Motion and pressure

What is speed?

how far something moves in a certain time

How do you calculate speed?

distance/time

What is relative motion?

Compares how fast one object is moving to another

What is pressure?

the force exerted on a surface because of weight, and

is measured in newtons per metre squared or Pascal (Pa).

How do you calculate pressure?

pressure = force/area

What do collisions between gas particles and their container produce?

Gas pressure

What happens if you compress a gas into a smaller volume?

There are more collisions, so therefore a higher pressure

What happens if you heat a gas?

The particles will have more energy

What is atmospheric pressure?

the pressure exerted by the weight of the atmosphere

What are moments?

The turning effect of a force

What is the unit for moment?

Newton metres (Nm)

How do you calculate a moment?

moment = force x perpendicular distance from pivot

What are solids and liquids?

incompressible

Why do objects float?

The upthrust of the object is equal to the object's weight, thus the force balances