18115460
Description
Flashcards by Malachy Moran-Tun, updated more than 1 year ago
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Created by Malachy Moran-Tun
almost 5 years ago
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| Question | Answer |
| What is a Scalar Quantity? | A quantity with a magnitude but no direction |
| What is a Vector Quantity? | A quantity with both a magnitude and a direction |
| What are some examples of Scalar Quantities? | > Distance > Speed > Mass > Time (i mean technically if we ever invent time travel, it'll be a vector) > Energy |
| What are some examples of Vector Quantities? | > Displacement > Velocity > Acceleration > Force > Weight > Momentum |
| What is Velocity? | Speed with a Direction |
| What Equation Relates Speed, Distance and Time? | Distance = Speed * Time or Speed = Distance ÷ Time or Time = Distance ÷ Speed |
| Explain the Three First Points on this Graph | > Constant Velocity > Stationery > Greater Constant Velocity |
| Explain the Relation Between Gradient and Velocity on a Distance-Time Graph | The Greater the Gradient, the Greater the Velocity |
| Explain the Four Points on this Graph | > Constant Acceleration > Constant Velocity > Greater Constant Acceleration > Constant Deceleration |
| Explain the Relation Between Gradient and Velocity on a Velocity-Time Graph | The Greater the Gradient, the Greater the Acceleration |
| What Equation Relates Acceleration, Δ Velocity, and Time? | v - u = at or a = (v - u) ÷ t or t = (v - u) ÷ a |
| What Equation Relates the Final Velocity Squared, the Initial Velocity Squared, Acceleration and Distance? | v² - u² = 2ax or x = (v² - u²) ÷ 2a or a = (v² - u²) ÷ 2x |
| What Laboratory Method could be Used to Determine the Speed of an Object? | Light Gates |
| What is the Acceleration in Free Fall (g) | 10m/s² |
| What is the (approximate) Gravitational Field Strength on Earth (g)? | 10N |
| What is the Equation for Neuton's Second Law? | F = ma or m = F ÷ a or a = F ÷ m |
| What is the Equation that Relates Weight, Mass and Gravitational Field Strength? | W = mg or m = W ÷ g or g = W ÷ m |
| What is Terminal Velocity? | > When an Object Falls, there are Two Vertical Forces (Weight and Air Resistance) > As the Object Falls, it Accelerates > As the Object's Velocity Increases, the Air Resistance also Increases > Eventually the Object's Weight and the Air Resistance Balance Eachother Out, Remaining at a Constant Velocity (Terminal Velocity) |
| What is Stopping Distance? | The Sum of Thinking Distance and Braking Distance Stop. Dis. = Think. Dis. + Brake. Dis. |
| What are some Factors that Impact Braking Distance? | > The Mass of the Vehicle > The Speed of the Vehicle > The Road Condition > The Brakes' Conditions > The Tires' Conditions > The Friction Between the Road and Tires |
| What are some Factors that Impact Thinking Distance? | > Tiredness > Drugs (Specifically Alchohol) > Distractions, such as Loud Music > The Speed of the Vehicle |
| What Equation Links Kinetic Energy and Work Done? | Fd = 0.5mv² |
| What Happens to the Braking Distance when the Velocity is Doubled and Why? | > It Quadruples > Fd = 0.5mv² > Since it's squared, Doubling equals 2² = 4 > So you multiply by 4 > d ∝ v² |
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