click below
click below
Normal Size Small Size show me how
7K (c and d)
Science 7
Question | Answer |
---|---|
balanced forces | When two forces are the same strength, but working in opposite directions |
elastic | Any substance that will return to its original shape and size after it has been stretched or squashed |
gram | A unit for measuring mass (g) |
gravity | The force of attraction between any two objects |
kilogram | A unit for measuring mass (kg) |
mass | The amount of matter that something is made of |
newton | The unit of force (N) |
stationary | Not moving |
unbalanced forces | When two forces working in opposite directions are not the same strength |
weight | The amount of force with which gravity pulls something towards the Earth. It is measured in newtons. |
air resistance | A force that tries to slow things down that are moving through the air. It is a type of friction. |
friction | A force that tries to slow things down when two things rub against each other |
lubricant | A substance (normally a liquid) used to reduce friction |
lubrication | Adding a lubricant to something |
water resistance | A force that tries to slow things down that are moving through water. It is a type of friction. |