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Chemistry > p2.1 forces > Flashcards

p2.1 forces Flashcards

1
Q

what is the speed of an object?

A

the distance it travels in a unit time

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2
Q

what is the equation for speed?

A

distance/time

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3
Q

what is the equation for distance?

A

speed x time

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4
Q

what is the equation for time?

A

distance/speed

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5
Q

calculate the speed of a ball thrown a distance of 12 metres in 3 seconds

A

4 m/s

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6
Q

calculate the distance travelled by a coach travelling at a speed of 31m/s for a time of 20 s

A

620 m

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7
Q

calculate the time it takes for a chicken to walk 4 metres if its speed is 0.5m/s

A

8 s

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8
Q

what is the unit for distance?

A

metres

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9
Q

what is the unit for speed?

A

m/s

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10
Q

what is the unit for time?

A

seconds

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11
Q

what is instantaneous speed?

A

the speed an object is travelling at that exact moment

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12
Q

what is average speed?

A

calculated using total distance and total time

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13
Q

when is average speed and instantaneous speed the same?

A

if an object is travelling at a constant speed

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14
Q

what are scalars?

A

the quantity measured with numbers only

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15
Q

what are vectors?

A

quantity’s measured wit direction

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16
Q

what are three things that are scalars?

A

temperature
time
speed

17
Q

what are three things that are vectors?

A

displacement
velocity
acceleration

18
Q

what is velocity?

A

the speed in a specific direction

19
Q

what is the equation for velocity?

A

displacement/time

20
Q

what is the equation for time?

A

displacement/velocity

21
Q

what is the equation for displacement?

A

time x velocity

22
Q

what is relative velocity ?

A

the difference in velocities between two objects

23
Q

what is the equation for average speed?

A

initial speed + final speed/2

24
Q

what is acceleration?

A

the change of velocity in a given time

25
Q

what is the equation for change in velocity?

A

acceleration x time

26
Q

what is the equation for acceleration?

A

change in velocity/time

27
Q

what is the equation for time?

A

change in velocity/acceleration

28
Q

what is an anomaly?

A

a result which significantly differs from the other results collected

Chemistry (6 decks)

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