Equation of a straight line
If the coefficients a and b of the equation of a straight line ax + by = 0 are two distinct digits from the numbers {0, 1, 2, 3, 6, 7}, then how many distinct straight lines are possible?
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A 50-cm x 30-cm x 20-cm block weighing 150 N is to be moved at a constant velocity of 0.8 m/s on an inclined surface of 20 degrees, with a friction coefficient of 0.27. Determine the force F that needs to be applied in the horizontal direction.
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