An Unfueled 1000-Kg Experimental Rocket Sled at Rest on Level

question 50

Multiple Choice

An unfueled 1000-kg experimental rocket sled at rest on level frictionless rails is loaded with 50 kg of propellant.It exhausts the propellant in a 20 s "burn." The rocket moves at 160 m/s after the burn.What average force is experienced by the rocket during the burn?

• A)0.80 × 10⁴ N
• B)0.75 × 10⁴ N
• C)0.60 × 10⁴ N
• D)0.35 × 10⁴ N

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Definitions:

Ring Gear

Spur gear such as that used on a flywheel for engine cranking, or the outer member of a planetary gearset.

Differential Case

The outer housing that encloses the differential mechanism in a vehicle, protecting its gears and components.

Differential Action

The mechanism in a vehicle's differential that allows two drive wheels to rotate at different speeds while turning, improving traction and handling.

Outside Wheel

In vehicular turns, the wheel farthest from the turn center, which travels a greater distance and may experience more wear.