Question

The weight of a man in a lift moving upwards is 608n, while the weight of the same man in the lift moving downwards with same acceleration is 368n. His normal weight in newtons is??

Answer 1

Answer:

Explanation:

Weight of a man in a lift moving upwards is = 608n (Given)

Weight of a man in a lift moving downwards is = 368n (Given)

Let the lift is moving with acceleration = a,

If the lift is moving upwards with acceleration a, then m (g+a) = 608N --- 1                          

If the lift is moving downwards with an acceleration a, then m(g−a) =368N --- 2                          

Adding the equations (i) and (ii), we get

2mg = 608+368

2mg = 976  

mg = 488kg

Thus, the normal weight in newtons is 488kg

Answer 2

Answer:

Explanation:

Weight of a man in a lift moving upwards is = 608n (Given)

Weight of a man in a lift moving downwards is = 368n (Given)

Let the lift is moving with acceleration = a,

If the lift is moving upwards with acceleration a, then m (g+a) = 608N --- 1

If the lift is moving downwards with an acceleration a, then m(g−a) =368N --- 2

Adding the equations (i) and (ii), we get

2mg = 608+368

2mg = 976

mg = 488kg