Corey, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 850 n for the first 3.0 s after the elevator starts to move, then 930 n for the next 3.0 s. what is the elevator's velocity 4.0 s after starting?

The final velocity of the elevator after 4 seconds is 2.571 m/s.

The given parameters;

The weight of Corey is calculated from Newton's second law of motion;

W = mg

W = 95 x 9.8

W = 931 N

The initial velocity of Corey is calculated as follows;

W - F₁ = ma

931 - 850 = ma

81 = ma

The acceleration from the second scale reading is calculated as;

W - F₂ = ma

The final velocity of the elevator after 4 seconds is calculated as follows;

Thus, the final velocity of the elevator after 4 seconds is 2.571 m/s.

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