A ball is rolled forward at 2 m/s on the floor of a train car. If the - - PowerPoint PPT Presentation

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a ball is rolled forward at 2 m s on the floor of a train
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A ball is rolled forward at 2 m/s on the floor of a train car. If the - - PowerPoint PPT Presentation

Jan 30, 2024 125 likes •199 views

A ball is rolled forward at 2 m/s on the floor of a train car. If the train is moving forward at 50 m/s relative to the station platform, i i i f d 50 / l i h i l f what is the velocity of the ball as measured by an observer standing on

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SLIDE 1
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SLIDE 2

A ball is rolled forward at 2 m/s on the floor of a train car. If the i i i f d 50 / l i h i l f train is moving forward at 50 m/s relative to the station platform, what is the velocity of the ball as measured by an observer standing on the platform? g p

  • A. 2 m/s
  • B. 48 m/s
  • C. 50 m/s
  • D. 52 m/s

E Not enough information is given

  • E. Not enough information is given.
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SLIDE 3
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SLIDE 4

A pulse of light pointing forward is emitted by a flashlight held b di i i If h i i i f d by a person standing in a train car. If the train is moving forward at 50 m/s relative to the station platform, what is the velocity of the pulse as measured by an observer standing on the platform? p y g p

  • A. 50 m/s
  • B. c - 50 m/s
  • C. c
  • D. c + 50 m/s

E Not enough information is given

  • E. Not enough information is given.
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SLIDE 5

As a high-speed spaceship flies past you at half the speed of li h i fi b li h A b b d h hi Q37.1 light, it fires a strobe light. An observer on board the spaceship measures a spherical wave front that spreads away from the strobe light with the same speed c in all directions. The wave g p front that you measure

  • A. is spherical and remains centered on the spaceship as it moves.
  • B. is spherical and is centered on the point where the spaceship

was when the strobe was fired.

  • C. is not spherical, but remains centered on the spaceship as it

moves.

  • D. is not spherical, but is centered on the point where the

spaceship was when the strobe was fired.

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SLIDE 6

Samir, who is standing on the ground, starts his stopwatch at the i M i fli hi i h hi d f 0 6 instant Maria flies past him in her spaceship at a speed of 0.6 c. At the same instant, Maria starts her stopwatch. As measured by Samir, what is the reading on Maria’s stopwatch at the instant g p that his stopwatch reads 10.0 s?

  • A. Less than 10.0 s but more than 0.0 s
  • B. 10.0 s
  • C. More than 10.0 s
  • D. 0.0 s

E Not enough information is given

  • E. Not enough information is given.