A 1 200-Kg Experimental Rocket Sled on Level Frictionless Rails

question 81

Multiple Choice

A 1 200-kg experimental rocket sled on level frictionless rails is loaded with 55.0 kg of propellant.It exhausts the propellant in a 20-s "burn." If the rocket,initially at rest,moves at 155 m/s after the burn,what impulse is experienced by the rocket sled?

• A)8.5E+3 kg⋅m/s
• B)1.3E+5 kg⋅m/s
• C)1.9E+5 kg⋅m/s
• D)8.5E+5 kg⋅m/s
• E)2.1E+5 kg⋅m/s

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