Motion Flashcards
What is the the formula for average speed? And what’s is speeds units?
Distance travelled divided by total time taken measured in meters per second or ms^-1
Define instantaneous speed.
Instantaneous Speed is the speed of a car taken at a very small time interval and can be calculated by getting the tangent to a line on a distance time graph.
Describe the difference between velocity and speed.
Velocity is a vector quantity as it is in a certain direction and uses displacement instead of distance
Formula for acceleration
Change in velocity divided by change in time or ms^-2
Minus the initial velocity from the final velocity and divide that value by the time taken
What is the area under a velocity time graph show?
Displacement
What do the letters of suvat stand for?
S-Displacement U-initial velocity V-Final Velocity A-Acceleration T-Time taken
What are the components of a stopping distance and define what they mean?
Thinking Distance- Is the distance between seeing the reason to stop and the moment the driver presses on the brakes
Braking Distance- is the distance travelled after the brakes have been applied till when the cars comes to a stop.
How do you calculate Thinking Distance?
Speed x Reaction time
Acceleration Due to Gravitys value?
9.81ms^-2
Think of a way to calculate gravity?
An electromagnet holds a small steel ball above a trapdoor. When the current is switched off, a timer is triggered, the electromagnet demagnetises, and the ball falls. When it hits the trap door it triggers the timer to stop
Talk about projectile motion
The vertical velocity is affected by gravity. Then with this value calculate the time it is in the air and then calculate the vertical distance using speed = distance over time