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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 surface with constantfu q k n2vd2o)z4kmt- 3*xe6vlm+ wjl/ speed. A person then ap3 *m-k2dq 4lvtwxf)m2/ zo6ev+knu jlplies 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, 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 same speed frin d 8:trgn-j- kb:ov ;v by+1kjrgv68om the same starting location. Object 1 is launched at an angld-g; - rjbbg1+krk vtn:oi68y:8 nv jve 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 with the same speed from the s 7yn4saj lc2: st*8cbzame starting location. Object 1 is launched at tjyszs cn248b:al*c 7 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 va ep9y6kq.1zv8d ;e.c w2hgztarget 20 m away. The arrow hits 0.050 m below the center of the target. Neglecting air resistance, what was the ihvwz ye.8qdg;a.2v kp9ec61 znitial 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 tbe3z 7ky .s 0thrl:tx-he same time with the same speed. A at an angle greater than 45 degrees, and arrow B at an angle less than 45 degrees. Bohb. kr-yls t3 0ez:7xtth 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 thrg umv 19btbl03y,/ly1bkbgv3own horizontally 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 following statements is,g1g3t kb1ly u3/ b9b0bm yvvl 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 table24/f i hfi1 +jw(uwnoa. The ball has an init/j 4fw h(n12+fwauoi iial speed $v_0$ 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 vertically upward wit eu8y51w euobs63ac m1h an initial velocity v and an initial kineu 51s63ceeaomwy1u8 btic 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, bales of hay had to be drop s - qc;/qnc/1bedml,cped 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 to assume that air resistance will be negligible for this situation. As the bales are falling through the air, what wib-/nl qcdq, 1;mescc/ll 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, bal-xo.l4t m 0iahes 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 to assume that air resistance will be negligible for this situation. About how far apart from each other will the bales land on the groiox0 ta.4lh m-und?

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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. N/yny.odt2v r2eglecting air resistance, which of the following statements wouldoty d/y2v n.r2 be INCORRECT when the 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 thro9ddf0+ ux6c fb9h0 islwn into the air 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 toyjc5cacv3t67;f-ma / rl-xh vward a target 20 m away. In traveling first 5m horizontally, thea3rxj6cmc7avl;y /-c5 ht-fv arrow falls 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 boe+:n/eghh8s o w 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 launched from the ground landed a horizjs;;mlfc0bk8 vad :b.ontal distance of 120.0 m from its launch point. The projectile was in the air for a time of 4.00 seconds. If the k l;sdmfc v.0:jb8b;aprojectile landed at the same vertical position from which it was launched, what was the launch speed of the projectile? 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 angle9eb/zxos(q7m)h3aluv u/k 6 t 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 a cliff with sp. 4tph(xecg7j 7ve9 9w4ds th kzv8rtiux/b;,eed $V$ 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 horizontalfn2l2f2 xjtbt1. i*pyly from the top of a building is shown as the dashed line in the figure. Which sets of arrow t2f1f p j2iyx2tn*.lbs 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 throws a small object from the top of a building at an *1tsyj.r/nf e p gif38angle of 1f8irf g *.syn3p e/jt$30^{\circ}$ 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 6iaquig44vm3-a j1zy 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 launched 30° above +2l ac7pfzoq- the horizontal from a height of 10.0 above the ground. If+olfq2-za c 7p the initial 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 4o, )n.lvb*lmtrwsi.with a speed of 30 m/s . How much time passes before the position of the projectile makes an angle of 20° above the n* 4.sor mi,v bl.ltw)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 po o a zc,3txd:c vw.yt(q1xy2/8toh6top of a cliff at an angle of cyvxwo cyt8toz3 :/x(qt, p 1.6o2had$15.9^{\circ}$ 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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