A student releases the bob of a pendulum as shown. Neglect loss. Identify the energy types present at each time for the highlighted object or system
relative to the reference level shown. Also identify if loss occurs and/or work is done
by a non-conservative force between each time (if necessary).
reference level
b

whichever one it is, it's definitely not one that you included on the list you provided.

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