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Physics Flashcards

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

Read the first 7 Physics flashcards as text

  1. A car accelerates from rest to 20 m/s in 5 seconds. What is its acceleration?

    Answer: 4 m/s²

    Acceleration = change in velocity / time = (20 - 0) / 5 = 4 m/s².

  2. According to Newton's First Law, an object at rest will remain at rest unless:

    Answer: a net external force acts on it

    Newton's First Law (inertia) states that objects remain in their state of motion unless acted upon by a net external force.

  3. A 10 kg object is pushed with a net force of 30 N. What is its acceleration?

    Answer: 3 m/s²

    Newton's Second Law: F = ma, so a = F/m = 30/10 = 3 m/s².

  4. Which of the following is a scalar quantity?

    Answer: Speed

    Speed is a scalar quantity because it has magnitude only, while velocity, force, and displacement are vectors with both magnitude and direction.

  5. A ball is thrown horizontally from a cliff. Which statement about its motion is correct?

    Answer: Vertical acceleration is 9.8 m/s² downward

    Gravity causes a constant vertical acceleration of 9.8 m/s² downward, while horizontal velocity remains constant (projectile motion).

  6. When two objects collide and stick together, what type of collision has occurred?

    Answer: Perfectly inelastic collision

    A perfectly inelastic collision occurs when two objects collide and stick together, moving as one unit afterward, with maximum kinetic energy loss.

  7. What is the momentum of a 5 kg object moving at 8 m/s?

    Answer: 40 kg·m/s

    Momentum p = mv = 5 kg × 8 m/s = 40 kg·m/s.