The radius of the merry-go-round is 10 meters. The Chile has a mass of 40 kilograms. What is the child’s moment of inertia

3920Nm

Explanation:

Mass=40kg

Acceleration due to gravity=9.8m/s^2

Distance=10meters

force=mass x acceleration due to gravity

Force=40x9.8

Force=392N

Moment of inertia=force x distance

Moment of inertia =392 x 10

Moment of inertia =3920Nm

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