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习题练习:Physics Bowl by Topic 4: Kinematics - part III Projectile Motion



 作者: admin   总分: 23分  得分: _____________

答题人: 匿名未登录  开始时间: 24年04月06日 08:39  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.14: An object moves tk p fc 7f22 u1h:x3duhrw7xr;wx5rizp7do/v5 o the East across a frictionless surface with constant speed. A person then applies a constant force to the North on the object. What is the resulting path that the object takes? A. A straight line path partly Eastward, parfwrfir uc1;o5x:zpkdr 5/ phwh7xu73 d2 72 xvtly Northward

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.15: Two identical mass objects g)z353 b bgmfqmhj2zq0 ai:f9 are launched with the same speed from the same starting location. Object 1 is launcgqma9f302bgf35qzm:j bz h) i hed at an angle of $30^{\circ}$ above the horizontal while Object 2 is launched at an angle of $60^{\circ}$ above the horizontal. Ignore air resistance and consider the flight of each object from launch until it returns to the same launch height above the ground. Which object returns to the starting height with the greatest speed?

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.16: Two identical mass objects are lauq 4turycb5 41x+shx7zuq,7xq)g od w 7nched with the same speed from the same starting locat,5z7dcxu+477tx1gos yqr bqu)q 4x whion. Object 1 is launched at an angle of $30^{\circ}$ above the horizontal while Object 2 is launched at an angle of $60^{\circ}$ above the horizontal. Ignore air resistance and consider the flight of each object from launch until it returns to the same launch height above the ground. Which object experiences the greatest change in the linear momentum?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  94.14: An arrow is aimed horizontally, directly at the center of a target 20 m rd1f7 )q- )68szib dwqhu:tw6a/rhe yaway. The arrow hits 0.050 m below the center of the target. Neglecting air resistance, what was the initial speed owiz/7 hh6 81b)sar ruedyt6q:qw-)dff the arrow?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.05: Two arrows are launched at the same time with the same speed. A at an anxm ,iq8ye9q7 xgle greater than 45 degrees, and arrow B at an angl ,qe7mq9iy8xx e less than 45 degrees. Both land at the same spot on the ground. Which arrow arrives first?

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.19: A baseball is thrown horizontally from a cliff. At the same instant, a bogi.4x9)demsa olw93w5yiwj:wling ball is dropped from the same height. Assuming air resistance can be ignored, which of4es95yol3 gwmawi) dix:. w9j the following statements is correct?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.08: A ball is rolled off the edge of a horizontal table. The b) +r7g2m bitw1k mwc1e3cuw1 aall has an initial speed w7w wm2)m+1 tarc3i1cebguk1$v_0$ and lands on the floor some distance from the base of the table. Which of the following statements concerning the fall of the ball is FALSE?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.36: A ball is thrown ehx49pu 9nfgw29x1k tvertically upward with an initial velocity v and an initialwp2x gfnh 9ue9x4tk9 1 kinetic energy $E_k$. When the ball is half way to the top of its flight, what is its velocity and its kinetic energy respectively?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.37: During a recent winter storm, bales3l uvuf;yjyw21vm3gebk:3 2l of hay had to be dropped from an airplane to a herd of cattle below. Assume the airplane flew horizontally at an altitude of 180 m with a constant velocity of 50 m/s and dropped one bail of hay ef ge3;y1vjlm:3 wkv u2 ubl32yvery two seconds. It is reasonable to assume that air resistance will be negligible for this situation. As the bales are falling through the air, what will happen to their distance of separation?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.38: During a recent winter storm, bales of hay had to be dropped from an air 6c0-qu(;h jibl/yas mplane to a herd of cattle below. Assume tj 0 (;lhac/-qs6u biymhe airplane flew horizontally at an altitude of 180 m with a constant velocity of 50 m/s and dropped one bail of hay every two seconds. It is reasonable to assume that air resistance will be negligible for this situation. About how far apart from each other will the bales land on the ground?

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.14: A football is kicked a distance of 50 yards down field. Neglectinga/jvu5; qvxiywk yte+-2 *2jg air resistance, which of the following statements would be INCORRECT when the *e ;v2wuty-aj/kg2vj q x+5iy football reaches its highest point.

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.10: A ball is thrown into the air at at kn0 3+gdn/a2vry)gjzeq87*phbu , un angle $\theta$ as measured from the horizontal with a velocity $v$. The horizontal velocity of the ball will be directly proportional to which of the following

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.35: An arrow is shot horizontally toward a target 20 m 01r(:+p(djjc gnm;s/ bgufpdyh5 i ;waway. In traveling first 5m horizontally, the arrow falls r d ;h wb10 p;+:mn(5ju(siyjdgcgfp/0.2 m. In traveling the next 5 m horizontally it will fall a additional

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.04: An arrow is shot from a bqa9 ts8 pih*:xow at an angle of $40^{\circ}$ from the horizontal at a speed of 24.0 m/s. Ignoring air resistance, what is the arrow’s maximum height above its launch point?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.20: A projectile la-:-q cbffxa7n1u +. x rhzhl3)ec/akmunched from the ground landed a horizontal distance of 120.0 m from its launch point. The projectile was in the air for a time of 4.00 seconds. If the projectile landed at the same vertical position from which it was launched, what was the launch speed of the projectiz1 7ckcufb)e/ h 3 lr-fx.q+a:hm-xanle? Ignore air resistance.

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.14: A small ball is thrown at an angcthhe+cdrs :ea6g co 27 4*vtel4m.u2le of $30.0^{\circ}$ above the horizontal ground with a speed of 20 m/s. To what maximum height above the launch point does the ball rise during its motion? Ignore air resistance.

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.43: A small 1.0kg mass is launched from the top of v+mt5te.7uh(vsvh 6* bpo(dfa cliff with speed $V$ at an angle of $30.0^{\circ}$ above the horizontal. When it reaches the ground, its velocity is directed at $45.0^{\circ}$ below the horizontal. Which one of the following choices is the magnitude of the total impulse that was imparted to the mass during its flight? Ignore air resistance.

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.09: The free fall trajectory of an object thrown horizontally fmol2ab5r6,ari o2 x+urom the top of a buildim rli5 2o+ua,b o2rx6ang is shown as the dashed line in the figure. Which sets of arrows best correspond to the directions of the velocity and of the acceleration for the object at the point labeled P on the trajectory?


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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.41: A person throwswk/gzl8t 25cf a small object from the top of a building at an angle of wkl2c8 ftg 5z/$30^{\circ}$ above the horizontal. At the instant that the object returns to the same height from which it was thrown, at what rate is the speed of the object changing? Ignore air resistance and let g be the acceleration due to gravity.

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.21: An object is launched from the g(eux:)av 0do7 (n)e*z 8f f w/qfthp5gpylh1 zround at an angle of $60^{\circ}$ above the horizontal with a speed of 20.0 m/s. What is the magnitude of the average velocity of the object from just after launch until it reaches its highest vertical position during flight?

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.41: A small object is launched 30° above the horizontal from ae5*aq58a 7ou6 ua6 vehn/ord f height of 10.0 above the ground. If the initin75ho6v 8fqaa e r*ae6/uo d5ual speed of the object is 15.0 m/s, at what angle below the horizontal is the object moving when it reaches the ground? Ignore air resistance.

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.32: A projectile is launched at an angle of 40° above the horizontal with apm2 +-iit8xhx+ro.e/rltqt-i c1 ld( speed of 30 m/s . How much time passes beforet8 xro1lpd/+( +il-mqi c2 xerti. -ht the position of the projectile makes an angle of 20° above the horizontal from the original launch point?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  14.40: A small 1.35-gram mass is launched from the to3.g k tpj::6ku;:zn pzydvb .cp of a cliff at an angle of jbpkztc6 v:n .:yukg;z3d .p:$15.9^{\circ}$ above the horizontal. When the mass reaches the ground 4.33 seconds later, its velocity is directed at $34.4^{\circ}$ below the horizontal. What is the speed of the mass when it reaches the ground? (ignore air resistance)


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