OCR Gateway GCSE Combined Science A physics matter, forces and energy overview quiz quiz

Density equals volume divided by mass

Density equals mass divided by volume

Density equals mass multiplied by volume

Density equals mass plus volume

The individual gas particles swell up and get bigger when heated

The sealed rigid container slowly shrinks in size as the gas inside it warms up

The particles move faster, so they hit the walls more often and with more force

The total number of gas particles inside the container increases

The acceleration

The average speed

The resultant applied force

The distance travelled

Resultant force equals mass times acceleration

An object stays still unless a force acts

Every action has an equal and opposite reaction

Momentum is always conserved

Only the distance travelled while braking

The thinking distance plus the braking distance

Only the distance travelled during the reaction time

The distance from home to the destination

Kinetic energy equals mass times height times gravity

Kinetic energy equals the resultant force applied times the distance moved

Kinetic energy equals one half times mass times speed squared

Kinetic energy equals the object's mass times its speed

Energy can be freshly created whenever a system happens to need more of it

Energy is always completely destroyed by friction whenever surfaces rub together

Energy only ever exists inside objects that are actually moving at the time

Energy cannot be created or destroyed, only transferred between stores

The rate of energy transfer, in joules per second (watts)

The total amount of energy transferred altogether

The overall size of the resultant force that is applied to an object

The total distance that a given object moves through

50%

20%

5%

80%

To make the transmission cables glow so faults are easy to spot

Because a very high voltage is far safer to touch than a low one

So the current is lower, which reduces the energy wasted as heat in the cables

To increase the resistance of the cables so that much less current can flow at all