In some areas of the world, like california and japan, earthquakes are a common occurrence. how can this best be explained? a) the strong ocean currents are undermining both areas causing earthquakes. b) both area are subjected to strong ocean wind and waves that causes earthquakes. c) both areas are located near the edge of the pacific ocean, the unstable sand causes earthquakes. d) both areas are on the boundary of active plate margins, the motion of the plates causes earthquakes.

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