Small ramps, toy cars, stop clocks, old textbooks, metre rules

Laptop and dataharvest with 2 light gates per group, ramps, cars, black card, scissors, blu tak, metre rules
 

v. large measuring cylinders or long plastic pipes with wall paper paste full to same level, 26 pieces of plasticine all of same mass and approximately size of a golf ball, stopclocks, metre rules.

Exploring Science 9