1 Cup
Drill 2 holes, on opposite sides, 1/4" in diameter
Test #1
Cover the 2 holes with fingers
Fill with water
Place on level surface (not prerequisite)
Uncover holes by removing finger
Water will pour out of holes due to Gravity
Test #2
Cover the 2 holes with fingers.
Fill with water
Drop cup at shoulder height (not prerequisite) by releasing fingers covering 2 holes
Cup and water will fall, with no water pouring out through 2 holes
Newton's 2nd Law
Fnet=m*a
Acceleration of Gravity on Earth
9.8 m/s/s
a=change in velocity/Time
Earth's Gravitational Field Strength
9.8N/kg
a=Fnet/m