Which of Newton's Laws explains why satellites need very little fuel to stay in orbit?

1^{s t}

Law

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2^{n d}

Law

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3^{r d}

Law

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Law of conservation of mass

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Solution

The correct option is A $1^{s t}$ Law
Once a satellite is in orbit, the only net force acting on it is the inward force of gravity. The tangential speed of the satellites is just right so that gravity only has the effect of changing the direction of travel. It is a near vacuum in space so the satellite encounters almost no friction to slow them down.

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