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Movement terms

IGCSE Edexcel (9-1) Physics

QuestionAnswer
What is speed? Speed is the quantity that tells us how fast an object is moving
What is the equation for Average speed? Average Speed = Total Distance travelled /Total time taken v=s/t
What are the units to measure distance in physics? Metres
What are the units to measure time in physics? seconds
What is the equation to calculate time taken? Time= distance/speed
What is the equaton to calculate distance moved? Distance = Speed x Time
How to covert m/s into km/h Multiply m/s by 3.6
What is Instantaneous Speed? Instantaneous speed is the speed of a object at a particular time.
What is Uniform speed? Uniform Speed is when an object travels same distance in same time intervals
In a distance Time graph , How to find the speed? By calculating the gradient
Is distance a scalar or Vector quantity? Scalar Quantity
Is speed a scalar or vector quantity Scalar Quantity
Is displacement Scalar or Vector? Vector
What is Displacement? Displacement is distance travelled with direction
What does vector quantity have? Magnitude and Direction
Give the equation for Average Velocity? Average Velocity = Increase in Displacement/Time Taken
In displacement Time graphs if the line is going from left to right then what can you say about the object moving? The object is moving backwards
What is Acceleration? Acceleration is the rate of change in velocity
What is the equation to calculate acceleration? Acceleration = (Final velocity-Initial velocity)/time
Give the symbolic equation for Acceleration? a = (v-u)/t
How to find Final velocity/Increase in Velocity? Final velocity = Initial Velocity + Acceleration x time v=u+at
Let's Say You needed to find the final velocity but without using time. What equation will you use? Final velocity squared = Initial Velocity Squared + Acceleration x Distance
In displacement time - Graphs how to calculate the velocity By calculating the gradient
In Velocity time graphs what does the gradient of the slope tell you? The acceleration
In Velocity time graphs how to find the displacement By calculating the area under the line/slope
Is Force a Scalar quantity or a Vector quantity Vector
Who discovered the hookes law? Robert Hookes
What does the hookes law state? That the extension is directly proportional to the force applied..
What happens when the force applied is increased? The extension will not be proportional to the force applied and the graph becomes a little bit curved
What is the x axis .. Force applied or Extension Extension
Will a object accelereate if there is a balanced force?? No
What is force proportional to ? Acceleration...
Acceleration is Inversly proportional to mass
What is Drag coefficient? Drag coefficiant is the measure of how easily an object moves through air
What is air resistance? Air resistance is the force experienced by objects that move through air which opposes motion
When a object is at rest air resistance is ----Give a value---- 0
When a object is moving what happens? Explain in terms mentioning Air resistance Air resistance acts on it and it increases and the speed of the object increases
Why when a object is at rest there is no air resistance Because air drag or air resistance only acts on moving objects
Explain what happens when a skydiver jumps out of a plane? He will accelerate for a while and eventually reach terminal velocity
Explain what happens when a skydiver opens his parachute? This will cause a sudden increase in drag force. At this velocity the drag force of the parachute is greater than the weight of the parachute and for a while, he will decelerate
What happens as the parachutist slows down? The drag force decreases and a new terminal velocity will be reached
What is momentum? Momentum is a measurement on how hard it is to stop a moving object
Name 3 ways things that are in cars to minimize accidents? Crumple zones Seat belts Air bags
What does Newtons 1st law of motion state? Things don't speed up, slow down or change direction uless you push or pull them
What does newtons 2nd law of motion state? The bigger the force acting on a object the faster it will speed up
What does newtons 3rd law of motion state? Every Action has a equal and opposite reaction
Created by: kawi_is_studying
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