Suppose We Have a Rocket in Outer Space

question 59

Multiple Choice

Suppose we have a rocket in outer space.The rocket consists of a payload of 5280.0 kg and 121000 kg of fuel.Assume that the rocket starts from rest,accelerates to its final velocity.After reaching this final velocity it begins its 3.82 * 10⁵ km trip to the moon.The speed at which the rocket expels propellant is 4.22 km/s.If the rocket is to make the trip from the Earth to the Moon,a distance of 3.82 * 10⁵ km,how long will the trip take to complete ?

• A)15 hours
• B)6.7 hours
• C)23 hours
• D)7.5 hours
• E)7.9 hours

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