# Physics AS1 Definitions

HideShow resource information
Projectile
“A projectile is any object moving with a constant acceleration in one direction and a constant in the other “
1 of 20
Newton’s first law
"A body will remain at rest, or move with a constant velocity unless acted upon by an unbalanced force"
2 of 20
Newton’s second law
"The acceleration of an object is directly proportional to the resultant force in the same direction and inversely proportional to its mass"
3 of 20
Newton’s third law
"If body A, exerts a force on body B, then Body B exerts an equal force but in the opposite direction on Body A"
4 of 20
Moments of a force
"The product of the force and the perpendicular distance from the point and the point (pivot) to the line of action of the force"
5 of 20
Principle of moments
"When an object is in a rotational equilibrium, the sum of the clockwise moment is equal to the sum of the anticlockwise moment about any point"
6 of 20
Work
"Energy- stored ability to do work Work done- (by a constant force) is the product of the force and the distance travelled in the direction of the force "
7 of 20
Potential energy
“The amount of energy an object possesses due to its height above the ground“
8 of 20
Kinetic energy
“The energy possessed by an object due to its motion”
9 of 20
Conservation of energy
“Energy cannot be created or destroyed it can only be changed form to another”
10 of 20
Power
“The rate of doing work”
11 of 20
Efficiency
“How good a device is at converting energy from one form to another in an intended way”
12 of 20
Hooke’s law
“Up to a maximum load, known as the limit of proportionality, the extension of an elastic material is proportional to the applied force”
13 of 20
Charge
“A current f 1amp is flowing in a circuit is equal to the charge of 1 coulomb passing a fixed point in the circuit every second “
14 of 20
Electromotive force
“The energy converted into electrical energy when a unit of charge passes through it”
15 of 20
Potential difference
“Energy generated for every coulomb of charge passing between them”
16 of 20
Electrical power
“The rate at which energy is converted into other forms of energy by a circuit or a component in a circuit”
17 of 20
Ohms law
“Current is direly proportional to applied Potential difference at a constant temperature”
18 of 20
Resistivity
“The resistance of a sample of the material of length 1m and of CSA 1m”
19 of 20
Super conductors
“A material that loses all electrical resistivity to become a perfect conductor when it falls below the critical (Curie) temperature”
20 of 20

## Other cards in this set

### Card 2

#### Front

"A body will remain at rest, or move with a constant velocity unless acted upon by an unbalanced force"

#### Back

Newton’s first law

### Card 3

#### Front

"The acceleration of an object is directly proportional to the resultant force in the same direction and inversely proportional to its mass"

### Card 4

#### Front

"If body A, exerts a force on body B, then Body B exerts an equal force but in the opposite direction on Body A"

### Card 5

#### Front

"The product of the force and the perpendicular distance from the point and the point (pivot) to the line of action of the force"