A 1,450-Kg Experimental Rocket Sled on Level Frictionless Rails Is

question 45

Multiple Choice

A 1,450-kg experimental rocket sled on level frictionless rails is loaded with 50 kg of propellant.It exhausts the propellant in a 20-s "burn." If the rocket,initially at rest,moves at 160 m/s after the burn,what impulse is experienced by the rocket sled?

• A) 0.1 × 10⁵ kg⋅m/s
• B) 1.5 × 10⁵ kg⋅m/s
• C) 2.4 × 10⁵ kg⋅m/s
• D) 8 × 10⁵ kg⋅m/s
• E) ​2.6 × 10⁵ kg⋅m/s

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