If an airplane needs a minimum of 148 m/s to take off, and it accelerates at 3 m/s^2, how long should the runway be so that it can take off at this minimum speed?

Assuming it takes off from rest, the runway should have length x such that

(148 m/s)² - 0² = 2 (3 m/s²) x

which follows from the formula,

v² - u² = 2 a ∆x

(where u is initial speed and v is final speed; the other two's significance should be obvious)

Solve for x :

x = (148 m/s)² / (2 (3 m/s²))

x ≈ 3650.67 m

the higher the current the higher the mag field around it the higher the influence on the compass

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.