State the sum, a+ b+ d, in unit vector notation

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Q1. The coefficient of kinetic friction between a 78kg box and a warehouse floor is 0.21. How much force is necessary to keep the box, moving at constant velocity across the floor?

Q2. A particle undergoes a displacement Δr of magnitude 57 m in a direction 25° below the x axis. Express Δr in terms of the unit vectors x and y.

Q3. Consider the vectors in the figure below, in which the magnitudes of A, B, C, and D are respectively given by 57 m, 76 m, 38 m, and 57 m. state the sum, A+ B+ D, in unit vector notation.

Reference no: EM137817

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