3 years ago

A weightlifter is holding a 200-kg barbell at a height of 1 meter

Physics

2 answers:

nadya68 [22]3 years ago

7 0

Answer:

Explanation:

d=0 barbell isn't moving

Tems11 [23]3 years ago

6 0

Answer: 1960 joules

Explanation:

Given that:

Mass of barbell = 200-kg

Height = 1 meter

Work done by weightlifter = ?

Recall work is done when force is applied on an object over a distance.

i.e Workdone = Force X Distance h

(Since force = Mass m x gravitational acceleration g)

Workdone = mgh

= 200kg x 9.8ms^2 x 1m

= 1960 joules

Thus, 1960 joules of work is performed by the weightlifter.

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