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tia_tia [17]
3 years ago
15

2. A girl whose mass is 55kg stands on a spring weighing machine inside a lift. When the lift starts to ascend, its acceleration

Physics
1 answer:
Annette [7]3 years ago
5 0

Answer:

b

Explanation:

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A body moving in a circular path has _______ displacement. ​
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When you shock your self because of a door knob this is an example of
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C

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4 years ago
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A ladder 5.0 m long leans against a wall inside a spaceship. From the point of view of a person on the ship, the base of the lad
andriy [413]

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the angle the ladder makes with the floor as seen by an observer on Earth is 71.9°

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Given the data in the question and as illustrated in the diagram below.

speed of the ship v = 0.90c

base of the ladder from the wall x₀ = 3.0 m

top of the later above the floor y = 4.0 m

we determine angle θ.

from the diagram,

tanθ = y/x₀

tanθ = y / x₀√( 1 - v²/c² )

we substitute

tanθ = 4.0 / 3.0√( 1 - ((0.9c)²/c²) )

tanθ = 4.0 / 3.0√( 1 - ((0.9²)c²/c²) )

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Therefore, the angle the ladder makes with the floor as seen by an observer on Earth is 71.9°

3 0
3 years ago
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