mechanics 1

• What is the formula for speed?


  SPEED = DISTANCE/TIME
• What does average speed represent?

  Speed averaged over a span of time
• What is instantaneous speed?

  Speed at any instant during total time
• What is the average walking speed?

  1.5 m/s
• What is the average running speed?

  3 m/s
• What is the average cycling speed?

  6 m/s
• What does speed indicate about an object's movement?

  How fast something is moving
• How does velocity differ from speed?

  Velocity includes direction; speed does not
• What is displacement?

  Distance in a given direction
• What does the slope of a velocity-time graph represent?

  The acceleration of an object
• How is acceleration defined?

  Change in velocity over time
• What are the units for acceleration?

  m/s²
• What does a horizontal line on a distance-time graph indicate?

  The object is stationary
• What does a curve of increasing slope on a distance-time graph indicate?

  The object is accelerating
• What does a curve of decreasing slope on a distance-time graph indicate?

  The object is decelerating
• What does a horizontal line on a velocity-time graph indicate?

  Constant velocity
• What does a downward diagonal line on a velocity-time graph indicate?

  Deceleration
• What does the area under a velocity-time graph represent?

  The distance traveled by the object
• How can you find the distance traveled from a velocity-time graph?

  Calculate the area under the graph
• What is the formula for the area of a triangle?

  Area = ½ x base x height
• What is the equation relating final velocity, initial velocity, acceleration, and distance?

  V² - u² = 2aS
• What does the equation V² - u² = 2aS represent?

  Relationship between velocity, acceleration, and distance
• What does 'u' represent in the equation V² - u² = 2aS?

  Initial velocity
• What does 'V' represent in the equation V² - u² = 2aS?

  Final velocity
• What does 'a' represent in the equation V² - u² = 2aS?

  Acceleration
• What does 'S' represent in the equation V² - u² = 2aS?

  Distance
• How does a velocity-time graph differ from a distance-time graph?

  Velocity-time graphs show speed and direction
• What can be inferred from the shape of a velocity-time graph?

  It indicates the object's acceleration or deceleration
• How do you determine acceleration from a velocity-time graph?

  Find the slope of the graph
• What does a straight line on a velocity-time graph indicate?

  Constant acceleration
• What does a curve on a velocity-time graph indicate?

  Changing acceleration
• What does a straight horizontal line on a distance-time graph indicate?

  The object is stationary
• What does a straight diagonal line on a distance-time graph indicate?

  The object is moving at constant speed
• What does a steep slope on a distance-time graph indicate?

  The object is moving quickly
• What does a gentle slope on a distance-time graph indicate?

  The object is moving slowly
• How can you tell if an object is accelerating from a distance-time graph?

  By observing a curve in the graph
• How can you tell if an object is decelerating from a velocity-time graph?

  By observing a downward slope in the graph
• How do you calculate the distance traveled if the velocity is changing?

  Use the area under the velocity-time graph
• What does a curve on a distance-time graph indicate?

  The object is accelerating or decelerating
• What does a straight line on a velocity-time graph indicate?

  Constant velocity