How can two objects with different masses be in balanced equilibrium on a beam with a pivot at the beam center of mass

What are the three ways that an object can accelerate

Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge