Acertain planet has an escape speed v. if another planet has twice the radius and twice the mass of the first planet, its escape speed will be
1. v.
2. v/ 2
3. √.2
4. √ v.
5. 2v.

option A

Explanation:

Escape velocity of the planet

now, it is given that

Second Planet

R₂ = 2R          and M₂ = 2M

now escape velocity of the second planet

now,

on solving

escape velocity of the second planet is equal to first.

The correct answer is option A

it becomes positively charged by charging it

c) up

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