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10 Cards in this Set
- Front
- Back
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uniform motion |
moving at a steady speed without changing direction, no force or energy needed |
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accelerated motion |
either a changing speed or a changing direction of speed, force is needed |
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vector |
a quantity of both size and direction e.g. velocity the size of a vector is called magnitude can be broken into its two components, the horizontal (x) and vertical (y) |
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scalar |
a quantity with just size and no direction e.g. speed |
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velocity of (a) relative to (b) |
Vãb |
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Vab + Vbc = ? |
Vac |
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Projectile Motion |
- vertical motion of two objects with equal size is same. both are affected by gravity, accelerated motion for this movement, use four equations of motion - horizontal motion is not affected by gravity, uniform motion. for this motion, use speed = distance / time |
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Circular Motion |
the velocity of motion is always changing, as direction is always changing. speed stays the same
is tangent to the point on the circle, showing the direction of the velocity, is at right angle with centripetal acceleration |
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Centripetal acceleration |
this acceleration is directed towards the center of the circle, at right angle with circular velocity
ac = V2 / r |
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Torque |
a turning force. T = Fd where F and d are perpendicular is either clockwise or anticlockwise |
