Find the ratio of pA/pB, when A is a 5.0 kg rock falling 10 meters to the ground and B is a 1.0 kg apple falling 10 meters to the ground.(Compare their momenta just before they hit the ground.)

pA/pB = 5.00

Explanation:

To find the ratio pA/pB you first calculate the velocities of both rocks just before they hit the ground. You use the following formula:

  (1)

vo: initial velocity = 0

g: gravitational acceleration = 9.8m/s^2

y: height = 10m

The parameters y, g and vo are the same for both rocks, hence the velocity is the same, v = vA = vB. Next, it is not necessary to calculate the velocities because these are canceled in the ration for the momentum:

finally, you replace the values of the masses and you obtain:

hence, the ratio is 5.0

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it