Name the force between the brakes and the wheels that does work to slow down the vehicle when the brakes are applied

when brakes are applied then the tyres are stopped by brake- shoe

these brake shoe are rubber grip which hold tight at the rim of tyre

when these brake show hold tight at the rim then it will apply normal force on the tyre

Due to the rough surface of rubber and rim of the tyre these two surface apply force of friction on these two surfaces

Due to this friction force it resist the motion of tyre and due to which tyre will stop.

So the main cause to stop the tyre will be FRICTION force between brake shoe and tyre rim

probably not if net force is zero

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