8Physics revision- End of Year 8 Test

• Pressure= Force/ Area
• Density= Mass/Volume
• The density of an object is the mass per unit volume.
• Speed= Distance/ Time
• Voltage= Current x Resistance
• The pressure at the bottom of a liquid is higher than the pressure at the top
• One volt of pressure is required to push one amp of current through one ohm of resistance
• The gradient of the line on a distance-time graph is the speed
• A straight upwards line means the object is going at a constant speed
• A curved upwards line means the object is accelerating
• A straight downwards line means the object is travelling backwards at a constant speed
• A curved downwards line means the object decelerating
• Speed is the amount of distance travelled per unit of time
• Pressure is the amount of force exerted on a surface per unit of area.
• In a parallel circuit, the voltage is the same across each component- it is the same as the supply voltage.
• In a parallel circuit, the current in each branch needs to be added up to find the total current
• In a series circuit, the current is the same everywhere.
• In a series circuit, the voltage is the same across all components, it is divided equally between them