Question

repede varog!!!! Dau coronița ​

Answer 1

Răspuns:

5. Ep=mgh

Ep=1kJ=1000J

1000J=10*10*h => h=10m

6. Ec=mv²/2

Ec=200J

mv²/2=200J

v=d/t <=> v=100/10=10m/s

m*10²/2=200 <=> 50m=200 => m=4kg

Answer 2

Răspuns:

Salut

Problema 5.

Ep=m•g•h

1kJ=1000J

1000J=10kg•10N/kg•h

h=1000N•m/100N=10m.

Problema6.

Ec=m•v²/2

Ec=200J

m•v²/2=200J

v=d/t

v=100/10=10m/s

m•10²/2=200

50m=200

m=4kg.

==evergreen==