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 Bee

Question

3 years ago

7

n done?

2 answers:

Varvara68 [4.7K] · Answer 1 · 2022-08-28T14:29:51+03:00

Answer:

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 .

vodomira [7] · Answer 2 · 2022-08-28T15:43:26+03:00

Step-by-step explanation:

Work done = Force x Displacement

Force = Weight of pumpkin

Weight of pumpkin = Mass of pumpkin x Acceleration due to gravity

Weight of pumpkin = 129 x 9.81 = 1265.49 N

Height to which pumpkin is displaced = 1.98 m

Displacement = 1.98 m

Work done = Force x Displacement

Work done = 1265.49 x 1.98

Work done = 2505.67 J

Work done is 2505.67 J