Question

-2 points SerpSE 10 5 ca 013. A weightlifter stands on a bathroom scale. He pumps a barbell up and down. What happens to the reading on the scale as he does so? (Select all that apply.) O The scale reads larger when the weightlifter pushes up 0 The scale reads smaller when the weightlifter pushes up. The scale reading doesn't change when the weightlifter pushes up The scale reading doesn't change when the weightlifter lowers the barbell D The scale reads larger when the weightlifter lowers the barbell The scale reads smaller when the weightlifter lowers the barbell. What if he is strong enough to actually throw the barbell upward? How does the reading on the scale vary now? This answer has not been graded yet Need Help? Read it

Answer 1

1) True

2) False

3) False

4) False

5) True

6) False

when weightlefter exerts force on barbell upward the barbell exert force on the weightlifter donward.

Because of this reason when he pumps barbell up and down the scale reads larger.