:Launching a Jet: Understand the Physics of a Catapult

[NewJersey]

An aircraft carriers capapult accelerates a 2000-kg jet aircraft from rst to a lauch speed of 320m/s in 2.0s.

a) The net force on the plane is ?
b) the length of the catapult is ?

F= m/a Lenght= at^2/2 vf=vo*at

320m/s= (0) * a * 2.0s
a= 160 m/s

F= 2000kg * 160m/s
= 320,000 N

b at^2/2 160*4/2= 320M

Is this right

The Attempt at a Solution

 

[Shooting Star]

"F= m/a Lenght= at^2/2 vf=vo*at " ? NOT right.

F=ma.
vf=v0+at.

 

[Vijay Bhatnagar]

Your solution is correct.

 

[NewJersey]

ok yeah, I meant to put the + sign instead of *.