physics unit 2

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what is the unit of distance?
metres, M
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what is the speed of a runner who covers 400m in 50s?
8 metres per second or m/s
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what is the difference between speed and velocity?
velocity is speed in a particular direction
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what is the unit for acceleration?
metre per second squared
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what does a horizontal line on a velocity-time graph represent?
constant velocity, no acceleration
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what would the velocity-time graph for a steadily decelerating object look like?
a straight line with a negative velocity
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what does an upwardly curving line represent on a: (a) distance-time graph and (b) velocity-time graph?
(a) increasing velocity (b) increasing acceleration
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what is the unit of force?
newtons, N
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in what direction does the force of weight act?
downwards
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what is the unit of resultant force?
newtons, N
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what is the resultant force of a 4N force and a 3N force acting in the same direction?
7N in the same direction
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what happens to the acceleration of an object as the resultant force on it decreases?
acceleration decreases
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Other cards in this set

Card 2

Front

what is the speed of a runner who covers 400m in 50s?

Back

8 metres per second or m/s

Card 3

Front

what is the difference between speed and velocity?

Card 4

Front

what is the unit for acceleration?

Card 5

Front

what does a horizontal line on a velocity-time graph represent?