6.1 special relativity 1 - 无忧得胜-网上国际课程 (5edu.win)

1#

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Two cyclists, A and B, start riding their bicycles from the same point. Cyclist A moves northwards with a speed of $4V$ relative to the ground, and cyclist B moves westwards with a speed of $3V$ relative to the ground.

The magnitude of the velocity of the Cyclist A relative to the Cyclist B is

A. $v$

B. $4v$

C. $5v$

D. $7v$

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2#

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Observations of muon decay can be used as evidence of

I. Time Dilation
II. Length Contraction
III. Absolute Simultaneity

A. statement I only

B. statement II only

C. statements I and II only

D. statements II and III only

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3#

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At a relativistic speed, a rocket journeyed froa doq*z9,o qm3 c1ajv-fl-,xxm Earth to Saturn. The duration of the travel is measured according to the stationary observer on oj1 -3vcaz*qxdf al -9xoq m,,earth as $t$. The length of the rocket is measured according to the observer in the rocket as $L$. Which of the following is correct for the time of travel according to the observer in the rocket and the length of the rocket according to the observer on the Earth?

A. Time of travel (rocket observer) is less than t; Length of the rocket (Earth observer) is shorter than L

B. Time of travel (rocket observer) is less than t; Length of the rocket (Earth observer) is longer than L

C. Time of travel (rocket observer) is greater than t; Length of the rocket (Earth observer) is shorter than L

D. Time of travel (rocket observer) is greater than t; Length of the rocket (Earth observer) is longer than L

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4#

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You are riding in a spaceship that has no windows, radios, or other means for yo8r)x8gn -sp16viil mws jdj13 u to observe or measure what is outsid-ji6 g8mnjrp1d13w ixv)s sl8e. You wish to determine if the ship is stopped or moving at constant velocity. What should you do?

A. You can determine if the ship is moving by determining the apparent velocity of light.

B. You can determine if the ship is moving by checking your precision time piece. If it's running slow, the ship is moving.

C. You can determine if the ship is moving either by determining the apparent velocity of light or by checking your precision time piece. If it's running slow, the ship is moving.

D. You should give up because you have taken on an impossible task.

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5#

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The Michelson-Morley experiment was designed to meahtbb7q 793m srsure

A. the relativistic mass of the electron.

B. the relativistic energy of the electron.

C. the velocity of the Earth relative to the ether.

D. the acceleration of gravity on the Earth's surface.

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6#

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Michelson and Morley conc zps(a2p wv.0mh-y 2fz2z nry af6,vt,luded from the results of their experiment that

A. the experiment was a failure since there was no detectable shift in the interference pattern.

B. the experiment was successful in not detecting a shift in the interference pattern.

C. the experiment was a failure since they detected a shift in the interference pattern.

D. the experiment was successful in detecting a shift in the interference pattern.

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7#

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You can build an interferometer yourself if you use the nfwxp )wo rl0/.*ao8sfollowing components:

A. a light source, a detector screen, a partially silvered mirror, a flat mirror, and a glass plate.

B. a light source, a detector screen, two partially silvered mirrors, and a glass plate.

C. a light source, a detector screen, two partially silvered mirrors, a flat mirror, and a glass plate.

D. a light source, a detector screen, a partially silvered mirror, two flat mirrors, and a glass plate.

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8#

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The theory of special repe*jy90u0c 3d (oau d+s/aybelativity

A. is based on a complex mathematical analysis.

B. has not been verified by experiment.

C. does not agree with Newtonian mechanics.

D. does not agree with electromagnetic theory.

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9#

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One of Einstein's postuad/qk*1;)eyp s t5j rie/tod:lates in formulating the special theory of relativity was that the laws of physics are the same in referen 5pksj :* ri;q1d/)eeo ytta/dce frames that

A. accelerate.

B. move at constant velocity with respect to an inertial frame.

C. oscillate.

D. are stationary, but not in moving frames.

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10#

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If you were to measure your pul v2hwln.m6 */3/9ldluziq mx qse rate while in a spaceship moving away from the Sun at a speed close to the speedwlllq/n /dv mz26.mx9hu3 qi* of light, you would find that it was

A. much faster than normal.

B. much slower than normal.

C. the same as it was here on Earth.

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11#

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Relative to a stationary observer, a moving clocklkerx (jc1y.-xl -2yw

A. always runs slower than normal.

B. always runs faster than normal.

C. keeps its normal time.

D. can do any of the above. It depends on the relative velocity between the observer and the clock.

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12#

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The gamma factor is defa2(xwy2rt*hx7o 4vv vn. 4chtined as $\gamma = 1 / \sqrt{1- (v/c)^2}$, therefore gamma ($\gamma$)

A. can be zero.

B. can be any number less than or equal to one.

C. can be any number greater than or equal to one.

D. cannot equal one.

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13#

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Suppose one twin takes a ride in a spaco1uox) x+jof 3e ship traveling at a very high speed to a distant star and ba+o3joufxo )x 1ck again, while the other twin remains on Earth. The twin that remained on Earth predicts that the astronaut twin is

A. younger.

B. the same age.

C. older.

D. cannot be determined from the given information

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14#

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Relative to a stationaq9 b f2k6.amr:gz9tomry observer, a moving object

A. appears shorter than normal.

B. appears longer than normal.

C. keeps its same length time.

D. can do any of the above. It depends on the relative velocity between the observer and the object.

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15#

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An object moves in a direction parallel to its le4qzqi.fp,2oywa0:(kk y2d fyngth with a velocity that approaches the velocity of light. The width of this object, as measured by a stationary obserz:fa iy.dyqqwk20 ,pkfyo (4 2ver,

A. approaches infinity.

B. approaches zero.

C. increases slightly.

D. does not change.

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16#

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An object moves in a dycadq)1 fkcz (b+)2bn ztnq0)irection parallel to its length with a velocity that approaches the velocity of light. The length of thfcbnqt2)k ( )nqd bc1zy0+az) is object, as measured by a stationary observer,

A. approaches infinity.

B. approaches zero.

C. increases slightly.

D. does not change.

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17#

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As the speed of a particle approaches the speed of ligh ba f agcwa7w/7n+7eb-:.w pyst, the mass of the particleg.wawway-+/sa:cb7e f pnb 77

A. increases.

B. decreases.

C. remains the same.

D. approaches zero.

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本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信xxxxxxxxxx，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

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