1. In the movie Wall-E there is a mostly accurate scene where the robot Wall-E u

Question

1. In the movie Wall-E there is a mostly accurate scene where the robot Wall-E uses a fire extinguisher to maneuver around in space. You can see the scene at https: //youtu.be/P8sUVhR7xjE. An average dry chemical fire extinguisher has 4 kg of chemicals that can be sprayed and the spray comes out of the nozzle at about 30 m/s. If we assume that the spray comes out very quickly (so that we don't waste any momentum speeding up the spray before it get's sprayed out) and Wall-E has a mass of 10 kg, what is the top speed Wall-E could achieve using only a fire extinguisher?

Explanation / Answer

SOL)

we use the conservation of momentum principle where

Wall-E=10 kg

after release of chemicals mass=10-4 =6kg

so 4*30=6*v

v=20m/s

Top speed of Wall-E=20m/s

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.