Gravitational Potential Energy: Sputnik I Was Launched into Orbit Around

question 22

Multiple Choice

Gravitational potential energy: Sputnik I was launched into orbit around Earth in 1957. It had a perigee (the closest approach to Earth, measured from Earth's center) of 6.81 × 10⁶ m and an apogee (the furthest point from Earth's center) of 7.53 × 10⁶ m. What was its speed when it was at its perigee? The mass of Earth is 5.97 × 10²⁴ kg and G = 6.67 × 10^-11 N ∙ m²/kg².

• A) 7180 m/s
• B) 7840 m/s
• C) 8230 m/s
• D) 11,000 m/s
• E) 13,400 m/s

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Definitions:

Marginal Cost

The expense for creating a supplementary unit of a product or service.

Market Interest Rate

The prevailing rate at which borrowers are willing to borrow money and lenders are willing to lend in the financial market.

Needed Financing

The amount of money required to fund a project, venture, or cover operational expenses not met by current revenues.

Process Innovation

The development and use of new or improved production or distribution methods.