Determine the mechanical energy of this object: a 1-kg pendulum has a speed of 2 m/s at a height of 1 meter.

I am going to help you using physics

Mechanical Energy = Potential Energy + Kinetic energy (or vice versa)

ME = PE + KE

PE = mgh ( m= mass; g = gravity constant which is 9.81; h = height)
       = (1kg)(9.81)(1m)
PE = 9.81

KE = 1/2mv^2  (m = mass)(v = velocity)
       = 1/2(1 kg)(2 m/s^2)
       = (1/2)(4)
KE = 2

ME = KE + PE
ME = 9.81 + 2
ME = 11.81

hope this helps :)

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