Ok guys

this here is the physics results for the prac that isnt due at any time:
h = height
m = mass
l = length
a = acceleration
v = velocity
PE = potential energy
KE = Kinetic eng.

h of the ramp : 0.095 m
m of steel ball : 0.01635 kg
m of marble : 0.02525 kg
PE of steel ball : 0.0152 joules
PE of marlbe: : 0.0488 joules

v of steel ball when it leaves ramp: 1.862 m/s
horizontal l of ramp: 0.2 m
l of flat part of ramp at the end: 0.08m

l or ramp: 0.221 m

a of ball down the ramp: 7.87m/s^2

horizontal l of distance from the ramp to where the ball hit the floor: 0.87 m
t for ball to leave ramp and hit the floor: 0.467 s

everything for question 4 I made up xD