Inietotviz
Answered

please... really need help. :) how much work is done by the gravitational force when 265 kg pile driver falls 2.80 m?

Sagot :

Vjlomocsoviz
[tex]Work = Fdcos[/tex]θ 
[tex]Weight = mg[/tex]

θ = 0 because the direction of motion is the same as the direction of the force
[tex]Work = (265)(9.8)(2.8)(cos 0)[/tex]

answer = 7 271.6 (kg.m²/s²)