Physics end of year yr 10 Flashcards
(91 cards)
1
Q
Q: What is the equation for acceleration?
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2
Q
A: Acceleration = (Final velocity – Initial velocity) ÷ Time
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3
Q
Q: What does Newton’s First Law state?
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4
Q
A: An object will stay at rest or move at a constant speed unless acted on by a resultant force.
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6
Q
Q: What is inertia?
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7
Q
A: The tendency of objects to resist changes in motion.
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9
Q
Q: What is the unit of force?
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10
Q
A: Newton (N)
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11
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12
Q
Q: What is the formula for force?
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13
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A: Force = Mass × Acceleration
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15
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16
Q
Q: What is the principle of conservation of energy?
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17
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A: Energy cannot be created or destroyed
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only transferred or stored.
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19
Q
Q: What is the formula for kinetic energy?
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20
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A: KE = ½ × mass × speed²
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21
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22
Q
Q: What is the formula for gravitational potential energy?
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23
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A: GPE = mass × gravity × height
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Q: What is meant by wasted energy?
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A: Energy that is not usefully transferred and usually spreads as heat or sound.
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Q: What is the unit of energy?
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A: Joule (J)
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Q: What type of wave is sound?
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A: Longitudinal wave
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Q: What type of wave is light?
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A: Transverse wave
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Q: What is the wave speed formula?
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A: Wave speed = frequency × wavelength
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Q: What happens to a wave during refraction?
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A: It changes speed and direction when it enters a different medium.
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Q: What is frequency measured in?
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A: Hertz (Hz)
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Q: Which EM wave has the shortest wavelength?
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A: Gamma rays
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Q: Which EM wave is used for communication with satellites?
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A: Microwaves
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Q: What happens to light when it enters a denser medium?
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A: It slows down and bends towards the normal.
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Q: What part of the EM spectrum is used in medical imaging?
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A: X-rays
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Q: What does a higher frequency mean in EM waves?
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A: More energy and shorter wavelength
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Q: What is a half-life?
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A: The time it takes for half the radioactive nuclei to decay.
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Q: Which radiation is most ionising?
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A: Alpha radiation
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Q: Which type of radiation can be stopped by paper?
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A: Alpha
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Q: Which type of radiation is most penetrating?
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A: Gamma
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Q: What is used to detect radiation?
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A: Geiger-Müller tube
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Q: What force keeps planets in orbit?
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A: Gravitational force
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Q: What is red-shift?
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A: The increase in wavelength of light from distant galaxies
showing they are moving away.
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Q: What is the Big Bang Theory?
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A: The idea that the universe began from a very small
hot
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Q: What is the life cycle end stage of a small star like the Sun?
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A: White dwarf
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Q: What evidence supports the Big Bang Theory?
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A: Red-shift and cosmic microwave background radiation
