The jet plane has a mass M and a horizontal velocity v₀ when t = 0. If both engines provide a horizontal thrust which varies as shown in the graph, determine the plane’s velocity at time t₁. Neglect air resistance and the loss of fuel during the motion.

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Units Used: Mg kN = 10³ Given: 10³ M = 250 Mg V0 = 100 vo t1 = 15 s b = 2 kg N a = 200 KN KN 2 S S