Physics

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Easy

Question

# A rocket is launched with velocity 10. If radius of earth is R then maximum height attained by it will be =…….

- 2R
- 3R
- 4R
- 5R

## The correct answer is: 4R

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### The masses and radius of earth and moon are M_{1} ,R_{1 }and M_{2} R_{2 }respectively. Their centres are d distance of apart. The minimum velocity with which a particle of mass should be projected from a point mid way between their centres so that it escapes to infinity is……

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### is perpendicular to , then

For this question, we should know the rules of dot product.

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For this question, we should know the rules of dot product.

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We should remember the formula of direction cosines of all the angles.

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