Yet another physics need a little more help?

Question

DISTANCE- An airplane starts from rest and accelerates at a constant 3.00 m/s^2 for 30.0 s before leaving the ground.

a) How far did it move?

b) How fast was the airplane going when it took off?

show me how you got the answers please. THANKS

Answer 1

This and some of other Physics questions asked by you are very basic questions. If you know basic kinematics, then you can easily solve these problems. If somebody else solves these problems for you, then you will again have problem in solving similar problems unless you learn the theory well. That will harm you when you will need to solve problems yourself, e.g., in exams. Therefore, learn theory first. I am solving this for you. Let me know if you need any help from me in learning the theory.

Solution:

Initial velocity u = 0

Acceleration a = 3.00 m/s^2

Time t = 30.0 s

a)Displacement s = ?

s = ut + 1/2 * a * t^2

= 0*30 + 1/2 * 3 * 30^2

= 1/2 * 3 * 900

= 1350 m

b) Final velocity v = ?

v = u + at

= 0 + 3 * 30

= 90.0 m/s