Paper 1 Physics Key Terms

What is when a 1kg mass has an acceleration of 1ms-2

What type of quantity that has both size and direction?

Newton's 1st Law: An object will remain [blank_start]at rest[blank_end] or at a [blank_start]constant velocity[blank_end] in a straight line until an external force acts on it, so the resultant force is [blank_start]zero[blank_end].

Momentum = [blank_start]mass x velocity[blank_end]

Newton's 2nd Law: Rate of [blank_start]change of momentum[blank_end] is proportional to [blank_start]force[blank_end]

Newton's 3rd Law: If object A exerts a force on object B, then object B exerts an [blank_start]equal[blank_end] and [blank_start]opposite[blank_end] force on object A.

Acceleration: [blank_start]the rate of change of velocity[blank_end]

Speed is the rate of change of displacement

Velocity is the rate of change of displacement

KE: Energy due to [blank_start]movement[blank_end] which depends on [blank_start]mass[blank_end] and speed. The equation is [blank_start]1/2mv^2[blank_end]

GPE: energy due to [blank_start]height[blank_end] above ground, depends on [blank_start]gravitational field strength[blank_end] (G.F.S). The equation is [blank_start]mgh[blank_end].

Energy needed to move a force of 1N a distance of 1m in the direction of the force. This describes the [blank_start]Joule[blank_end]

Which of these describes Power?

Watt: a [blank_start]joule per second[blank_end]

Work Done: [blank_start]force x distance[blank_end]

Centre of Gravity: The [blank_start]point[blank_end] where all of the [blank_start]weight[blank_end] of an objects [blank_start]appears to act[blank_end]

What is true for the Principle of Conservation of Energy?

Moment: [blank_start]Force[blank_end] [blank_start]x[blank_end] [blank_start]perpendicular distance from the pivot[blank_end]

Current: [blank_start]flow[blank_end] of [blank_start]charged[blank_end] particles

The coulomb: The [blank_start]charge[blank_end] (flowing past a point) in [blank_start]1s[blank_end] when the [blank_start]current[blank_end] is [blank_start]1A[blank_end]

Conventional Current is the flow of [blank_start]positive charge[blank_end] from [blank_start]positive to negative[blank_end]

Charge= [blank_start]current x time[blank_end]

Voltage is [blank_start]work done per unit charge[blank_end]

Ohm's Law: [blank_start]Current[blank_end] is [blank_start]directly proportional[blank_end] to [blank_start]potential difference[blank_end] provided that all [blank_start]physical conditions[blank_end] remain [blank_start]constant.[blank_end]

EMF is [blank_start]energy transformed per unit charge[blank_end] from [blank_start]another[blank_end] energy to [blank_start]electrical[blank_end] energy.

Kirchhoff's 1st Law: The sum of the [blank_start]currents entering a junction[blank_end] is [blank_start]equal[blank_end] to the sum of the [blank_start]currents leaving the junction.[blank_end]

Kirchhoff's 2nd Law: The sum of the e.m.f.s is the sum of [blank_start]voltages[blank_end] in a [blank_start]closed loop[blank_end]

Resistance is [blank_start]voltage per unit current.[blank_end]

An ohm is the [blank_start]potential difference[blank_end] of [blank_start]one volt per ampere.[blank_end]

Resistivity = [blank_start]RA/l[blank_end]. Resistivity is the [blank_start]resistance of a 1m length[blank_end] with a [blank_start]1m^2 cross sectional area[blank_end]. Resistivity is measured in [blank_start]ohm metres[blank_end].