Consider an airplane weighing 2 lb in a level cruise flight. Denoting Drag by D, Lift by L, and velocity (in feet per second) by V, it’s Drag-to-Lift relationship is given by 2 4 2 2 2.3769 10 23.9808 L D V V       . Compute and plot the thrust required to maintain the cruise flight for a velocity range of 10 to 100 ft/sec

show the wavelengths of a wave. show the crests of a wave.

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s