A 1 000-Kg Experimental Rocket Sled at Rest on Level

question 66

Multiple Choice

A 1 000-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 150 m/s after the burn.What average force is experienced by the rocket during the burn?

• A)0.95 x 10⁴ N
• B)0.75 x 10⁴ N
• C)0.60 x 10⁴ N
• D)0.35 x 10⁴ N

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The additional output that is produced by adding one more unit of labor, keeping other inputs constant.

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