If the velocity versus t-nhod/ 9,bky time graph of an object is a straight line making an angle of 30 degrees with the time axi o,9bh/ykt-dns, the object is

  Suppose a ball is thrown straight up, reaches a maximum height, then fallsv, 28huxtutb; to its initial height.2 8 tvbuxh;tu, Make a statement about the direction of the velocity and acceleration as the ball is going up.

  Human reaction time is usually g0 ,gpv -2einapb( g3xoreater than 0.10 s. If your friend holds a ruler between your fingers and releases it witgp, 3p vib-o(ga 2xe0nhout warning, how far can you expect the ruler to fall before you catch it?

  A ball is thrown straight up wif yq)k-aw -lce 80lx5oth a speed of 36.0 m/s. How long does it take to return to its8a k-f 0yxq)c l-eolw5 starting point?

  A ball is thrown downwa9ora oso (kh41rd from the top of a building with an initial speed of 12 m/s. It strikes the ground after 2 rs(h4 ao19ook.0 s. How high is the building?

  In Fig. below, what is the displacement from (ek3:p 7gtcb n0 to 8.0 s?

  A bullet shot straight up returns to its starting point in 17 s. 4i/xz0fcrc. jWhat is the initial speed of the bull x0. ifr4c/jzcet?

  In Fig. below, what is the average velocas : at lczgd9xp8xqu42y:(+r 1oh:gyity from 0 to 4.0 s?

  In Fig. below, what is the average velocitybqq)lyyl r4 /imiw.f a82g 6.b from 0 to 6.0 s?

  In Fig. below, what is the velocity at t = h/fonrb9 fl 3wz dpc ,74,yqj95.5 s?

  Suppose a ball is thrown downward in the absence of air resistance. Make a s s3ji;0 ejq)ej75au rqtatement concej7 0s3ju;ae jqriqe)5rning its acceleration.

  In Fig. below, what is the average acceleration from 0 towb2;icpxs9y / 5.0 s?

  A ball is thrown straight up with a speed of 30 m/s. (orip+l3vtj7r 1k, 9 iwwnly fill in numerical value in the blanrpi t 7l9,w+ rwv31ikjks)
(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?    $m/s$

  Two objects are thrown from the top of a tall building. One is thrown up, and b45 zy1:oenhc08a qos the other 0bq aes4nz :ohy1co58is thrown down, both with the same initial speed. What are their speeds when they hit the street?

  An object is moving with constant non-zero acceleration z.1qn)s x.s 6bn4oifw in the +x axis. The position versus i 4bnsfx 1wzq.n. )6ostime graph of this object is

  In Fig. below, what is the v3.a yl) ;vzbu*f38toqbra +drelocity at t = 2.5 s?

  The area under a curve in an acceleration versus time g-itg nm 39;n(pvhfoz 5raph gives

  A brick is dropped from the top of a building. A second briepsmn s-)8z5mck is thrown straight down from the same building. They are released at the sam-senz s 58p)mme time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-z8xz-s tc5:k;vn1jbftg g8 m-jero acceleration in the +x axis. The velocity versus time graph of zbgk mtv1f8 sjn ;gc5j: 8-t-xthis object is

  An object is thrown upward with a spa51ia0n4c+fcd o5g aheed of 15 m/s on the surface of planet X where t5o5d c1nh0aafic +ga4 he acceleration due to gravity is $2.5 \; m/s^2$. How long does it take for the object to return to where it is thrown?

  In Fig. below, what is the acceleration at8:o v.3 c63v*yf 1d2enib litr8czbyx 1.0 s?

  Suppose a skydiver jumps from a high-flying px(zvn 6- m(atplane. What is her acceleration when she s6 xnm(-tzpv( ahe reaches terminal velocity?

  An object is moving with constant non-zer(pwo. oo*oce4o velocity in the +x axis. The velocity versus time graph (ow .po* o4ceoof this object is

  An object is thrown upward with a speed of 14 m/s on the surfacgs8 :xsfrh.j, e of planet X where the accef :,h8s.jsg rxleration due to gravity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  A ball is thrown vertically upward with a speed v. An identical second bamro ej:y 6*6yft3yg :rll 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? (Howfmty6y6yo:* e:j rg3r many times higher does the second ball go than the first ball?)

  If the position versus time graph of an object is a vertical line, the objewr4t pn+d3zg( 76ce1eb4mszf ct is7erpb +z mg4sct wd(14ef6z 3n

  In Fig. below, what is t(+ y,ex; o,i p3gwagug+yv*u.bg og0hhe acceleration at 3.0 s?

  If the velocity versus 9wo*tm tku ut5wa r12rw0 m*u7time graph of an object is a horizontal line, the object is*1wtu5w0o*k7 wmtuu 9r2r mta

  In Fig. below, what is the 7,w(aod+auquh3l )v wenm/- baverage acceleration from 0 to 8.0 s?

  When an object is released from rest and falls in txxo0u(d9* .k u nq/obohe absence of friction, which of the following is true concerning its mot o.kbuxu onoqx/*9(d 0ion?

  In Fig. below, what is the velocity at t = 1.0 sfq) 9 fb t6 2 qdzbf--9mqj3qt6des*ll?

  An object is thrown upward with a speed of 12 2:,rmbru e 1*m.eqwp)bis0 r.f jd1c om/s on the surface of planet X where .mb,erpbre u2: d1s orc* if0q.1m jw)the acceleration due to gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  The slope of a position v9*2o tmw,buz:fi o9c- ov p+ugersus time graph gives

  In Fig. below, what is the veloci3tf7l 5t8vos vty at t = 4.0 s?

  An object is moving with conblz+bd y2k;9b6vz 9wystant non-zero velocity in the +x axis. The position versus time graph of this objd9 zzy6w+l y b9kb2;bvect is

  If the position versus time graph of an object is a h5t7 6a r) dghcw9gh.dxorizontal line, the object isa5 7r6td wgc).d g9hxh

  When an object is released from rest a c w1.bljab3o:nd falls in the absence of friction, which of the following is true concernwbb :31c al.joing its motion?

  Ball A is dropped from the top of a building. One qzj8xh0 ty.08y2 lcmw mrx )d6second later, ball B is dropped from the same building. As time progresses,rxj08y h6)z ld0wm. q2x tmy8c the difference in their speeds

  Suppose a ball is thrown straight up. What is its acc2njdng4rp.xv3 rsm ,( eleration just before it reaches its highest .s,d3gr2( p4nrj mnxv point?

  The slope of a velocity versus time graph givesz1qv5d6kxall.vb-+cdc fv04 9u+ a ul

  An object is thrown upward with a speed of 12 m/sp qa) 4f:4room on the surface of planet X where the acceleration due to gravit o4q4oaf):mrpy is $1.5 \; m/s^2$. How long does it take for the object to reach the maximum height?

  A ball is thrown straight up, reaches a mpz )nj n4e.at6ue-tf. vn/)te aximum height, then falls to its initial height. Make a statement about the direction of the velocity and nz a4.ep)en-6.etu f) j/ntvt acceleration as the ball is coming down.

  A ball is thrown upward at a velocity of 19.6 m/s. What is itnkfp4w+ 8k5qb-df1zt .dim3 6wy vd7 es velocity after 3.00edkzv t7fi3w15w6+f.-qby8 nd md k4p s?

  A foul ball is hit straight up into the air with a spe s5mccxv(k8sly :wq,/v-.foqed of 20.2 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)  $s$

  Suppose a ball is thrown straight up. Make a statement about the vg3awvk ( *rz qyaw+,p;elocity and the acceleratv , kw*r+yaq3( ag;wzpion when the ball reaches the highest point.

  The area under a curve in a velf.kanpt); 5 jjocity versus time graph gives

  Ball A is dropped from the top of a building. One secony 3bex44h*go r543h) eoi sgnld later, ball B is dropped from the same building. As time progresses, the distance 4x 3 34rhhsl*gn5y o)geoi4bebetween them