Part IlIl Solved problems. Show your work for partial or full credit. 18. a. If
ID: 1997264 • Letter: P
Question
Part IlIl Solved problems. Show your work for partial or full credit. 18. a. If a thrust force of 5.0x10 Newtons is applied to a 12,000 kg plane over a distance of t force of 5.0x10 Newtons is applied to a 12,000 kg plane over a distance of 800 meters while it is taking off, how much work was done on the plane? (5 pts) Work = Force-di(tance work =[600,000 N-t12,000 KgY1.qm/s)! ( 800 m) work = (6 00,000 N-117, (o 00 N)( 800 m) work = 882,400 (200 m) Wor K 205, 2o, ooo Joules 3.0lx tD Joutes b. Using conservation of energy, what will be the speed of the plane after the 800 meters? Will the plane be able to take off if its minimum ground speed for take-off is 95 m/sec? (5 pts)Explanation / Answer
A) WORK DONE = net force * displacement
= (5*10^5 - 12000*9.8) * 800
= 3.059 *10^8 J
b) work done = change in KE
3.059*10^8 = 0.5*12000*v^2
v = 225.8 m/s
Yes, the plane will be able to take off