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Physical Sciences Flashcards

8 cards from real MATRIC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 8 Physical Sciences flashcards as text

  1. What is the SI unit of force?

    Answer: Newton

    Force is measured in newtons (N), defined as the force that gives a 1 kg mass an acceleration of 1 m·s⁻².

  2. An object of mass 5 kg accelerates at 2 m·s⁻². What is the net force acting on it?

    Answer: 10 N

    Newton's second law: F = ma = 5 × 2 = 10 N.

  3. Which of the following is the chemical formula for water?

    Answer: H₂O

    Water consists of two hydrogen atoms and one oxygen atom, written as H₂O.

  4. What type of bond forms between a metal and a non-metal through the transfer of electrons?

    Answer: Ionic bond

    Ionic bonds form when electrons transfer from a metal to a non-metal, creating oppositely charged ions that attract.

  5. Calculate the work done when a force of 20 N moves an object 4 m in the direction of the force.

    Answer: 80 J

    Work = force × distance = 20 × 4 = 80 J.

  6. What is the acceleration due to gravity near the Earth's surface (used in Grade 12)?

    Answer: 9.8 m·s⁻²

    The value of gravitational acceleration used in the NSC syllabus is 9.8 m·s⁻² directed downwards.

  7. In the reaction 2H₂ + O₂ → 2H₂O, what is the type of reaction?

    Answer: Synthesis (combination)

    Two reactants combine to form a single product, which is a synthesis (combination) reaction.

  8. Which quantity is a vector?

    Answer: Velocity

    Velocity has both magnitude and direction, making it a vector. Speed, distance and mass are scalars.