Which statement correctly describes the relationship between wavelength and frequency? (A) As the wavelength decreases, frequency increases because more waves pass a point each second.
(B) As the wavelength decreases, frequency increases because fewer waves pass a point each second.
(C) As wavelength increases, frequency increases because more waves pass a point each second.
(D) As wavelength increases, frequency increases because fewer waves pass a point each second.

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

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y

490 n

f=125n a=2.5m/s2