Record breaks target sheet Flashcards
- What does the word speed means?
The word speed is how fast or slow an object moves and is how much time is takes to travel a certain distance
- How do you calculate speed?
D:T= speed
- How do you rearrange the speed formula to calculate distance and time?
Distance= SxT Time= D:S
- Take measurements of time and distance and use them to calculate average speed
To calculate the average speed in a time graph we have to take a gradient and see how much time has take to make that distance and divide them up, is the same than with the speed
- Converting different type of units
3600s =60min =1 hour
1000m = 1km 1000mm = 100cm = 1m
- How does a light gate works?
The light gate it has got a light which joins the two edges of the machine, the cars passes between the light, interrupting it, so the machine counts how many seconds is interrupted, as well it measures the top of the car, which is what interrupts the light, so we get the distance and time
- Which is the difference between instantaneous and average speed?
That average speed is with a long period of time, while the instantaneous it measures the speed of an object in short period of time
- Interpret and describe the different parts of a distance time graph
x = time. y = distance Acceleration= curve upwards Deceleration= curve downwards Constant speed =straight line going upwards Stationary= straight horizontal line
- Know the terms constant speed, acceleration and deceleration
Constant speed: going all the time to the same speed, is a balanced force
Acceleration: it passes from being a balanced force to unbalanced because it starts going faster
Deceleration: it starts to go slower than before because of an unbalanced force
- What reaction time is? How affects accuracy and reliability?
Is how much time a human takes to respond to an event
This means that the reaction time of a human is added to an experiment, which makes it less accurate and reliable
- What does balanced and unbalanced forces mean
A balanced force is the one which moves to constant speed or is stationary, which means that the same force is acting in every direction
An unbalanced force is the one that acts towards the direction of the resultant force, two forces of different sizes acting on opposite directions making it accelerate or decelerate
- What does weight, drag,thrust and lift mean?
Weight is the gravity of a planet times the mass, is the force that pulls downwards
Drag: is the friction produced in water, like boat
Thrust: is the force moving forwards, like the fuel
Lift: is when an aero foil ( wing of a plane ) is moving forwards
- What is a resultant force? How is calculated?
A resultant force is the overall force acting on an object.
To subtract two opposite forces, what is left is the resultant force
- Know that a force must be quoted with a number, unit and direction
E.g = 10
Newton
Arrow
- Which are the effects of balanced forces on moving objects?
They stay stationary or move at a steady speed
