Below is a diagram of a weight on a spring. when the weight is pulled down and then released the spring compresses and expands. each position indicates a different point in time.
a. in all four positions mechanical energy is 0 j
b. the elastic potential energy of the spring at position 2 is converted to kinetic energy
c. the chemical potential energy of the spring is greatest at position 4
d. in all four positions, the gravitational potential energy of the spring is the same

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

Suppose that a mass of 2 kg is attached a spring whose spring constant is 50. the system is damped such that b = 12 . the mass is set in motion with an initial velocity of -8 m/s at a position 0 meters from equilibrium. set up and solve a differential equation that models this motion. write your solution in the form a cos ( ω t − α ) where α is a positive number. use your solution to fill in the information below: what is the amplitude of the motion? what is the value of ω ? what is the phase shift?

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.