S1 Physics

Speed

• the number of complete wavelengths that pass a point in a second
• Height of a wave from the middle (up or down)
• The distance an object travels in a given time.
• kg/m^3 or g/cm^3

Units of distance

• A measure of how hot or cold something is.
• metres (m)
• A slope upwards
• The energy transferred from hot objects to colder ones

Units of time

• seconds (s)
• A measure of energy given to charges in a circuit.
• The distance between a sound a something that hears the sound, the time it takes between the sound being made and heard.
• metres cubed (m^3) or centimetre cubed (cm^3)

Units of speed

• meters per second (m/s)
• The distance between a sound a something that hears the sound, the time it takes between the sound being made and heard.
• Amps (A)
• A metal spoon left in a pot while cooking

The equation that links speed, distance and time

• speed = distance/time (v=d/t)
• A measure of the amount. of mass in a given volume.
• Volts (v)
• An electric circuit with a single path

To measure average speed we need to measure:

• A measure of how hot or cold something is.
• The total distance travelled and the time it took to complete the journey.
• 20 Hz to 20,000 Hz
• conduction

The equipment to measure average speed:

• Lowest point of a wave
• their density is less than the fluid they are in
• A metre stick / trundle wheel, stop-clock (calculator)
• a vibration that transfers energy

Should we repeat our measurements in an experiment

• Airplanes taking off, building work, people shouting, loud music
• A metal spoon left in a pot while cooking
• Yes! then take a mean average
• A line going up and down repeatedly

Draw a speed time graph of an object that is increasing its speed (accelerating)

• seconds (s)
• A property of any object (can be positive, neutral or negative)
• A slope upwards
• their density is more than the fluid they are in

• Draw a speed time graph of an object that travelling at a constant speed (not at rest)

• A movement of electrical charges around a circuit
• A measure of how hot or cold something is.
• a decibel meter
• A horizontal line above the x axis