Hi! I need some help plzz!

Emmett is lifting a box vertically. Which forces are necessary for calculating the total force?

Fp, Ff, and Fg
Fp and FN
Fp, Fg, and Ff
Fp and Fg

Question

Hi! I need some help plzz!

Emmett is lifting a box vertically. Which forces are necessary for calculating the total force?

Fp, Ff, and Fg
Fp and FN
Fp, Fg, and Ff
Fp and Fg

anonymous · Answer

If Fp is referring to "force of Emmett" then it should be the last choice.

Lifting vertically will not have any frictional force Ff. The normal force FN also isn't important.