Answers edited by Wricheek

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• A spring with a constant of #4 (kg)/(s^2)# is lying on the ground with one end attached to a wall. An object with a mass of #4 kg # and speed of # 8 m/s# collides with and compresses the spring until it stops moving. How much will the spring compress?
  
• If a rocket with a mass of #700 kg# vertically accelerates at a rate of # 3/2 m/s^2#, how much power will the rocket have to exert to maintain its acceleration at 4 seconds?
  
• Question #578ec
  
• How do you calculate the potential 10-kg sack of groceries on a shelf 1 m above the floor?
  
• #int sqrt((a+x)/(a-x))dx#?
  
• How do you work out the total translational kinetic energy of N2 gas?