EOY Exam Essential Vocab Revision - Physics

Question 1

Distance

Answer 1

The total length travelled

Question 2

Displacement

Answer 2

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

Question 3

Speed

Answer 3

Distance/time, units required

Question 4

Velocity

Answer 4

Displacement/Time, units and direction required

Question 5

Instantaneous Speed

Answer 5

The exact speed given at any specific moment in time

Question 6

Acceleration

Answer 6

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

Question 7

Decceleration

Answer 7

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

Question 8

Gradient

Answer 8

Rise/run

Question 9

Different types of forces

Answer 9

• Frictional Force
• Magnetic Force
• Electrostatic Force
• Air resistance
• Weight Force (created by gravitational pull)
• Buoyancy
• Thrust
• Push
• Pull

Unit for forces in N (Newtons)

Question 10

Resistance Forces

Answer 10

Forces that resist or go against the motion of an object

Question 11

Newton’s First Law of Motion

Answer 11

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.

Question 12

Inertia

Answer 12

An object’s tendency to resist change

Question 13

Newton’s Second Law of Motion

Answer 13

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.

Question 14

Newton’s Third Law of Motion

Answer 14

For every action there is an equal and opposite reaction

Forces occur in pairs

Question 15

Forms of Energy

Answer 15

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

Question 16

Law of Conservation of Energy

Answer 16

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

Question 17

Energy Efficiency

Answer 17

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

Question 18

Work

Answer 18

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

Question 19

Contact Force

Answer 19

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

Question 20

Non-contact Force

Answer 20

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

Question 21

Unbalanced Force

Answer 21

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

Question 22

Balanced Force

Answer 22

When the two opposing forces are equal

Question 23

Net Force

Answer 23

Overall/Total force acting upon an object

Question 24

SI Units

Answer 24

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

Question 25

Magnitude

Answer 25

The size of a force

Question 26

Earth’s acceleration

Caused by gravity

Answer 26

9.8m/ssquared

Question 27

Momentum

Answer 27

A measure of an object’s movement