EOY Exam Essential Vocab Revision - Physics

The total length travelled

The direct distance from start to end “as-the-crow-flies”, direction required

Distance/time, units required

Displacement/Time, units and direction required

The exact speed given at any specific moment in time

Change in velocity/time taken. Suffix of units/timesquared. Describes the change in speed of an object. Can be negative or positive.

Also known as negative acceleration, slows down an object and value can only be positive.

Rise/run

• Frictional Force • Magnetic Force • Electrostatic Force • Air resistance • Weight Force (created by gravitational pull) • Buoyancy • Thrust • Push • Pull Unit for forces in N (Newtons)

Forces that resist or go against the motion of an object

Law of Inertia: An object at rest or constant speed in the same direction remains at rest or constant speed and constant velocity unless acted upon by an unbalance outwards force.

An object’s tendency to resist change

F = m x a (F = force, m = mass, a = acceleration). The acceleration of an object depends on the mass of the object and the force applied.

For every action there is an equal and opposite reaction Forces occur in pairs

• Sound • Light • Kinetic • Potential • Chemical • Electrical • Heat • Elastic potential • Gravitational potential • Nuclear

Energy cannot be created or destroyed but can be transferred or transformed

Measure of how much energy ends up in the form you want (Formula: % = (useful energy/total energy) * 100)

Transfer in energy that occurs when a froce moves an object in the direction of force. Work = Force x Distance Measured in Joules, Distance measured in metres

When forces result due to two or more objects making contact with each other

Forces that are resulted even when two objects are not in contact with each other

When a force applied in a direction is greater than the opposing force

When the two opposing forces are equal

Overall/Total force acting upon an object

Standard International Units * Length - meter (m) * Time - second (s) * Mass - kilogram (kg) * Acceleration (m/s/s)