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Physics Chapter 4 : Topic 8
Artificial Gravity
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Artificial gravity is created in spacecraft mainly to:
Reasoning: Artificial gravity provides an apparent weight-like force to reduce the effects of weightlessness.
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The most common method of creating artificial gravity in a spacecraft is:
Reasoning: Rotation produces an outward apparent effect similar to gravity.
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Artificial gravity in a rotating spacecraft is produced due to:
Reasoning: Rotation creates an apparent outward force that presses astronauts against the outer wall.
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A rotating space station creates artificial gravity because:
Reasoning: Rotation creates an apparent outward effect that mimics weight.
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Artificial gravity is not true gravity because:
Reasoning: Real gravity results from gravitational attraction, while artificial gravity results from rotation.
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In a rotating spacecraft, artificial gravity increases when:
Reasoning: $\mathbf{a}\mathbf{=}\mathbf{r}\mathbf{\omega}^{\mathbf{2}}$Greater angular velocity produces greater centripetal acceleration.
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Artificial gravity can be increased by:
Reasoning: Artificial gravity depends on rotational acceleration.
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The artificial gravity experienced by astronauts depends on:
Reasoning: $\mathbf{a}\mathbf{=}\mathbf{r}\mathbf{\omega}^{\mathbf{2}}$ depends on radius and angular velocity.
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If the radius of a rotating spacecraft is doubled while angular velocity remains constant, artificial gravity:
Reasoning: $\mathbf{a}\mathbf{=}\mathbf{r}\mathbf{\omega}^{\mathbf{2}}$ Acceleration is directly proportional to radius.
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If angular velocity of a rotating spacecraft is doubled, artificial gravity becomes:
Reasoning: $\mathbf{a}\mathbf{=}\mathbf{r}\mathbf{\omega}^{\mathbf{2}}$Doubling angular velocity increases acceleration by $\mathbf{2}^{\mathbf{2}}\mathbf{= 4}$.
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Astronauts in a rotating spacecraft feel pushed toward the outer wall because of:
Reasoning: Due to inertia, astronauts tend to move straight while the spacecraft rotates around them.
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The floor of a rotating spacecraft acts like Earth’s surface because it:
Reasoning: The floor pushes on astronauts, creating a sensation of weight.
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Artificial gravity helps astronauts by reducing:
Reasoning: Artificial gravity helps maintain muscle strength and bone health.
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A non-rotating spacecraft in deep space produces:
Reasoning: Without acceleration or support force, astronauts experience weightlessness.
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Artificial gravity in a spacecraft is similar to gravity because both:
Reasoning: Both create a feeling of weight by producing acceleration / support force.
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A rotating space station has a larger radius mainly because:
Reasoning: Larger radius allows the same artificial gravity with lower angular velocity.
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A small rotating spacecraft must rotate faster than a large one to produce the same artificial gravity because:
Reasoning: $\mathbf{a}\mathbf{=}\mathbf{r}\mathbf{\omega}^{\mathbf{2}}$ ; Smaller $\mathbf{r}$ requires larger $\mathbf{\omega}$.
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Artificial gravity is usually created by making the spacecraft:
Reasoning: Rotation creates centripetal acceleration.
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If a rotating spacecraft stops rotating, astronauts will:
Reasoning: Without rotation, the artificial gravity effect disappears.
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The acceleration experienced by astronauts due to rotation is directed:
Reasoning: Astronauts feel an outward effect similar to gravity.
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Artificial gravity in a rotating spacecraft is calculated using:
Reasoning: Rotational acceleration creates artificial gravity.
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A spacecraft rotates with angular velocity $\mathbf{2\ rad/s}$ and radius $\mathbf{5\ m}$. Artificial gravity acceleration is:
Reasoning: $\mathbf{a}\mathbf{=}\mathbf{r}\mathbf{\omega}^{\mathbf{2}}\mathbf{= 5}\mathbf{(2)}^{\mathbf{2}}\mathbf{= 20\ m/}\mathbf{s}^{\mathbf{2}}$
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A rotating spacecraft has radius $\mathbf{10\ m}$ and angular velocity $\mathbf{1\ rad/s}$. Artificial gravity is:
Reasoning: $\mathbf{a}\mathbf{=}\mathbf{r}\mathbf{\omega}^{\mathbf{2}}\mathbf{= 10}\mathbf{(1)}^{\mathbf{2}}\mathbf{= 10\ m/}\mathbf{s}^{\mathbf{2}}$
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To reduce dizziness in a rotating spacecraft, engineers prefer:
Reasoning: High rotation rates can cause uncomfortable effects.
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A rotating spacecraft produces artificial gravity equal to Earth’s gravity when:
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Artificial gravity does not require:
Reasoning: Artificial gravity can be produced without Earth’s gravity.
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A person inside a rotating spacecraft feels heavier because:
Reasoning: The normal force from the floor creates the sensation of weight.
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The main difference between weightlessness and artificial gravity is:
Reasoning: Artificial gravity provides a support force similar to Earth’s surface.
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If the rotation rate of a spacecraft increases, astronauts will feel:
Reasoning: Greater angular velocity increases rotational acceleration.
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Artificial gravity is useful during long space missions because it:
Reasoning: It helps reduce muscle loss and bone weakening.
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A rotating spacecraft creates artificial gravity because:
Reasoning: Rotation provides acceleration that produces an apparent weight.
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In a rotating spacecraft, an astronaut standing near the outer edge experiences:
Reasoning: $\mathbf{a}\mathbf{=}\mathbf{r}\mathbf{\omega}^{\mathbf{2}}$ ; Greater radius gives greater acceleration.
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Artificial gravity would be smallest near:
Reasoning: At the axis of rotation, radius is zero.
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At the center of a rotating spacecraft, artificial gravity is:
Reasoning: $\mathbf{a}\mathbf{=}\mathbf{r}\mathbf{\omega}^{\mathbf{2}}$ ; At $\mathbf{r}\mathbf{= 0}$, acceleration is zero.
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The sensation of artificial gravity is actually caused by:
Reasoning: Rotation creates acceleration and the floor provides support.
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Which statement correctly explains artificial gravity?
Reasoning: Artificial gravity is produced by rotation, not by creating a gravitational field.
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