Physics- forces

• Why is speed a scalar quantity

  Because it only has a magnitude
• What is resultant force

  If multiple forces act at the same point, we consider them as one single forces that has the the same effect as all the original forces acting together
• All the forces on an object are balanced. what is the resultant force of the object

  0N
• what is Elasticity 


  Elasticity is the property if an object which tells you if it’s able to return to its original shape after the force is removed
• The extension of an elastic object is what to the force applied to the object

  Directly proportiona
• Why do fluids have pressure

  Because the particles exert a force on Whatever container the fluid is in
• What happens when an object is submitted in a liquid

  It experiences pressure due to the the pressure in the liquid
• A potato is submerged in bucked Of water. The potato is more dense than water. State whether the potato will sink or float

  The potato will sink

  this is because the density of the potato is more than water, so the weight of the potato will be more than the weight of the displaced water

  the force of the weight overcomes the upthrust and the potato sinks
• what happens when an object is dropped

  • It initially accélérâtes due to the gravitational force because this exceeds the drag force. There is a resultant force Downwards
  • As the object‘s speed increases, so does the drag
  • this continues until the drag force is equal To the force due to gravity. because the forces are balanced, there is no resultant force and the now the object moves at constant