39: A car starts from rest and accelerates at ywj,7 e1;zk am$0.80\;m/s^2$ 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 br3 w).o0urqx(/xknls uilding strikes the ground with a spee ko. 0wr)x3slnqr (u/xd 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 fall has velo/xkoc7 n o;2/m;b tekncity 4.0 m/s in the upward direction. What is the approximate velocity of the object one second laterxok; o/nem;b n2tc/7 k?

  98.14: How long must a htbsi )3s;1io$2.5\;m/s^2$ 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 dows6 l m,q+* maogotab05nward at 18 m/s. If it continues to fall, two seconds later the objec al+0baqm o5ms *got,6t would be moving with a speed of

  17.02: A small object is released from rest and falls freely 2z5xcq bhu7z9ca b qjj )-jbm6ja92e;for 4.00 s until reaching the ground. What was the height above tch 72c qzza6ux5bemjj;9bja 2 j 9b)q-he ground from which the object was released?

  11.06: A ball of mass =0.100 kg is launched straight1 8kgsreqth5 , 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 following choices best 8qehgtk s5 1r,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 rises totk.0x3lmn.+l imzt) m a maximum height of 12.0 m above tniz+ .k3 m. xlmmttl0)he 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 inkmk 8,lpb9hj/u/ dop+clined plane has speed 0.40 m/s two seconds after it begins to slide. Approximately how far does it trav ojdhp/pk8 lmbu/k,9+el in three seconds?

  98.40: Coin I is thrown upward from the top of a 100-m tower with a speeq;a;nri3,fb7l)a8 san wr g c2d of 15 m/s. Coin II is dropped ;a cb8 l;ni2r3fawg7,n r a)qs(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 uh;6tvel 0ni-82nl z :-tbzi9zvc.a lupwards with twice the initial speed of another, how much higher wilvlzuhbnti2 -z;:9-ae0zlc. t vi8 l6nl it be at its apex?

  02.30: A box falls to the ground from a delivery tyj.9ykoam k 50ruck traveling at 30 m/s. After hitting the road, it slides 45 meters to rest. Ho0m kay5ky.jo9 w long does it take the box to come to rest?

  03.29: An object is thrown upwards with a lx8btf xn/9j+ velocity of 30 m/s near the surface of the earth. Aftx8ft9n/l +bj xer 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)zpnf ;ldv.; f2k 9zn9qb6dbu6 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 air resistance is neglidf 2b. ;9fn 66dul 9;zknpbvzqgible.

  10.25: Two point objects are launched straight (xaixa h l*fen n78i55upward with identical 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 t ae7a if85n ixx5l(hn*he launch point in terms of H ?

  04.28: A rubber ball bounces on the ground as shown. Aftergzt2 f-cjw+8n each bounce, the ball reaches one-half the height of the bounce before it. If the time the ball was in the air be 8+2- czjfgtnwtween 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 projeeje m:+/li uwyot(u8 0ctile in free fall achieved its minimum speed during flight. If that minimum speed was 15.0 m/yu+wee:o/0ji8u(m t l s, what was the projectile’s initial angle of launch from the horizontal?

  05.02: A pebble is dropped from a high vertical clib42/2fo /amv 3mo.d *lc nqss3gmtva5ff. The collision of the pebble with the ground below is seen 1.50 seconds after the pebble is dropped. /g. 2s v3vm/ 3ba4*q5aloodn mcf2tm sWith what speed did the pebble hit the ground? Ignore air resistance.

  06.03: Three students were arguing about the ahj.uycp 2k5qr 363nzheight 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 th3c5nzyr2u3j ah qp6 k.e 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 posi*clx 6 f;,0u308i jz(r hovzj,tgizz ntion is x0 = -5 meters and it is moving away from the jzztohgc0 n ,;ul,zr j8zf(ii6 3v*0xorigin 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 (a j6qh* b;ija(ji4i8 idown 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 4qijhb8*6(j iijiaa;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 droppe 3/ h*v5v mvaz3 7heagk:nyr:xd from the top of a tall tower. Half a second later another rock, twice as massive as the firah* :3 va73vvnx/mzkhgy er5: st, is dropped. Ignoring air resistance,

  06.18: A cart is initially moa08t tn1ect uhm;0 c-hving at 0.5 m/s along a track. The cart comes to res ctt0cau; 01- tmnhh8et 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 coming to rest?

  07.11: A cart is initially moving at 0.5 q*56tgqxe isy7 0mz z:pjh+k 3rrr;(jm/s along a track. The cart comes to rest after traveling 1 m. The experiment is repeated on the same track,r*+s 5 p:3m7hzqk6y; rz(0qtj r xejgi 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 froo,spbn gy7- r,g0r) wzm rest and runs in a straight line with a constant accelerati,g)w ryno ,p7-0b rszgon 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 fallsg 5y bk5g;ct8(6kyaq w 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 requ5 kt ygy5kc b(8w6qa;gired to fall the remaining distance of 0.5h?

  10.38: Two objects both move and uniformly accelerate toky:xj+dog .n.p + dqq) 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. Aften :jqgqxp do+y .+.)dkr 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 with speed 10.0 m/s from a height H 3sa ltghvk 060above the ground. The object reaches the ground with a speed of 20.0 m/s. Which one of tha 0 0k3hvt6lgse following choices best represents the time of the object’s flight to the ground? Ignore air resistance.

  13.10: An object is thrown straight upward. The obrz5 e4a quha;p 5x6b0hject remains in free fall until it returns to its initial launch point. Which oarz64ea5up h0qx ;b 5hne 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 fall. Throug: jni3kpl,f7g h how many meters does the objeci pfj37:,lg knt fall during the first 3.00 seconds of flight?

  15.02: A box uniformly slides 7.50 m to rest across a flat :,zb7 a6kiczq surface in a time of 12.i z76q,b:kzac0 s. 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 noq(,l) m1nc,gmm f1 wjl:m,y,so2q u of 7.60 m/s in a ,gmnflsmomlw(2 qc,1o,u m:,jy)nq1 time of 3.00 s. Through what distance does the cart move in this time?

  14.16: A toy car initially moves to the right at 60.0 cm/s. Five secokyj*pradv(.(i han.xotkhv5(d zw174. m7df nds 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 velocitr f.7 yjwkdxn(p dav(hvd7. i m5*h.ztoa(14ky of the car during the five second motion?

  14.17: A toy car initially moves to,zj +,f(mrcok rlv 3w1 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 tijw1l z (mkf +o,c3r,vrme 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 const506( dy tnz-ir/oqrdr ant 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 .f 0/ikmc5uck du, p0pmoving upward while in free fall. Which one of the following choices best represents the direction of the object’s acceleration during its flight?ipkcu,pu /f 5.d0 m0ck

  13.26: An object movingk 8k( qp,)thlm only 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 m/s for 12.0 seconds. What constant acceleration must ttm(,)l8k khqphe object have during the 8.0 seconds of stage II?

  15.32: An object moving along a line completes a 20.0 second trorh) 8kj6i19c9:;gee 7 lke bjgkru p;ip with an average speed of 10.0 m/s in two 7 chrbekp16ug oe :k 89e9j;)jlg;irkstages. 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 seconds of stage 2?

  13.33: At the top of a high cliff, a small rock is droppe pi:p9u cmh,f*d 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 p hcp,if* mu:9relative to the rock?

  16.36: On a straight road, a sel,fjxb4yu j*cckf*oh )8/yp 8zf-driving car races with a robot. The robot accel,ypu8j bzkx /f8 f)jy*4occ* herates 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. The v -g-kd um1 y ijr(dim:0) p/rm(fjoe)lertical 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 maximumodrmur1)yd/i:kjl--ig) mje( ( m0 pf height it obtains during its flight?