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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 to the East across a frictionless su/ nyed,h-uar 7*ndlqt;8: v02ww;r zshzlu 2vrface with constant speed. A person then applies a constant force to the North on the object. We8dsl,z v2nl a*7t/n-uuh;wvw qy h:zr20d r;hat is the resulting path that the object takes? A. A straight line path partly Eastward, partly 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 are launched with the qfb xp 9yg *imafb 3r4eu+(,*psame speed from the same starting 9b3mye, rupfpaxb* f*g( 4+q ilocation. 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 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 launched wij)le, 3o5hxksth the same speed from the same starting location. Object 1 iso5elkh3 x,j s) 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 cp 9nahux g:ex0zfb 888enter of a target 20 m away. The arr0n8ap8:g h9z8xuefbx ow hits 0.050 m below the center of the target. Neglecting air resistance, what was the initial speed of 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 sam,apf0,5pkmixh4) pen e speed. A at an angle greater than 45 degrees, and arrow B at an angle less than 45 degrees. Both land at the same spot on0 pf4 xk)a,5eph,impn 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. pyz g;9h3mwk p dp52qgg32vx from a cliff. At the same instant, a bowling ball is dropped from the same height. Assuming air resistance can be ignored, which of the f2dpmxghw. qkp3; g5 gzp3y2v9ollowing 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 t2 mcm lok.sx,,able. The ball has an initial sp ,km.2xcl, omseed $v_0$ 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 ver;oqbl9,g bnu4 es :g7dtically upward with an initial velocity v and an initialbqlung g b47: s,d9oe; 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 winte yrxjdk;5) 0rgiouq/5 r storm, bales 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 every two seconds. It is reasonable 5 5rjy ridg)0/;okx uqto 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 fckd4r;aq5 zw 2rom 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 every two seconds. It is reasonable to assume thatr4q2c;k aw zd5 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 fidw.arsi,r911 eso ; kveld. Neglecting air resistance, which of the following statements would be INCORRECT when the football reaches itsd w.eksrrv9io;a11 , s 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 c3nfqf0de k5ha0 n7 zy:sqvxok/ 9;b;at an 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 away. In travfe w4*7 )3v hldyt2zx6z70feab . wkyweling first 5m horizontally, the arrow falls 0.2 m. In traveliw * df k4h)tvwyb zx7zfa6wlye3e0.72ng 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 7ecum l7 (w2l3a8imyct *bsx*from a bow 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 lauud606eaah9q tnched 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 projectilee0a t6dq9au6h? 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 a8xg0aq6o 9 vket an angle 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 6ue w i1b5t.gllaunched from the top of a 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 5vm7okn-.2bmg do4 vp horizontally from the top of a building is shown as the dashed line in the figure. Which sets of arrows best correspond to the directions of the velocity and of theo. mbm 5-dgk7 2vp4vno 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 throws a small object from the top 6gr, z:t pew:cwhhw9*ll r .5cof a building at an angle of 9w*prg ,6ec t zhlh.ww::r5lc$30^{\circ}$ 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 fr :73k2j1vk(.rkw v, fr ,1sbi jyqlqmbom the ground 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 launchfvz(pls :th/v f 6)5mfy2;qzy ed 30° above the horizontal from a height of 10.0 above the ground. If the initial speed of the object is 15.0 m/s, at what angle below the horizontal is the object mom 5 (ytvq :2fvyfsp;/zh6f)z lving 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 o5lk b5:g+oxabf 40° above the horizontal with a speed of 30 m/s . How muchox 5lkab:+b g5 time passes before 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 top of a cliff asdib)+t e+-bq.pb k)ut an angle of+ .)dpi e+bk)ubtb s-q $15.9^{\circ}$ 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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