Whoever answers correctly gets brainliest

which of the following happens when f is less than 5 n? (in the pic below)

[ ] the object moves up.
[ ] the object moves down.
[ ] balanced forces keep the object stationary.
[ ] balanced forces keep the object's speed constant.

in this image, you can see solar radiation going through ocean water.

no image, but probably absorption

b.a device that inputs heat into a cool object

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