Draw a diagram that shows a 3-N force, a 5-N force, and 8-N force acting on a single block that is in equilibrium.

Since it is mentioned that the block is in equilibrium, this means the resultant force is zero, and all the forces cancel out each other.

You have to think it in a way so that, the forward force cancel out the backward force. Check the picture attached, on the forward side,

3N + 5N = 8N which cancel out the backward force of 8N

well, you would divide 135 by 33 to get your answer. then that is how many seconds it would take. boardman should fly about 132 m or 4.090909090909091 seconds.

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