A physics student observes a ball as it roll's down a ramp. She collects the following data.
mass = 38 grams
acceleration = 2 m/s2
initial velocity = 0 m/s
final velocity =l6 m/s
radius = 4 cm
How long did it take to roll down the ramp?

How is acceleration calculated? a. initial velocity - final velocity / timeb. initial velocity + final velocity / timec. final velocity - initial velocity / timed. final velocity / timele select the best answer from the choices provided0oood00save and exitnextmark this and return

Which changes of state do the labels represent? a: b: c:

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.