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Bella S2
Forces
| Question | Answer |
|---|---|
| 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 the surface 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 |
| What can you do to the shape of the surface of an object to reduce friction? | Make it more streamlined (more pointy) |
| What are the units of density? | grams per cm 3 |
| What happens to a Liquid that is MORE dense than the liquid it is placed in? | It sinks |
| What is more dense a solid substance or a liquid substance? | Solid |
| What happens to a solid that is LESS dense than the liquid that it is placed in? | It floats |
| What happens to a solid that is MORE dense than the liquid it is placed in? | It sinks |
| What happens to a liquid that is LESS dense than the liquid that it is placed in? | It floats on the surface. |
Created by:
nscobie