To introduce you to the concept of escape speed for rocket. The escape speed is

Question

To introduce you to the concept of escape speed for rocket. The escape speed is defined to be the minimum speed with which an object of mass m must move to escape from the gravitational attraction of a much larger object, such as a planet of total mass M. The escape speed is a function of the distance of the object from the center of the planet R, but unless otherwise specified this distance is taken to be the radius of the planet because it addresses the question "How fast does my rocket have to go to escape from the surface of the planet?" Kinetic energy is constant. true false The angular momentum about the center of the planet and the total mechanical energy will be constant regardless of whether the object moves from small R to large R (like a rocket being launched) or from large R to small R (like a cornet approaching the earth.) true false

Explanation / Answer

Part E

The answer is - true.

Explanation - As per conservation of angular momentum, it will be conserved unless an external torque is applied and as per conservation of energy, it will be conserved unless any energy from outside is supplied. Since during the motion of a rocket away from planet and motion of comet towards the planet, neither an eternal torque is applied nor energy is supplied from outside. Hence both of these quantities are conserved.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

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