A client performs 8 repetitions of seated leg press at 320 lbs what is the estimated 1rm

400 lbs To calculate 1RM you need to divide the number of repetition by 30, add 1 and multiply the weight you were lifting or you could use the formula, 1 RM = W * ( 1 + R / 30)

car a and b are moving in opposite directions

plz mark.me the brainliest i rlly need this kind of yours in exchange

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.