A toy cork gun contains a spring whose spring constant is, Ask an Expert

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Q1. A 20 kg sits on a swing that hangs from 3.0m long chains. What is an initial speed before she makes an arc of 45 degrees before reversing back?

Q2. A small moon of the giant planet has an orbital period of 1.64 days and an orbital radius of 4.50 x 10^5 km. From these data, determine mass of the planet.

Q3. A toy cork gun contains a spring whose spring constant is 10.02 N/m. The spring is compressed 5.0 cm and then used to propel a 6.00 g cork. The cork, however, sticks to the spring for 1 cm beyond its unstretched length before separation occurs. The muzzle velocity of this cork is?

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