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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 fricti-/ui n0i) (i hkjiyni*onless surface with constant speed. A 0/i-(niu ihi) nk*yij 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, 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 e c 4g-ta*pd m*;()jz,df 64rausnrtlthe same staduplze* ja4rm,)4s6*t ntfr d g ;-ca(rting location. 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 with the same st 7v8jvd p- bsmv97)rt.w gcjog9(3y hpeed from the same starti)owp jvvmc vd79hs b. g t-r9jg87(3ytng location. 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 1)qforor6t g4 horizontally, directly at 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 g4otf16ro)rq 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 thepy,l (9cg4xuy same speed. A at an angle greater than 45 degrees, and arrow B at an angle less than 45 degrees. Both land at the ,xlgupy4(y9c 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 bpir,6nes;mw .-h k+1v,fl*iojh0c t) acv g 9towling ball is dropped from the same height. Assuming air resistance can be ignored, which of the following stap;,gjcs h*, kt0+-f )i.vtwinm l9r6 ocave1htements 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. Th45dkrw55qds0 wqql, ge ball has an initial sped rskw55 q0l4wq ,gqd5ed $v_0$ 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 with an initial velocity v a +)r; pummp11tta (xzqnd an initial kinea m+ut;ppxr1z)q (m1 ttic 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 tob4la)rvwgt /)x /5qyji5u08acew;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. As the bales are falling through the air, what will happen to their dista5a/btl/o8 gev)x4)q0;j5aicwtw y urnce 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 a8 c: -3zm)nbnsxr ,euiirplane 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 s3xesm8cin r)- ,b: nzuituation. 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 kickedz to vwm;-5 we+z .qh.5zw ,pw3s3tdaf a distance of 50 yards down field. Neglecting air resistance, which of the following statements woule hwa-zzwqw,mo5wd tzf+35 3sp ;t. .vd 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 thrown into the airlo:i.q3+ hnv f 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 ae6)hj 0z 1iq6d d1wzh *t8xkkz target 20 m away. In traveling first 5m horizontally*tek)16i1zqkxd w80 hzdjz6 h, the 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 bow at lj0rh; ittq00 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 :6lptp03.xw 6zwxruaem/f,tx,t o 3r 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 3r x6:l6w p,m.twftuepxr/ z03t, xoawas 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 angled8 5tpv- se:wq 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 th74wl, hdbsf w-e 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 trajectoryne4*sby2l y(d of an object thrown horizontally from the top of a building is shown as the dashed line in the figured (e2ybns*l4 y. 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 k-ynh 1*yfi e(nk7x2p at an angle of ifh7 *kkyp1n- xy(en 2$30^{\circ}$ 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 ground at an angle of 6.d,s-n c ktcr$60^{\circ}$ 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 laun dbvsrz2q9y(/ x,*aiea,:pi oex1v2 s ched 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 bv/abr zxi2,e,9q:dp yv(a 2o ss*x1ieelow 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 horizontahusz( f e4n/zg/03vb*p msj 0al with a speed of 30 m/s . How much time pzbhg0mpess* /4f un/a(3v0 jz asses 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 of3 )w-zw+vouxk;km m* u a cliff at an angle of k u*w3xvwk z-m +o);mu$15.9^{\circ}$ 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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