forces

• what forces are acting up on an airoplane as it accelerates

  • thrust
  • friction
  • air resistance
  • thrust has the bigger arrow
• an airplane moves forward 300kn due to thrust while 300kn of air resistance acting up on it.Describe it's motion

  • moves in the direction of the thrust
  • at a constant velocity
• if the same airoplane slows thrust decreases to 200kn what happens

  • the plane will decelerate because there's a backward resultant force of 100kn
• name two quantities that are constant in circular motion

  • speed magnitude of the force
• how the forces on a persons foot allow them to walk on the ground

  • one force pushes the ground backwards from the foot
  • one foot pushes the foot forward the ground
  • Force are equal and opposite
• why doesn't the earth move backwards when we walk on it

  • we exert a small force on the earth but it's negligible so the accleration is small
  • person with the foot is smaller than the earth so they receive a much larger accleration
• why does she keep unused masses on top of the trolly

  • the the total weight remains the same so the acclerations remains constant

  
• what does the direction of centrpedal accleration look like 


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