Higher Physics

• The speed of light in a vacuum is constant in all inertial frames of reference according to the Special Theory of Relativity.
• What is meant by the term average speed? Total distance divided by total time
• What is meant by the term instantaneous speed? The speed at a specific point
• What is the unit for average speed? metres per second, ms-1
• What is the unit for distance? metres, m
• What is the unit for time? seconds, s
• What is the unit for instantaneous speed? metres per second, ms-1
• What is a scalar? A quantity with magnitude (size) only
• What is a vector? A quantity with both magnitude (size) and direction
• What are examples of scalar quantities? SpeedDistanceMassTimeEnergy
• What are examples of vector quantities? ForceVelocityDisplacementAcceleration
• What is meant by the term acceleration? The change in velocity in a given time
• What is the unit for acceleration? metres per second squared, ms-2
• What is the unit for final velocity? metres per second, ms-1
• What is the unit for initial velocity? metres per second, ms-1
• "A velocity time graph is a good [...] of an objects motion" "A velocity time graph is a good visual representation of an objects motion
• "A velocity time graph is a good visual representation of an objects [...]" "A velocity time graph is a good visual representation of an objects motion
• "What will the area under a speed time graph give us?" "The total distance"
• "What will the area under a velocity time graph give us?" "The total displacement"
• "The area under a speed time graph will give us the total [...]" "The area under a speed time graph will give us the total distance
• "The area under a [...] time graph will give us the total distance" "The area under a speed time graph will give us the total distance
• "The area under a velocity time graph will give us the total [...]" "The area under a velocity time graph will give us the total displacement
• "The area under a [...] time graph will give us the total displacement" "The area under a velocity time graph will give us the total displacement
• How do we find the total distance on a velocity time graph? "Add all the areas together, ignoring the negatives"
• "How do we find the total displacement on a velocity time graph?" "Add all the areas together, including the negatives"
• What is Newtons 1st law of motion? An object will remain at rest or continue at a constant velocity unless acted on by an unbalanced force.
• What is Newtons 2nd law of motion? If an unbalanced force F (in Newtons) is applied to a mass m (in kilograms) it will accelerate at an acceleration of a metres per second.F=ma
• What is Newtons 3rd law of motion? For every action force there is an equal and opposite reaction force.
• Whe do we reach terminal velocity? When the frictional forces are equal at the force driving us down/forward
• Why does a skydiver decelerate when they open their parachute? Because the parachute causes drag which creates an unbalanced force upwards
• What is work energy? “Work” is the energy required to move an object a distance d, with an applied force F.Ew = Fd
• What is the unit for work energy? Joules, J
• What is the unit for force? Newtons, N
• What is gravitational potential energy? If an object of a mass m is moved up a height h, then the gravitational potential energy gained is:Ep=mgh
• What is the unit for gravitational potential energy? Joules, J
• What is the unit for mass? kilograms, kg
• What is the unit for gravitational field strength? Newtons per kilogram, Nkg-1 or meters per second squared, ms-2
• What is the unit for height? metres, m
• What is kinetic energy? An object of a mass m, moving with a velocity v, will have a kinetic energy given by:Ek=1/2mv2
• What is the unit for kinetic energy? Joules, J