P5

• What is a scalar quantity?

  A physical quantity with only magnitude
• What does the gradient of a line on a distance-time graph represent?

  Speed
• What is acceleration?

  Rate of change in velocity
• What are the two types of deformation discussed in the video?

  Elastic and inelastic deformation
• What is the magnitude of a scalar quantity?

  Its size or numerical value
• What is the unit of measurement for force?

  Newtons
• Why does a flat line on a distance-time graph indicate that the object is stationary?

  Because the gradient and speed are both zero
• What is the unit of acceleration?

  Meters per second squared
• Which of the following is a scalar quantity?

  Speed
• Why does an object need more than one force applied to it to stay still when being deformed?

  Otherwise, the object will just move as it is pulled or pushed
• What is a free body diagram?

  A diagram showing all forces acting on an object
• Why are forces considered vector quantities?

  Because they have both magnitude and direction
• What does the delta symbol (Δ) represent in physics?

  Change
• If a cyclist travels 20 meters in 2 seconds, what is her speed?

  10 meters per second
• Why is speed considered a scalar quantity?

  It has magnitude but no direction
• What is the term used to describe the increasing length of a spring when it is stretched?

  Extension
• Why are force arrows used in free body diagrams?

  To represent the magnitude and direction of forces
• What are the two main categories of forces?

  Contact and non-contact forces
• What does Δv represent in the context of acceleration?

  Change in velocity
• What does a straight line on a distance-time graph indicate about the speed?

  The speed is constant
• What are examples of scalar quantities?

  Distance, mass, temperature, time
• What are the four main forces acting on a plane in a free body diagram?

  Thrust, drag, weight, and lift
• How is Δv calculated?

  Final velocity minus initial velocity
• What does a curved line on a distance-time graph indicate about the speed?

  The speed is changing
• What is the key difference between contact and non-contact forces?

  Contact forces require physical touch, non-contact forces do not
• Why does the spring's natural length appear shorter than its actual length when hung from a support?

  Because the spring's own mass exerts a downward force, causing some extension
• What is a vector quantity?

  A physical quantity with magnitude and direction
• How is the magnitude of a force represented in a free body diagram?

  By the length of the force arrow
• What is the symbol used to represent the spring constant?

  k
• If a car accelerates from 15 m/s to 35 m/s in 5 seconds, what is its acceleration?

  4 m/s²
• Which of the following is an example of a contact force?

  Friction
• What is the difference between scalar and vector quantities?

  Scalar has magnitude only, vector has magnitude and direction
• How do you calculate the speed at a specific point on a curved line of a distance-time graph?

  Draw a tangent and calculate its gradient
• Which of the following is a vector quantity?

  Velocity
• Is speed a scalar or vector quantity?


  Scalar
• Why can acceleration be negative?

  It indicates deceleration or slowing down
• What unit is used to label the magnitude of forces in a free body diagram?

  Newtons
• Why is air resistance considered a contact force?

  Because the object must touch air particles to feel resistance
• Why is displacement a vector quantity?

  It has both magnitude and direction
• What does the spring constant (k) tell us about a material?

  How many newtons it takes to stretch the material by one meter