Forces Y7+8. Flashcards
What is mass?
The amount of matter in an object
What is the force of something measured in?
Newtons…N
What do you do to find your weight on earth?
x10/9.8…e.g if you weigh 30 kg (mass), your weight is 30kg x 9.8 = 343N
What is the formula to find the speed of something
Distance divided by time
What are the six forces?
Gravity, weight, air resistance, upthrust, thrust and friction.
Which planet has the strongest GFS?
Jupiter
What do you use to find your mass?
A weighing scale
In a Distance-Time graph, which goes on the y-axis?
Distance
What does the strength of gravity depend on?
The distance between the two objects and size of the objects
What is the name of the force that opposes every force against it?
Reaction force
On a graph, how do you know if the vehicle is stationary?
There is a horizontal straight line
On a graph, how do you know when a vehicle is faster than another?
It has a steeper gradient
Which force keeps objects afloat?
Upthrust
What is friction?
The contact between two touching objects
What is the name of the force that you carry out on another object?
Applied force
Acceleration
How quickly speed increases or decreases
Air resistance
The force on an object moving through the air that causes it to slow down (also known as drag)
Contact force
Force that acts by direct contact e.g friction
Equilibrium
State of an object when all forces are balanced
Gravitational Field
The region where other objects feel a gravitational force
Driving force
A force that is pushing or pulling something
Resistive force
Any force that acts to slow downs moving object
Speed
How much distance is covered in a given time
Distance time graph
A graph that shows how far an object moves each second
Balanced (forces)
Forces acting on an object that are the same size but act in opposite directions
Newtonmeter
A piece of equipment used to measure weight in Newtons
What is the equation for stress?
force (N)
Stress= ————
area(m^2)
