A 958-N Rocket Is Coming in for a Vertical Landing

question 66

Short Answer

A 958-N rocket is coming in for a vertical landing.It starts with a downward speed of 25 m/s and must reduce its speed to 0 m/s in 8.0 s for the final landing.
(a)During this landing maneuver,what must be the thrust force exerted on the rocket by the expelled gas??
(b)What must be the direction of the engine thrust force?

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Definitions:

Hermann Ebbinghaus

A German psychologist famous for his pioneering work on memory, including the discovery of the forgetting curve and the spacing effect.

Memory

The capability of the mind to retain and recall information.

Lincoln Penny

A one-cent coin currently minted in the United States, bearing the image of President Abraham Lincoln.

Encoding Failure

A cause of forgetting that occurs when information was never put into long-term memory.