Calculate the approximate force on a five square meter of sail, given the horizontal velocity of the wind is 5.00 m/s pa

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Calculate the approximate force on a five square meter of sail,given the horizontal velocity of the wind is 5.00 m/s parallel toits front surface and 2.50 m/s along its back surface. Take thedensity of air to be 1.2 kg/m3 .
A) 56.2 N
B) 15.3 N
C) 42.8 N
D) 68.5 N
Suppose a meter stick made of brass and one made of copper arethe same length at 20 degree C. What is their difference in lengthat 100 degree C? Coefficient of linear expansion is19x10-6 1/degree C for brass and 17x10-6 1/degree C for copper.
A) 0.16 mm
B) 0.21 mm
C) 0.09 mm
D) 0.31 mm