A 910-Kg Object Is Released from Rest at an Altitude

question 43

Multiple Choice

A 910-kg object is released from rest at an altitude of 1200 km above the north pole of the earth.If we ignore atmospheric friction,with what speed does the object strike the surface of the earth? (G = 6.67 × 10^-11 N ∙ m²/kg²,M_earth = 5.97 × 10²⁴ kg,the polar radius of the earth is 6357 km)

• A)4.5 km/s
• B)2.2 km/s
• C)2.7 km/s
• D)3.2 km/s
• E)4.8 km/s

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Definitions:

Heparin

Anticoagulant that prevents platelet agglutination and thus prevents thrombus formation.

Platelet Plug

Accumulation of platelets that stick to each other and to connective tissue; prevents blood loss from damaged blood vessels.

Collagen Fibers

Strong, insoluble protein fibers that provide structural support, strength, and elasticity to connective tissue.

Thrombin

An enzyme in blood plasma that causes the clotting of blood by converting fibrinogen to fibrin.