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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 2 kg object is lifted 5 meters above the ground. What is its gravitational potential energy? (g = 10 m/s²)

    Answer: 100 J

    Gravitational PE = mgh = 2 × 10 × 5 = 100 J.

  2. Which of the following best describes the Law of Conservation of Energy?

    Answer: Total energy in an isolated system remains constant

    The Law of Conservation of Energy states that energy cannot be created or destroyed; the total energy of an isolated system remains constant.

  3. What type of wave requires a medium to travel through?

    Answer: Mechanical wave

    Mechanical waves, such as sound and water waves, require a medium (solid, liquid, or gas) to propagate, unlike electromagnetic waves which can travel through a vacuum.

  4. In a wave, what is the distance between two consecutive crests called?

    Answer: Wavelength

    Wavelength is the distance between two consecutive points in phase on a wave, such as from crest to crest or trough to trough.

  5. A 4 kg object has a kinetic energy of 50 J. What is its approximate speed?

    Answer: 5 m/s

    KE = ½mv², so 50 = ½(4)v², giving v² = 25 and v = 5 m/s.

  6. Which color of visible light has the highest frequency?

    Answer: Violet

    Violet light has the highest frequency (and shortest wavelength) in the visible spectrum, while red light has the lowest frequency.

  7. When a wave moves from deep water to shallow water, what happens to its speed?

    Answer: It decreases

    Water waves slow down when moving from deep to shallow water because the wave interacts more with the ocean floor, reducing wave speed.