What is the gain of potential energy of the barbell when it is lifted to this height?

Each neuron shown in this figure innervates a group of muscle fibers. what is the term for a group of muscle fibers innervated by a single neuron?

The force it would take to accelerate an 900-kg car at the rate of 6m/s2

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block