Essentials of Physics by Cutnell and Johnson Chapter 6: Work and Energy Question

Question

Essentials of Physics by Cutnell and Johnson Chapter 6: Work and Energy Question 12: A fighter jet is launched from an aircraft carrier with theaid of its own engines and a steam-powered catapult. Thethrust of its engines is 2.3 x 104 N. In beinglaunched from rest it moves through a distance of 87 meters and hasa kinetic energy of 4.5 x 107 Joules at lift off. What is the work done on the jet by the catapult? Essentials of Physics by Cutnell and Johnson Chapter 6: Work and Energy Question 12: A fighter jet is launched from an aircraft carrier with theaid of its own engines and a steam-powered catapult. Thethrust of its engines is 2.3 x 104 N. In beinglaunched from rest it moves through a distance of 87 meters and hasa kinetic energy of 4.5 x 107 Joules at lift off. What is the work done on the jet by the catapult?

Explanation / Answer

given that thrust in ingine =   Wthurst = 2.3* 104 N kinetic energy = 4.5 * 107 joules distance = 87m the work done by the catpult Wcat isone contriubution to the work done by the net external force thatchanges the kinetic energy of the plane. the othercontribution of work W thurst + Wcat =Kf - K0 but here K0 = 0     we can write the work energy theorem Wcat + Fcos * s = Kf Wcat = Kf - Fcos * s =4.5 * 107 J - (2.3 * 104 ) cos00 (87m ) = --------J we note that the angle between the thurst anddisplacepement is 00 because they have samedirection. but here K0 = 0     we can write the work energy theorem Wcat + Fcos * s = Kf Wcat = Kf - Fcos * s =4.5 * 107 J - (2.3 * 104 ) cos00 (87m ) = --------J we note that the angle between the thurst anddisplacepement is 00 because they have samedirection.

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

---

---

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