Alightweight object and a very heavy object are sliding with equal speeds along a level frictionless surface. they both slide up the same frictionless hill. which rises to a greater height

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it

0 = 0.40 / 0 = 0

= 0.20 = 9.80 ⁄2 =?

=0 , = = 0.20 =0.50 0 0.40 ⁄

=0−122 =0−12(9.80 ⁄2)(0.50)2 =1.2