   Chapter 6, Problem 54P

Chapter
Section
Textbook Problem

The Merlin rocket engines developed by SpaceX produce 8.01 × 105 N of instantaneous thrust with an exhaust speed of 3.05 × 103 m/s in vacuum. What mass of fuel does the engine burn each second?

To determine
The burn rate of a fuel in an engine.

Explanation

Given Info: Instantaneous thrust of a rocket engine is T=8.01×105N and exhaust speed of the engine is ve=3.05×103m/s .

Explanation:

The expression for thrust is,

T=|veΔMΔt| (1)

• T is the instantaneous thrust of a rocket engine.
• ve is the exhaust speed of an engine.
• ΔM/Δt is the burn rate of a fuel in an engine.

Rewrite the equation (1) for the burn rate of a fuel in an engine.

|ΔMΔt|=Tve

Substitute 8

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