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M(g-a)

70 x 10-1.5

595

The correct answer is A. 105 N.

595 N is the apparent weight of the man. The question requires the apparent weight loss.

i.e. (70 x 10) - 595 = 105 N.

The answer is C becos what is asked is the apparent weight on an elevator moving downward

The apparent weight of the man when the lift moves downward is:

\(W = M(g - a)\)

\(= 70(10 - 1.5)\)

\(= 70 \times 8.5 = 595\text{N}\)

Therefore the answer is C.

Given: \(w = 70\text{kg}\), \(a = 1.5\text{m/s}^2\)

when \(m = w\)

\(F = ma\)

\(F = 70 \times 1.5 = 105\text{N}\)