5B.1 Circular Motion Basics Flashcards

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1
Q

what is a radian

A

a unit of angle measurements

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2
Q

one radian equals to

A

57.3 degrees

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3
Q

what is the angular displacement

A

it is the vector measurement of the angle through which something has moved

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4
Q

what is the equation for the angular displacement of a circular motion

A

angle = s(distance moved (arc lenght0)/r (raduis)

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5
Q

in circular motion anticlockwise rotation

A

is a positive number

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6
Q

in circular motion clockwise rotation

A

is a negative number

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7
Q

what is the angular velocity

A

the rate at which the angular displacement changes units rad per s

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8
Q

what is the equation of angular velocity

A

w = angle/T

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9
Q

what is the instantaneous velocity

A

the velocity of an object in a circular motion

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10
Q

what is the equation of the instantaneous velocity

A

v = rw (find diveration in page 17)

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11
Q

what is centripetal accelaration

A

it is the acceleration towards the center of the circle that corresponds to the constant change in direction to maintain the object’s orbit around the circle

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12
Q

what is the equation for centripetal accelaration

A

v^2/r

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13
Q

centripetal accelaration is caused by the change of direction in

A

the horisantal component only since centripetal accelaration is always directed towards the centre of the circle

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14
Q

what is the derivation of centripetal accelaration

A

page 18

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