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28 Cards in this Set
- Front
- Back
Acceleration due to gravity
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The acceleration produced in a body due to the earth's attraction is called acceleration due to gravity. It is denoted by the letter g. Its SI unit is m/s². On the surface of the earth, its average value is 9.8m/s².
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Acceleration
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The rate of change of velocity of a moving object
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Amp[Ampere]
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Unit of electric current. It is equivalent to coulomb/sec.
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Amplitude [of waves]
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The maximum displacement of particles of the medium from their mean positions during the propagation of a wave
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Angle of incidence
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Angle of an incident (arriving) ray or particle to a surface; measured from a line perpendicular to the surface (the normal)
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Angle of reflection
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Angle of a reflected ray or particle from a surface; measured from a line perpendicular to the surface (the normal)
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Avogadro's Number
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6.02 x 10^23
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Centripetal force
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The force required to pull an object out of its natural straight-line path and into a circular path
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Coulomb
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Unit used to measure quantity of electric charge
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Diffraction
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The bending of light around the edge of an opaque object
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Doppler effect
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An apparent shift in the frequency of sound or light due to relative motion between the source of the sound or light and the observer
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First law of motion
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Every object remains at rest or in a state of uniform straight-line motion unless acted on by an unbalanced force
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Frequency (of waves)
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The number of waves produced per second is called its frequency.[Hz]
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Index of refraction
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The ratio of the speed of light in a vacuum to the speed of light in a material
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Inertia
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The property of matter that causes it to resist any change in its state of rest or of uniform motion.
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Joule
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Metric unit used to measure work and energy; can also be used to measure heat; equivalent to newton-meter
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Net force
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The resulting force after all vector forces have been added; if a net force is zero, all the forces have canceled each other and there is not an unbalanced force
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Newton
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A unit of force defined as kg.m/sec^2
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Newton's second law of motion
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The rate of change of momentum is equal to the force applied OR the force acting on a body is directly proportional to the product of its mass and acceleration produced by the force in the body.
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Newton's third law of motion
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To every action there is an equal and opposite reaction
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Ohm
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Unit of resistance; equivalent to volts/amps
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Power
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The rate of doing work is called power. Power is a scalar quantity. The SI unit of power is Watt ( 1 W = 1 J/sec)
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Refraction
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A change in the direction of travel of light, sound, or other waves crossing a boundary
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Scalar Quantity
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is described completely by its magnitude
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Volt
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Unit of potential difference equivalent to joules/coulomb
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Watt
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Metric unit for power; equivalent to joule/sec
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Work
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Force x Displacement in the direction of the force
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Work
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Work is done when a force acting on a body displaces it. Work is a scalar quantity. The SI unit for work is Joule
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