Ben pumpiniron applies an upward force to lift a 129-kg barbell to a height of 1.98 m at a constant speed. how much work has been done?

The work has Been done is 2503.12 J .

Step-by-step explanation:

Formula for workdone is given by

Workdone = Force × Distance

As w = mg

Where m is the mass , g is the acceleration of gravity .

As given

Ben Pumpiniron applies an upward force to lift a 129-kg barbell to a height of 1.98 m at a constant speed.

m = 129 kg

g = 9.8 m / s²

Putting in the w =mg

w = 129 × 9.8

   = 1264.2 kg m / s²

(As given in the question force is constant thus force doing the work is equal to weight .)

Thus

Force = 1264.2 kg m / s²

Workdone = Force × Distance

                   = 1264.2 × 1.98

                   = 2503.12 J (Approx)

Therefore the work has Been done is 2503.12 J .

80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh