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A mass suspended by a spring is subjected to a triangular force impulse. At the initiation of the impulse, the force is 200N and decreases linearly to zero in τ/4 seconds (where τ is the natural period of the system). Determine the position of the mass at t = τ/2 seconds. The mass is 50kg and the spring constant is 96N/mm.
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A balloon behaves so the pressure is P = C2V1/3, C2 = 100 kPa/m. The balloon is blown up with air from a starting volume of 1 m3 to a volume of 3 m3. Find the final mass of air assuming it is at 25oC and the work done by the air.
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