Random Forces Flashcards
What is an equilibrium?
When an object is at rest, is moving at a steady pace or has a resultant force of 0N
When is an object elastic?
When it returns to its original length after being stretched.
What is another name for upthrust
Buoyancy
What does the force of friction do?
Opposes motion
How can friction be reduced
Through lubrication and streamlining
What are free-body diagrams used for?
Free-body diagrams are diagrams used to show the size and direction of all forces acting upon an object in a situation.
What does the length of the arrow in a free body diagram represent?
The magnitude
What is the scientific meaning of a fluid?
a fluid is a substance that continually deforms (flows) under an applied shear stress
What is motion?
The change in position
What is speed?
The rate at which an object covers distance
What is acceleration
the rate at which speed changes.
What is deceleration
Negative acceleration
Remove the zero
What does the slope of a distance time graph graph tell you?
In a distance-time graph, the slope or gradient of the line is equal to the speed of the object
What does the gradient of a speed time graph represent
The gradient of speed-time and velocity-time graphs represent acceleration
What does the area under a speed time graph represent?
The area under a speed-time graph represents the distance travelled
What is terminal velocity
the constant speed that a freely falling object eventually reaches when all the forces acting on it are balanced
How can an electromagnet be made stronger?
▶ Increasing the number of turns in the solenoid
▶ Increasing the current strength flowing through the solenoid
▶ By placing a soft iron core inside the solenoid
- soft means that it is easily magnetised
What do waves do?
Transfer energy from one point to another.
What is the high peak of a wave called
Peak
What is the low peak of a wave called
Trough
Is the following a transverse or longitudinal wave?
Light reaching your eye
What is the line of propagation
The central line through which the wave goes
What is a wave length
A repeated point on the wave
What is the line from the line of propagation to they peak/trough called?
Amplitude
Where can light-eye wave travel
In a vacuum
What is the scientific method?
A way to ask and answer scientific questions.
What are the steps of the scientific method
Problem Hypothesis Experiment Data Conclusion Publish
What is velocity
the speed of something in a given direction
