Question 12 af 14 Incorrect Incorrect Incorrect Sapling Learning Robert has just

Question

Question 12 af 14 Incorrect Incorrect Incorrect Sapling Learning Robert has just bought a new model rocket, and is trying to measure its fight characteristics. The rocket engine package claims that it will maintain a constant thrust of 11.1 N until the engine is used up. Robert launches the rocket on a windless day, so that it travels straight up, and uses his laser to meaure thatthe height of the rocket when the engine cuts offis 1 m. He also measures the k height, which is 23.5 m. If the rocket has a mass of 0.613 kg, how much work is done by the drag rocket during its ascent? Previous Check Answer Next Exit ML

Explanation / Answer

Work down by thrust = F*deltaY

= 11.1*19.0
  
= 210.9 J

work down by gravity = - m*g*h

= - 0.613*9.81*23.5

= - 141.31 J

work down by drag force

= work down by thrust + work down by gravity

= - (210.9 -141.31)

= - 69.59 J

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