Flashcards in Study notes physci 105 less death Deck (38):

1

## Acceleration

### Change in velocity(accel, decel, direction)

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## speed

### measure of how fast something is moving

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## instantaneous speed

### speed at a specified instant

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## velocity

### both speed and direction

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## force

### push or pull

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## net force

### sum of all forces

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## weight

### downward pull on an object resulting from gravity

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## average speed

### distance during a period of time

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## Formula for acceleration

### V(bar)=(Vf-Vi)/t

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## four fundamental forces

### Gravity, Electromagnetic forces, Weak nuclear strong nuclear

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## accel of Gravity (g)

### 32 ft/s^2 or (9.8 m/s^2)

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## newtons 1st law of motion

### (inertia) an object in motion tends to stay in motion inversely an object at rest tends to stay at rest

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## newtons 2nd law of motion

### the acceleration of an object is directly proportional to the net force acting on it and inversly proportional to the mass of the object

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## newton defined in terms of what unit

### mass: measured in kg, and acceleration: measured in m/s^2

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## mass is directly proportional to what?

### inertia

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## formula for force

### F=ma

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## what are the units of force (weight)

### lb and newton

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## what are units of mass

### kg

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## newtons 3rd law of motion

### whenever 2 objects interact the force exerted on one object is equal in size and oposite in directiokn to the force exerted on the other object

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## formula for momentum

### p=mv (momentum=mass*velocity)

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## universal law of gravitation

### every object in the universe in attracted to every other object with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distances between them (F=G*((m1*m2)/d^2)))

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## momentum

### product of an objects mass and velocity

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## law of conservation of momentum

### momentum always remains the same

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## impulse

### change of momentum equal to a force times the time of application (delta)p= ft

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## centripetal force

### force that pulls an object out of its stright line path

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## formula for period

### T= 1/f

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## formula for speed

### v(bar)= d/t

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## formula for average velosity

### a=(Vf-Vi)/t

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## formula for velocity

### (lambda)f -----wavelength* frequency

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## amplitude

### max value of dispacement of a vibration

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## frequency

### max number of vibrations in a second

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## hertz

### the unit of frequency

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## waves

### traveling vibrations or disturbances in a medium

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## transverse waves

### particles move perpendicular to movement of wave

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## longitudinal wave

### particles move parellel to movement of wave

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## sound (what kind of wave?)

### longitudinal wave

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## disturbances of a wave are called?

### condensations (crests) and rarefactions (troughs)

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