forces

• What is a scalar quantity?

  It only has size (magnitude)
• What is a vector quantity?

  It has both size and direction
• Is force a vector or scalar quantity?

  Force is a vector quantity
• What is a contact force?

  A push or pull due to interaction
• What is a non-contact force?

  A force acting at a distance
• What is the same about the interaction pair of forces when two objects interact?

  The forces are the same size
• What is different about the interaction pair of forces when two objects interact?

  The forces are in opposite directions
• What is the size of the resultant force on an object when the forces are balanced?

  The resultant force is zero
• What is the name for the force acting on an object due to gravity?

  Weight
• What instrument can be used to measure the weight of an object?

  Calibrated spring balance (newtonmeter)
• What is the centre of mass?

  The point through which weight acts
• What is elastic deformation?

  Object returns to original shape after force
• What is inelastic deformation?

  Object does not return to original shape
• How do you find the spring constant from a force-extension graph of a spring?

  Find the gradient of the straight line
• What is the turning effect of a force called?

  Moment
• What can you say about clockwise and anticlockwise moments on a balanced object?

  They are equal in size
• How does a lever reduce the amount of force needed to create a particular sized moment?

  By increasing the distance from the pivot
• What happens to the moment of a force when a small gear drives a large gear?

  The moment is increased
• What is the relationship between the sum of all clockwise moments and anticlockwise moments about any point in a balanced object?

  They are equal
• What is the purpose of measuring the extension of a spring in an experiment?

  To determine the spring constant
• What is required to ensure accurate measurements in a spring experiment?

  Measure using a calibrated instrument
• What should be ensured about the spring during measurements?

  It should be in a vertical position
• What is the significance of applying forces in a specific direction to the spring?

  To ensure accurate extension measurements
• What is the importance of using parallel forces in a spring experiment?

  To maintain consistent force application
• What should be done to ensure the spring is not damaged during the experiment?

  Apply forces gradually
• What is the effect of using a large force on a small spring?

  It may permanently deform the spring
• What happens to the spring's extension when a larger force is applied?

  The extension increases proportionally
• What is the relationship between force and extension in a spring?

  They are directly proportional
• What is the significance of the spring constant?

  It measures the stiffness of the spring
• What is the effect of temperature on the spring constant?

  The spring constant may decrease
• What is the role of gamma tracers in medical imaging?

  They help visualize internal structures
• What is the significance of resistance in a circuit?

  It limits the flow of electric current
• What is the role of tension in a rope?

  It transmits force along the rope
• What is the normal contact force?

  It acts perpendicular to the surface
• What is friction?

  It opposes the motion between surfaces
• What is gravitational force?

  It attracts objects towards each other
• What is the significance of magnetic separation?

  It separates materials based on magnetic properties
• What is the role of a spring in a mechanical system?

  It stores and releases energy
• What is the effect of applying a force to a spring?

  It causes the spring to extend
• What is the relationship between force and extension in Hooke's Law?

  Force is proportional to extension