Forces HL Flashcards
What is force measured in?
Newtons
What type of force are air resistance and water resistance?
Drag
Friction is a type of _______ force.
Contact
What is it called when you have stretched a spring so much that when you remove the force, it will not go back to it’s original length?
Elastic Limit
What happens to the chair if you sit on it?
The chair deforms
What is the name of the point where a see-saw turns?
A pivot
Why do tightrope walkers have a long pole?
They use it to balance. Most of the mass goes to the pole so they have more stability.
If of gas is in a 1 litre container and the same volume of gas is in a 500 ml container, which one will have more pressure inside?
The smaller container because there are more gas particles hitting the sides of the container.
What is the formula for fluid pressure?
Fluid Pressure (N/m2) = Force (N)
Area (m2)Why does a balloon burst if you blow it up too much?
There are too many gas particles hitting the side of the balloon and therefore stretching it too much.
Why is liquid used in pistons and not a solid?
Liquids are incompressible but solids aren’t.
What important thing do mountain climbers take with them when climbing tall mountains?
Oxygen tanks because there is less pressure in the atmosphere higher up. There is less pressure at the top because gravity pulls the air molecules towards sea level.
How many Newtons is gravity on earth?
10N
Why is dam thicker at the bottom and thinner at the top?
There is more pressure at the bottom of a lake or ocean than at the top. This is because there are more water molecules pushing down the deeper you go.
What is the name of the force that pulls things upwards?
Upthrust
Is gravity a push or pull force?
Pull
