An Astronaut in a Space Suit Is Motionless in Outer

question 51

Multiple Choice

An astronaut in a space suit is motionless in outer space.The propulsion unit strapped to her back ejects some gas with a velocity of 40.0 m/s.The astronaut recoils with a velocity of 1.00 m/s.If the mass of the astronaut and space suit after the gas is ejected is 100 kg and the mass of the gas ejected is 2.50 kg,then the total kinetic energy after the ejection of the gas is

• A) 2,050 J.
• B) 3,430 J.
• C) 4,150 J.
• D) 5,070 J.
• E) 6,320 J.

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Definitions:

Pro-Social Behaviour

Actions intended to benefit others or society as a whole.

Halo Effect

A cognitive bias where the perception of one positive quality in a person or thing influences the perception of other, unrelated qualities.

Cohesive

Characterized by unity; sticking together as a group or material.

Interdependent

The quality or condition of being mutually reliant on each other; a relationship in which the members are dependent on one another for support or success.