Kinematics

• What is the formula for calculating speed?


  The formula for speed is $s =$$\frac{d}{t}$.
• What do the variables in the equations of motion represent?


  • $v$: final velocity
  • $u$: initial velocity
  • $a$: acceleration
  • $t$: time
  • $s$: displacement
• What does the area under an acceleration-time graph represent?


  The area under an acceleration-time graph represents change in velocity.
• What does the area under a velocity-time graph represent?


  The area under a velocity-time graph represents displacement.
• What does the slope of a velocity-time graph represent?


  The slope of a velocity-time graph represents acceleration.
• What does the slope of a position-time graph represent?


  The slope of a position-time graph represents velocity.
• If a car increases its velocity from 10 m/s to 30 m/s in 5 seconds, what is its acceleration?


  $a =$$\frac{30 \, \text{m/s} - 10 \, \text{m/s}}{5 \, \text{s}} =$$4 \, \text{m/s}^2$
• If you walk 3 m east and then 4 m west, what is your displacement?


  Your displacement is 1 m west.
• What does position refer to in kinematics?


  Position refers to where an object is located in space, usually relative to a reference point.
• What is the definition of kinematics?

  Kinematics is the branch of physics that describes the motion of objects without considering the forces that cause the motion.
• What are the key aspects of kinematics?


  The key aspects of kinematics include position, displacement, velocity, and acceleration.
• If a car accelerates uniformly from rest to a speed of 20 m/s over a distance of 50 m, what is its acceleration?


  $a =$$4 \, \text{m/s}^2$