Asolid cylinder with a mass of 266 kg and radius 0.070 m is rotating with an angular speed of 83.0 rad/s about an axis passing through its center and perpendicular to its end faces. the rotation of the cylinder is slowed down by a factor of 5 by applying a tangential frictional force to it for 4.90 s. what is the magnitude, in n, of the friction force applied to the cylinder?

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

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