A Toy Rocket Is Launched Vertically from Ground Level at Time

question 158

Multiple Choice

A toy rocket is launched vertically from ground level at time t = 0.00 s.The rocket engine provides constant upward acceleration during the burn phase.At the instant of engine burnout,the rocket has risen to 81 m and acquired an upward velocity of 40 m/s.The rocket continues to rise with insignificant air resistance in unpowered flight,reaches maximum height,and falls back to the ground.The upward acceleration of the rocket during the burn phase is closest to

• A)9.9 m/ \(\mathrm { s ^2}\)
• B)9.6 m/ \[\mathrm { s }^2\]
• C)9.3 m/ \[\mathrm { s }^2\]
• D)9.0 m/ \(\mathrm { s }^2\)
• E)8.7 m/ \(\mathrm { s }^2\)

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Definitions:

Free Blacks

African Americans who were not enslaved and lived in the United States before the abolition of slavery.

Militia

A military force that is raised from the civil population to supplement a regular army in an emergency.

Maryland Act

Legislation specific to the state of Maryland, often requiring more context to define its purpose or scope, as many acts could carry this name.