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Physics Quiz: Acceleration

Quiz by Mr.MD Showket Hasan

Grade 8
Science
Thailand Core Curriculum

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20 questions
Show answers
  • Q1
    1. According to Source 5, when does acceleration occur?
    When there is a change in velocity.
    Only when an object is speeding up.
    When an object is moving at high speed.
    When an object is at rest.
    30s
    SC8.FM.1
  • Q2
    2. What simple definition of acceleration is provided in Source 5?
    The speed with direction.
    The rate of change of velocity.
    The force acting on an object.
    The distance travelled over time.
    30s
  • Q3
    3. Which of these scenarios, described in Source 5, involves acceleration?
    None of the above.
    A plane travelling in a straight line at a constant speed of 1,000 kilometers per hour.
    A car travelling in a straight line at a constant speed of 80 kilometers per hour.
    A body moving at 30 kilometers an hour, then turning right while maintaining a speed of 30 kilometers per hour.
    30s
  • Q4
    4. What does Source 5 emphasize as a common misunderstanding about acceleration?
    That it only applies to objects moving in a straight line.
    That it is a scalar quantity.
    That it cannot occur when an object is slowing down.
    That it is solely related to high speed.
    30s
  • Q5
    5. Which of the following is a unit of acceleration, as discussed in Source 5?
    Kilometres per hour.
    Metres per second.
    Metres per second squared.
    Seconds.
    30s
  • Q6
    6. A car accelerates from rest to 20 metres per second in 5 seconds. What is its acceleration?
    4 metres per second squared.
    25 metres per second squared.
    10 metres per second squared.
    2 metres per second squared.
    30s
  • Q7
    7. A cyclist is travelling at a constant speed of 10 metres per second. They then apply the brakes and come to a complete stop in 2 seconds. What is their acceleration?
    5 metres per second squared.
    -2 metres per second squared.
    -5 metres per second squared.
    10 metres per second squared.
    30s
  • Q8
    8. A ball is thrown straight up in the air. At its highest point, its velocity momentarily becomes zero. Is the ball accelerating at this point?
    Only if it starts falling back down.
    Only if it is still moving upwards.
    Yes, because its direction is changing.
    No, because its velocity is zero.
    30s
  • Q9
    9. A car is travelling at a speed of 30 kilometres per hour. It makes a U-turn and continues travelling at 30 kilometres per hour in the opposite direction. Has its velocity changed?
    No, because its speed is constant.
    Yes, because its direction has changed.
    Only if it accelerated during the U-turn.
    Only if it slowed down during the U-turn.
    30s
  • Q10
    10. A train is travelling at a constant speed of 60 kilometers per hour. It approaches a station and slows down to 10 kilometers per hour. Is the train undergoing acceleration?
    No, because it is still moving.
    Yes, because its speed is decreasing.
    Only if it comes to a complete stop.
    Only if it changes direction.
    30s
  • Q11
    11. Source 5 states that "acceleration will only exist when there is a change in velocity." Why does a change in direction also imply a change in velocity, even if speed remains constant?
    Velocity is a vector quantity, incorporating both speed and direction. Any change in either component results in a change in velocity.
    Direction is irrelevant when considering velocity.
    Speed is the only factor that determines velocity.
    Only changes in speed cause acceleration.
    30s
  • Q12
    12. How does the understanding of acceleration refine our comprehension of motion beyond just speed and distance?
    It provides a deeper understanding of how forces influence changes in an object's motion, considering both speed and direction.
    It proves that all objects in the universe are constantly accelerating.
    It allows for precise calculation of an object's position at any given time.
    It introduces the concept of force as the cause of all motion.
    30s
  • Q13
    13. Source 5 mentions that "Acceleration and Velocity are in the same direction!" What does this statement imply about the relationship between acceleration and velocity?
    Acceleration can only occur when velocity is zero.
    When an object accelerates in a particular direction, its velocity changes in that same direction.
    Acceleration always acts in the opposite direction to velocity.
    Acceleration is independent of velocity.
    30s
  • Q14
    14. Can an object be accelerating even if its speed is constant? Explain your answer.
    No, acceleration requires a change in speed.
    Only if the object is slowing down.
    Only if the object is moving in a straight line.
    Yes, an object moving in a circle at constant speed is constantly accelerating due to its changing direction.
    30s
  • Q15
    15. Source 5 begins by describing familiar feelings associated with acceleration. Why is this an effective way to introduce the concept?
    It relies on subjective experiences, which are not reliable for scientific explanations.
    It focuses on the forces acting on objects, rather than the changes in their motion.
    It proves that acceleration is always present, even when we are not aware of it.
    It connects the abstract concept of acceleration to tangible, everyday experiences, making it more relatable and understandable.
    30s

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