A Robot Spacecraft Is Sent to Mars to Explore the Martian

question 43

Multiple Choice

A robot spacecraft is sent to Mars to explore the Martian polar ice cap. Designers can surround it with a set of inflatable balloons that pop out like automobile air bags as soon as the spacecraft's re-entry parachute opens up. When the spacecraft lands, it will be able to roll for a few meters across the surface of Mars. The popout balloons have an advantage to the spacecraft, because

• A) they cancel out the normal force of the surface of Mars.
• B) they decrease the kinetic energy.
• C) they increase the time of impact and lessen the stopping force.
• D) the impulse that stops the spacecraft for landing is less with these balloons.

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Definitions:

Street Harassment

Unwanted comments, gestures, and actions forced upon strangers in public spaces without their consent, often rooted in gender-based discrimination.

Busy Street

A street characterized by a high volume of pedestrian or vehicular traffic.

Homophobia

An irrational or phobic fear of gay men and lesbian women. See also anti-gay prejudice; heterosexual bias.

Phobic Fear

An irrational and intense fear of a specific object, situation, or activity, leading to significant anxiety and avoidance behaviors.