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Q1. Two packages at UPS start sliding down a ramp 40 degrees from the horizontal, Package A is sliding down in front of Package B. Package A has a mass of 3.50 and a coefficient of kinetic friction of 0.220. Package B has a mass of 8.00 and a coefficient of kinetic friction of 0.180. How long does it take package A to reach the bottom?

Q2. Transverse waves travel with a speed of 155m/s in a string under tension of 72.0N. What tension is required for a wave speed of 166m/s in the similar string?

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