You lift a 194 n package to a height of 3.2 meters in 8.6 seconds. (a) how much work did you do? (b) what is your power?

Given that:

Force (F) = 194 N ,

height (h) = 3.2 m = displacment

time (t) = 8.6 s ,

Determine a). Work = ?        b). Power = ?

                 a). Work = F × displacement

                                = 194 × 3.2

                              W = 620.8 J

                  b). Power (P) = Work ÷ time

                                          = 620.8 ÷ 8.6

                                       Power = 72.19 Watts

L=F*d

F=G=194 N

L=F*d=194*3.2=620.8 J

P=L/t=620.8/8.6=72.18 W

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

b. preoperational

just took it