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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