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Vedmedyk [2.9K]

2 years ago

11

5. A weightlifter lifts a barbell of mass 50 kg to a height of 2m in 3s. (Take g = 9.8 m/s².) a) What is the weight of the barbe

ll? 5. A weightlifter lifts a barbell of mass 50 kg to a height of 2m in 3s . ( Take g = 9.8 m / s² . ) a ) What is the weight of the barbell ?

1 answer:

inysia [295]2 years ago

4 0

Answer:

490N

Explanation:

W=m×g

W=50×9.8=490N

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(b) If the force is constant, since the mass is constant and F = ma according to Newton's 2nd law, the acceleration on bullet is also constant

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