2.3 Nature of Quantities Flashcards

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1
Q

what is a scalar quantity?

A

a quantity which has only magnitude, not direction

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2
Q

what is a vector quantity?

A

a quantity which has both magnitude and direction

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3
Q

what are some examples of scalar quantities?

A

mass, time, temp, length, speed, energy, volume, power

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4
Q

what are some examples of vector quantities?

A

force, displacement, velocity, acceleration, momentum, pressure, impulse

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5
Q

what does it mean to resolve a vector?

A

the splitting of a vector into its horizontal and vertical components (Vx = Vcos θ and Vy = Vcosθ)

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6
Q

how do you calculate the resultant vector of two vectors in the same plane (coplanar)?

A

use a vector triangle and always draw ‘tip to tail’

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7
Q

what should you do to calculate the resultant vector when they vectors are not at right angles?

A

you should draw a scaled diagram and manually measure it

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8
Q

what should you do to calculate the resultant vector when they vectors are at right angles?

A

use pythagoras and trigonometry

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