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# Bella S2

### Forces

What is a force a push, pull or twist on an object
What are the units of Force Newtons (N)
What is the symbol for force F
What can a force do to any object? Change its speed shape or direction
What are the units for speed? M/S or MS-1
What is the formula for distance? D=VT
What are the units of distance? M
What word do we use to describe the forces acting on an object at rest? Balanced
What are the units of acceleration? M/S2 or MS-2
What is the word we use to describe the forces acting on an object that is slowing down? Unbalanced
What is the relationship between pressure and surface area? The smaller the surface area the greater the pressure OR the greater the surface area the smaller the pressure
What is the formula for Pressure? P=F/area
What are the units of pressure? N/cm2
What can you do to the texture of an object to reduce friction? make it smoother
What is the force of gravity on Earth? 10N/kg
What name do we give for the force that is generated when 2 objects rub together? Friction
What word is used to describe an object whose speed keeps on increasing? Accelerating
Does a tack produce higher or lower pressure at its pointy end? Higher
What is the name for the type of friction generated between an object and the air Air resistance
Does a tack produce higher or lower pressure at its flat end Lower
How can you increase air resistance Increase the surface area of the object (OR make object rougher)
Why does a tack produce lower pressure at its flat end? It has a higher surface area
If the forces acting on an object are unbalanced, what happens to the object? It either accelerates or decelerates
What is the formula for weight W=mg
What is the relationship between and area and pressure The greater the area the lower the pressure Or]The lower the area the greater the pressure
Created by: nscobie