Forces Flashcards
What is friction?
A force which will slow down a moving object due to two surfaces rubbing together.
Drag and Friction are both what type of force?
Contact force.
What is a moment?
A moment is the turning effect of a force (measured in Newton meters).
How do we calculate the moment?
Moment (Nm)= force (N) x distance from pivot (m)
When an object such as a seesaw is balanced, the clockwise and anti-clockwise moments will be equal & opposite, which is known as…
Equilibrium!
Some objects, like springs, can be stretched, the amount that they stretch is know as..
The extension!
If an object obeys Hooke’s law it will have a linear relationship.. what is a linear relationship?
If the force applied to the spring is doubled, the extension doubled too.
Gas pressure is caused by..
particles of a gas colliding with the wall of the container which they are in.
Gas pressure can be increased by.. (2)
-Heating the gas (so the gas particles move more quickly and collide with the container
-Increasing the amount of particles within the same volume (so there are more collisions)
What is atmospheric pressure?
The pressure which the air exerts on you all of the time
The pressure which is exerted on a solid is called…
Stress
How do you calculate pressure?
Force/area
True are false.. liquids are incompressible.
True!
