Answer:
v = 21 m / s
Explanation:
We can solve this exercise with the kinematics equations, let's start by finding the acceleration of the train with the initial data
v = v₀ + a t
the initial speed is the speed within the city 6 m / s, the final speed is v = 11 m / s and the time is t = 8 s
a = (v-v₀) / t
a = (11 - 6) / 8
a = 0.625 m / s²
when it leaves the city with speed vo = 11 m / s it accelerates for t = 16 s
v = v₀ + a t
v = 11 + 0.625 16
v = 21 m / s
7kinetic energy is decreasing in B
If an object is at equilibrium, the net force acting upon the object is 0 Newton.
Answer:
Explanation:
Given
mass of first 
mass of second 
Distance of 
from origin 
Distance of 
from origin 
Moment of inertia is given by multiplication of mass and square of distance
