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Physics > Kinematics > Flashcards

Kinematics Flashcards

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1
Q

what is the si unit for distance?

A

metres (m)

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2
Q

is distance a scalar or vector quantity?

A

scalar quantity

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3
Q

what is distance?

A

it is total length covered in an journey irrespective of direction of the motion

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4
Q

what is displacement?

A

the distance in a straight line from the starting point to the ending point in a specific direction

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5
Q

is displacement a scalar or vector quantity?

A

vector quantity

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6
Q

what is speed?

A

it is the distance travelled per unit time

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7
Q

is speed a scalar or vector quantity?

A

scalar quantity

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8
Q

what is the formula for speed?

A

speed=distance/time

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9
Q

what is velocity?

A

it is the rate of change of displacement

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10
Q

is velocity a scalar or vector quantity?

A

vector quantity

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11
Q

what is the formula for velocity?

A

velocity=displacement/time

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12
Q

what is a negative velocity?

A

it means that the object is moving in the opposite direction

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13
Q

what is average speed?

A

the total distance travelled by the object divided by the total time taken during the journey of an object

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14
Q

what is acceleration?

A

it is defined as the rate of change in velocity

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15
Q

what is average acceleration?

A

it is defined as the change of velocity per unit time

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16
Q

what is the unit for acceleration?

A

ms -2 or m/s2

17
Q

what is the formula for acceleration?

A

a= v-u / t

18
Q

what happens when an object moves at a constant speed without changing its direction?

A

it has zero acceleration

19
Q

what is used to describe an object slowing down?

A

retardation or deceleration

20
Q

if a car is moving at constant speed along a circular track, is the car accelerating?

A

yes, car is moving at constant speed but direction is changing so velocity is not constant so have acceleration

21
Q

how to find the distance travelled by an object through a speed time graph?

A

the area under the graph

Physics (3 decks)

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