Question

A horizontal board of negligible thickness and area 1. 0 m2 hangs from a spring scale that reads 70 n when a 4. 0 m/s wind moves above the board. The air below the board is stationary. When the wind stops, the scale reads answer n. The density of air is 1. 25 kg/m3 and treat the air as an ideal fluid.

Answer 1

A horizontal board of negligible thickness and area 2.0 m2 hangs from a spring scale that reads 80 N when a 4.0 m/s wind moves beneath the board

Step-by-step explanation: