2.2. Kinematics

    Cards (138)

    • Displacement is a vector quantity measured in meters
    • What is acceleration measured in?
      m/s²
    • Velocity is a scalar quantity.
      False
    • Instantaneous velocity describes motion over time periods.
      False
    • What is the acceleration of a car that increases its velocity from 0 m/s to 10 m/s in 5 seconds?
      2 m/s²
    • A car travels 500 m north and then 300 m south. What is the total distance covered?
      800 m
    • The cyclist's velocity is 0.5 km/min east.
      True
    • Instantaneous velocity describes motion at a specific moment.

      True
    • A car covers 100 meters in 10 seconds. What is its average velocity?
      10 m/s
    • The equation for velocity-time is v=v =u+ u +at at
    • A car accelerates from 0 m/s to 20 m/s in 5 seconds. What is its displacement?
      50 m
    • The displacement-time equation relates displacement, initial velocity, acceleration, and time.
      True
    • What is the acceleration of a car that goes from 0 m/s to 20 m/s in 5 seconds?
      4 m/s²
    • What does the velocity-time equation relate?
      v, u, a, t
    • How many variables do you need to know to apply the equations of motion?
      3
    • The acceleration of the car in the third example is 4 m/s².

      True
    • The displacement-time equation relates displacement, initial velocity, acceleration, and time.
    • The final velocity of the car in the sixth example is 20 m/s
    • In free fall, the acceleration due to gravity is approximately 9.8 m/s².
    • The velocity-displacement equation in free fall is v2=v^{2} =u2+ u^{2} +2gs 2gs.

      True
    • What is the displacement of the ball after 2 seconds in the free fall example?
      -19.6 m
    • What replaces acceleration in the equations of motion for free fall?
      Acceleration due to gravity
    • What is the velocity-displacement equation for free fall?
      v2=v^{2} =u2+ u^{2} +2gs 2gs
    • The acceleration due to gravity is approximately 9.8 m/s².

      True
    • Match the quantity with its description:
      Scalar ↔️ Magnitude only
      Vector ↔️ Magnitude and direction
    • Scalar quantities have both magnitude and direction.
      False
    • A cyclist rides 10 km east in 20 minutes. What is their speed in km/min?
      0.5 km/min
    • How is instantaneous velocity calculated?
      Derivative of displacement
    • What is the definition of instantaneous velocity?
      Velocity at a specific moment
    • The formula for average velocity is \bar{v} = \frac{\Delta x}{\Delta t}</latex>

      True
    • At 5 seconds, a ball's velocity is dxdt=\frac{dx}{dt} =15 15 m/s. What is its instantaneous velocity?

      15 m/s
    • The displacement-time equation relates ss, uu, aa, and t
    • The displacement-time equation is s=s =ut+ ut +12at2 \frac{1}{2}at^{2}. For the car in the example, the displacement is 50 meters.
    • To apply the equations of motion, you need to know at least 3 of the 5 variables: s, u, v, a, t.
      True
    • What is kinematics the study of?
      Motion without considering forces
    • A car travels 100 meters north in 10 seconds. Its average velocity is 10 m/s north.
    • A car travels 500 m north and 300 m south. Its displacement is 200 m north.
    • Instantaneous velocity is determined by the derivative of displacement with respect to time.
    • Scalar quantities have magnitude only.
    • Vector quantities have both magnitude and direction.

      True
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