1) toy gun fires a 120 g projectile disc by using a compressed spring (k= 1700N/m)

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1) toy gun fires a 120 g projectile disc by using a compressed spring (k= 1700N/m). The barrel of the gun is 5.0 cm. As the projectile goes down the barrel, it creates thermal energy due to friction. The frictional force is 0.13N. You compress the spring 84mm 1) What is the disc's speed when it leaves the barrel of the gun 2) What would be the disc's max height if shot straight up (assuming a vacuum)