Physics Flashcards
What is Upthrust
Upthrust is a force that helps objects float
What does a weight of an object depend on?
Mass
What does mass measure and what does it not have?
Mass measures the amount of matter in something and does not have a direction
Is displacement a vector or scalar quantity?
Vector quantity
What is the displacement?
The distance covered in a straight line and has a direction.
What are vector quantities?
Quantities with both size and direction
What quantity are forces?
Vector quantities
What does speed tell you about an object?
How fast it moves in a certain time
What does speed tell you about an object?
How far it moves in a certain time
What is velocity?
Speed in a particular direction
What is acceleration?
Acceleration is a measure of how fast velocity is changing
What is momentum?
Momentum is a combination of mass and velocity
What are scalar quantities?
Quantities that do nit have a direction
Give three examples of scalar quantities
Distance Speed Energy Time Frequency Temperature Speed Volume Charge
What is the average speed limit on a motorway? {meters per second}
31 m/s
What is the average speed of a walking person? {meters per second}
1.4 m/s
What is the average speed of a cyclist? {meters per second}
6 m/s
What is the average speed of an aeroplane? {meters per second}
230 m/s
What is the average speed limit in a town? {meters per second}
13 m/s
What is the average speed of a commuter train? {meters per second}
55 m/s
What is the average speed of sound in air? {meters per second}
330 m/s
What is the SI standard unit for measuring speed?
Meters per second {m/s}
What is the equation for working out speed?
Speed = distance / time
What is the equation for working out distance?
Distance = speed X time
What is the equation for working out time?
Time = distance / speed
What can a distance/time graph never have?
A lone going in a downwards direction
What does a displacement/time graph represent?
The distance from a specific place
What is displacement?
Displacement is the distance you are in a straight line away from where you started
What is acceleration?
Acceleration is a change in velocity over a time period
What type of quantity is acceleration?
A vector quantity
What are the units for acceleration and how do we write it?
Meters per second per second
M/s ^2