The forces are balanced because there is not one side greater than the other.
hope this helped <33
Hi there!
Kinetic energy can be calculated using the following:

Where:
KE = Kinetic energy (J)
m = mass (kg)
v = velocity (m/s)
Plug in the given values:

It’s D the time period within pendulums are constant, distance is always measured with kilometers within cities and basic unit is always seconds.