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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: 游客未登录  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 acros- 6m9*sveun pqs a frictionless surface with constant speed. A person then applies a constant force to the North on the object. What is the resulting p qnu9s- m6*pevath 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 from the s1t67r h7ejoe(ek nga8 ame starting locatio8 enrhjg(76e 17etkaon. 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 amb6 pc+q5)gd gre launched with the same speed from the same starting location.bggq 6d)5 m+pc 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 n+al bo4p+rg,p2a5q k4 hl q1yat the center of a target 20 m away. The arrow hits 0.050 m below the center of the target. Neglecting air resistance, what was trl4+p 5 b+a4yq2ohpg1q,knalhe 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 launchc5 w4 (m/kefdzed at the same time with the same 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 on the groun cf4/5z(dmwekd. 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 horiz-xw:)f.af gi9s g+fb kontally 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 iswb+ x)ggf fska-: fi9. 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 h7pxodeojy 2py-0rr *n t;:0 kxorizontal table. The ball has an initxk dnoeyt70*x2p pjorr :;0y-ial 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 witkjse(v (i0.blntk(-w *8 rmnth an initial velocity v and an initial kinetic ener jn8v t((-lbi*m0skt wek(rn.gy $E_k$. 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 tx/1x)9umf:uf 7 uu umhay 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. As the bales are falling thromtu/9x )ufxu:uf71umugh 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 droppn/k t1 ko1imr-ed 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 eachk1/to-n ki1 rm 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 ue 1z;wu ,k9o ou)we*ya distance of 50 yards down field. Neglecting air resistance, which of the following statements would be INCORRECTeo)wy,1u u 9u;zwe*ko 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 thrown into the atm* b 1o6qj ,yf ,al0.priehkb*cjf )(ir 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 travemgrue)6gyzhsa,i 36 qu )rq r *rm:,h2 0ptqs.ling first 5m horizontally, the arrow falls 0.2 m. In traveling the next 5 m horizontally it will fall a additiuzh)qy2 r6rrptm 6 *smi. ugh03arqq,s ),:geonal

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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 a9ph 7oxj(alg-cp py6.ln 36yi 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 launc tb + j5(qjdg+os /ymo(rvhly(+4 rar-hed 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 positmsqr5rojb+4 /+-yl (vyj(do+(rg hta ion 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 th+ ry1gckit 5g:j3c;marown at 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 launched from the top of a cliff wiai r8w4 fbn6l;th 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 ob3vp pxq2d0i 5oject thrown horizontally from the top of a building is shown as xivq2p3od p05the 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 throws a small object from the top of a building at an angle o6;c s2rk :z0 9 mfqsxatk,2oimf mr,;2xz9 okc6s :a2ti fm 0kqs$30^{\circ}$ 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 groemj, fvoh3) u6und 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 a height of ssweku2be1sbrz (*p+y m6a-6 10.0 above the ground. If the initial speed of the object is 15.0 m/s, at what angle below the (y p r 1kbss+6 um*-w6eaezs2bhorizontal 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° )um qrn+z*b a(above the horizontal with a speed of 30 m/s . How much time passes before the position of the projectile makes an angle of 20° above the horizoa(n qu* r+bz)mntal 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 theo hd 6.u24vxvx top of a cliff at an angle ofou4h .x dvv2x6 $15.9^{\circ}$ 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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