Determine a prescalar, ocr0a value, and isr for an 8-bit timer to generate a 400hz square wave for 3 seconds on pd1. recall the arduino runs at 16 mhz and valid prescalars are: 1, 8, 64, 256, 1024(choose the smallest prescalar that works).

no. dot product   =0 when vecs at right angles

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