Aball starts at the top of a ten-story building, falls straight down, and hits the ground with a velocity bottom. how does that velocity change if it falls down a ramp at an angle of 45 degrees? how does that velocity change if it falls down a ramp that goes down, around, over, left, right, upside-down, makes a loop, goes up, down, and finally reaches the ground?

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z

Often called simply "velocity," this is the velocity of an object at a particular moment in time.

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants