Two pucks, each of mass m, are connected by a massless string of length 2l as illustrated below. the pucks lie on a horizontal, frictionless sheet of ice. the string is initially straight (i. e., θ = 90o ). a constant, horizontal force f is applied to the middle of the string in a direction perpendicular to the line joining the pucks. when the pucks collide, they stick together. how much mechanical energy is lost in the collision?

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.

Area around a charged object where the objects can exert a force on another charged objects is an electric

Abasketball star covers 2.65 m horizontally in a jump to dunk the ball. his motion through space can be modeled precisely as that of a particle at his center of mass. his center of mass is at elevation 1.02 m when he leaves the floor. it reaches a maximum height of 1.90 m above the floor and is at elevation 0.910 m when he touches down again. (a) determine his time of flight (his "hang time"). (b) determine his horizontal velocity at the instant of takeoff. (c) determine his vertical velocity at the instant of takeoff. (d) determine his takeoff angle. (e) for comparison, determine the hang time of a whitetail deer making a jump with center-of-mass elevations yi = 1.20 m, ymax = 2.45 m, and yf = 0.750 m.