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Acceleration due to gravity on a planet ...

Acceleration due to gravity on a planet is 10times the value on the earth . Escape velocity for the planet and the earth are `V_(f) and V_(e)` respectively Assuming that the radii of the planet and the same then

A

`V_(p) = 10 V_(a)`

B

` V_(p) = sqrt(10) V_(e)`

C

` V_(p) = (V_(e))/(sqrt(10))`

D

`V_(p) = (V_(e))/(10)`

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The correct Answer is:
To solve the problem, we need to find the relationship between the escape velocities of a planet and the Earth, given that the acceleration due to gravity on the planet is 10 times that on Earth and that their radii are the same. ### Step-by-Step Solution: 1. **Understand the Given Information**: - Let \( g_e \) be the acceleration due to gravity on Earth. - Let \( g_p \) be the acceleration due to gravity on the planet. - We are given that \( g_p = 10 g_e \). - Let \( R \) be the radius of both the Earth and the planet (since they are the same). 2. **Formula for Escape Velocity**: The escape velocity \( V \) from a celestial body can be expressed as: \[ V = \sqrt{2gR} \] where \( g \) is the acceleration due to gravity and \( R \) is the radius of the body. 3. **Escape Velocity for Earth**: The escape velocity for Earth (\( V_e \)) is: \[ V_e = \sqrt{2g_e R} \] 4. **Escape Velocity for the Planet**: The escape velocity for the planet (\( V_p \)) is: \[ V_p = \sqrt{2g_p R} \] Substituting \( g_p = 10g_e \) into the equation: \[ V_p = \sqrt{2(10g_e)R} = \sqrt{20g_e R} \] 5. **Relating \( V_p \) and \( V_e \)**: Now we can express \( V_p \) in terms of \( V_e \): \[ V_p = \sqrt{20g_e R} \] We know that: \[ V_e = \sqrt{2g_e R} \] To relate \( V_p \) and \( V_e \), we can write: \[ V_p = \sqrt{10} \cdot \sqrt{2g_e R} = \sqrt{10} \cdot V_e \] 6. **Final Relationship**: Thus, the relationship between the escape velocities is: \[ V_p = \sqrt{10} \cdot V_e \] ### Conclusion: The escape velocity for the planet is \( \sqrt{10} \) times the escape velocity for the Earth.

To solve the problem, we need to find the relationship between the escape velocities of a planet and the Earth, given that the acceleration due to gravity on the planet is 10 times that on Earth and that their radii are the same. ### Step-by-Step Solution: 1. **Understand the Given Information**: - Let \( g_e \) be the acceleration due to gravity on Earth. - Let \( g_p \) be the acceleration due to gravity on the planet. - We are given that \( g_p = 10 g_e \). ...
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