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Psychics revision > Motion > Flashcards

Motion Flashcards

1
Q

What is scalar

A

Scalar is a quantity which has size

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2
Q

What is vector?

A

Vector is a quantity which has size and direction

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3
Q

What is distance

A

How far apart two points are

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4
Q

What is displacement

A

The distance in a particular direction

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5
Q

What is speed

A

Rate of change of distance

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6
Q

What is velocity

A

Rate of change of displacement

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7
Q

What is acceleration

A

Rate of change of velocity

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8
Q

What can happen to an object when it accelerates

A

Speed up, slow down or change direction

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9
Q

Formulas for average speed

A

Total distance over time

I.S+F.S over 2

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10
Q

Formula for rate of change of speed (RCS)

A

F.S-I.S over time

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11
Q

Formulas for average velocity

A

Displacement over time

I.V+F.V divided by 2

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12
Q

Formula for acceleration

A

F.V-I.V divided by time

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13
Q

Formula for distance/speed/time.

A

Distance=SpeedxTime

Time= Distance over speed

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14
Q

What is density

A

The density of an object is its mass per unit volume.

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15
Q

What is the experiment to investigate the relationship between mass and volume for density?

A

Apparatus:
At least 3 blocks of same material, different sizes
Ruler
Electronic balance

Method:
Measure the mass of block using electronic balance
Measure length, breadth and height using ruler
Record results
Draw graph of mass (y) against volume (x)

Diagram:
Rectangle

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16
Q

Equation for volume

A

Volume=length x breadth x height

17
Q

Formula for density

A

Density=Mass divided by volume

18
Q

Formula for resultant force

A

Fres=mxa

19
Q

List the units for density mass and volume

A

Density: cubed kg/g g/cm
mass: kg or g
volume: cubed m/cm

20
Q

Experiment to find the density of a liquid

A

Apparatus: Measuring cylinder
Electronic balance

Method:
Measure mass of empty cylinder using electronic balance
Add liquid to cylinder and record new mass
Find mass of liquid by subtracting the mass of empty cylinder
Measure volume using cylinder
Calculate density

21
Q

Experiment to find the density of an irregular object

A

Apparatus: Electronic balance
Measuring cylinder

Method:
Measure mass of object using electronic balance
Add water to cylinder
Measure volume of water in cylinder
Submerge object in liquid (avoid splashes)
Measure new volume of water+object
Calculate volume of object
Calculate density
Repeat to increase reliability

Psychics revision (8 decks)

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