Question

The weight of a man in a lift moving up is 708N while the weight while the weight of the same man in the lift moving down with same acceleration is 468N . His normal wieght is​

Answer 1

Answer:

-312 normal force downwards

Explanation:

upward force = downward force

-760+468=-312

Answer 2

The normal weight of the man is N.

Given: The weight of a man in a lift moving up is 708N while the weight of the same man in the lift moving down with the same acceleration is 468N.

To Find:

Solution:

If the lift moves with acceleration a.

The weight of a man in a lift moving upward is,

m(g+a)=708

mg+ma=708.         (1)

The wight of man in a lift moving downward is,

m(g−a)=468

mg−ma= 468.         (2)

Adding the equations (1) and (2), we get

2mg= 1176

mg= 588N

Therefore, the normal weight of a man is 588N.

#SPJ3