A ball is thrown downward from the top of a building wit2q(kahu1fr*1 v5hwj 6- kvwnc h an initial speed of 7 m/s. It strikes the g5u vw-awhk*r(1vnjf1c h 2qk6 round after 2.4 s. How high is the building?

  In Fig. below, what is the displa5g0wx (sjgpa) cement from 0 to 8.0 s?

  In Fig. below, what is the average acceleration fro mm 1;vksq3l*dm 0 to 8.0 s?

  Suppose a ball is thrown straight up, reaches av8-zn )rx- )hx wt)ybp maximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the btnzp yb )hr)w- )vx-8xall is going up.

  In Fig. below, what is the average aydst5.t *.zwn cceleration from 0 to 5.0 s?

  When an object is released from rest and falls in the absence 9rhul7s:+ ohc9xgbm0 of friction, which of the fr:x chb h l90mou97+gsollowing is true concerning its motion?

  An object is moving with co,)l e/1tqb hktnstant non-zero acceleration in the +x axis. The velocity versus time graph of thk)ebtq , /tlh1is object is

  Ball A is dropped from the top of a building. One second later, ball B is dr-raj,t 0i/8m4 pjq ftog+ui0fyc , ,uzopped from thez pfgy8trjiuf0 c, o u/jiq-4+t ,,ma0 same building. As time progresses, the distance between them

  Suppose a ball is thrown downward in the absence of air resistance. Make v9wjp -*jn5 ora statement concernjvpo*r n9w-5jing its acceleration.

  An object is thrown upward with a speed of 12 m/s on the sur) ,c8twgtgt y,-c+c1tu;mtthface of planet X where the acceleration due to gravity +ywt- tct8,ucmctg ;1 ttg,)his $1.5 \; m/s^2$. How long does it take for the object to reach the maximum height?

  Ball A is dropped from the top of a building. On;ath: kb*x9/vye0fo;jc iv- ge second later, ball B is dropped from the same building. As time progresses, the difference in thvjgvc;bo*a texh/; -y9fk0i: eir speeds

  A ball is thrown upward at a velocity of kk q.0lgbw4+c4on qfrk. tv.*19.6 m/s. What is its velocity after 3.00 br ngo40kl +w*c.4qvt.f.kk q s?

  The slope of a velocity versus ti ewioxpmal7xo6p /o3e)r9 8rcfh:7j8me graph gives

  In Fig. below, what is the average velocity from 0 to 6.y npqaf(de.k2lj/+ yn *xu5h10 s?

  The slope of a position versus time graph byxdj/ u puoqqx ) .l8.6sf1(vgives

  The area under a curveztkpb.vra f9.td ck5.(y0 py1 in a velocity versus time graph gives

  In Fig. below, what is the a co b6eo8 imtd;w 1.n7v,z:ighe0d: fb;khh)ecceleration at 3.0 s?

  When an object is released from rest and falls in the 5gty6wah qi.x1mf ;4.gj a8jj absence of friction, which of the folg qjwagy6x4.; t58 i1jjm.hfalowing is true concerning its motion?

  A brick is dropped from t8bp z3urh.dh3he top of a building. A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistanc33 ph.hbr 8duze. Compare the accelerations of the two bricks.

  An object is thrown upward with ai2 0je/t 5m4mem -psxn speed of 14 m/s on the surface of planet X where the acp 0is-te5mm x4 mjen/2celeration due to gravity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  In Fig. below, what is the velocity at t = xf89, kxez m8v5.5 s?

  If the position versus time graph c/9u. xrgmk00ctdy:vof an object is a vertical line, the object isdtr m0v/kyuc.9:c x0 g

  A bullet shot straight up returns to its starting poinm j6jimdoiaqlyd g 0. 5;;-9krt in 8 s. What is the initial speed o.im rq6ilkaojjdgy9 5 ;0;d-m f the bullet?

  In Fig. below, what is the velocity at t = 4.0 bub)i0).ngpt s?

  An object is moving with constant non-zero vc*wanjv+dta7v 7o * x9elocity in the +x axis. The velocity versus time graph of this ovw9 caj*dat vxn77+*object is

  An object is moving with constant non-zero velocity in the +x axis. The porjnch.z;).,f5 knbk qsition versus time ,c5rjkbfnnz k).h;q .graph of this object is

  A ball is thrown vertically upward wit7mu2pxbgj9z9z4ws 7 k h a speed v. An identical second ball is thrown upward with a speed 2v (twice as fast). What is the ratio of the maximum height of the second ball to that of the first ball? (How many times higher does the second ball go than the first u4bszxkg2 99 77mwj pzball?)

  If the velocity versus time graph of an object is aqg,0z t8vy4nr9o-e e g straight line making an angle of 30t-8z 9 ,e4q0yeogrnvg degrees with the time axis, the object is

  Suppose a ball is thrown straight up. Make a statement about the velocity andu1/lzk kpq6h.4;w) mp.zs vf q the acceleratipp4 wkf6 .hsm./zv;l1 kqzuq)on when the ball reaches the highest point.

  Suppose a skydiver jumps from a high-w +2/6 lqdjbbp ta4x3( thj-wqflying plane. What is her acceleration when she she reaches terminal velocitlx4q t3jt6 bwb(qhd2- a /p+wjy?

  The area under a curve in an acceleration i mk kvi+v,9 nv,6km 8oe7hfciz(qk.0 i5sci .versus time graph gives

  In Fig. below, what is the acceleras5dpk*c6qagg -b* .xg tion at 1.0 s?

  A foul ball is hit straight up into the air with a speed o+ zgawkpq d8vdk,+ 69yf 33.8 m/s. (use $g=10 \; m/s^2$, only fill in numerical value in the blank)
(a.) Calculate the time required for the ball to rise to its maximum height.  (数值)  $s$
(b.) Calculate the time for the ball to fall back to the height at which it was hit.  (数值)  $s$
(c.) Calculate the maximum height reached by the ball.  (数值)  $m$
(d.) Calculate the ball's speed 3 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 9 m above the point of contact between the bat and ball for the first time.  (数值)  $s$
(f.) Determine the time at which the ball pass a point 9.0 m above the point of contact a second time.  (数值)  $s$

  A ball is thrown straight up with a speed of 36.0 m/s. How long does it take to2ygp,m 3rtc2a :m t(fx return to its startp2 ct:tm2yxr a,3 fm(ging point?

  Human reaction time is usually greater than 0vclkfc3 -pmm/g-c s9 qz1la:x 0s/1hv.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fall befores11h:l/sc3v x-c mazpm-kcf/gl0v9q you catch it?

  In Fig. below, what is )uqwp j*82hnfrox6 e9 the average velocity from 0 to 4.0 s?

  In Fig. below, what is the velocity at t =a gp.vlc(3i9 g,je c5c 2.5 s?

  In Fig. below, what is the velocity at txo xoi o:78iw5 b2to3v = 1.0 s?

  Suppose a ball is thrown straight up. Whas y7jfxv)a0.ot eo 6o6t is its acceleration just before it reaches its highoso e7v66oj y.t0)a xfest point?

  If the velocity versus time graph of an ob5fe 2xx(u7pe,,xg zvl k /wgkjh) bd-2ject is a horizontal line, the object is fv(p-g kwulxx)7 /h2xk ,52ed,zb jeg

  An object is thrown upwardxz+ii) crmph4 c8 x4h( with a speed of 15 m/s on the surface of planet X where the acceleration due to gravity is+r cxpii z4h4h)cx8(m $2.5 \; m/s^2$. How long does it take for the object to return to where it is thrown?

  An object is thrown upward with a speed of 12 m/sp, norv +3:-z r3 ga8yklmto ma+pme-s.3o- ch on the surface of planet X where the accelera+-h3 3z.ecmgro8y,m+3-av an:opso trm- klption due to gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  Two objects are thrown from the top of a tall building. Onwjxhyqti5 3 e1sx26v,e is thrown up, and the other is thrown down, both w5w1e xv3 iyh6qt,sj2x ith the same initial speed. What are their speeds when they hit the street?

  A ball is thrown straight up, reaches a maximum height, then falls to itq(7 ulo,c) cf7wz:khx)gd 0xms initial height. Make a statement about the direction of thx, m)7:ku (x)d hwf7clozcqg0e velocity and acceleration as the ball is coming down.

  An object is moving with constant non-zero accelerain.zcbc,k ,.a tion in the +x axis. The position vcb in,..kzac, ersus time graph of this object is

  If the position versus time graph of an object is a horizontal line, the obqc29y0oad 2ghject 02qch9d og2ayis

  A ball is thrown straight up with a speed ox owd/8fi7c p-kyl2 -xf 30 m/s. (only fill in numerical value in the blaix/ fdyxpc2--lkw78onks)
(a.) How long does it take the ball to reach the maximum height?    $s$
(b.) What is the maximum height reached by the ball?    $m$
(c.) What is its speed after 4.2 s?    $m/s$