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physics

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a polar satellite is launched at 850 km above Earth .find its orbital speed.

  • physics -

    the gravitational constant
    G =6.67•10⁻¹¹ N•m²/kg²,
    Earth’s mass is M = 5.97•10²⁴kg,
    Earth’s radius is R = 6.378•10⁶ m.
    r = 850000 m

    ma=F
    mv²/(R+r)= G•m•M /(R+r)²
    v=sqrt{G•M /(R+r)}= …

  • physics -

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