Revision Science Test Flashcards
What does weight do?
It keeps you on the ground
When is friction useful?
When warming your hands, or making a fire, all centred around the idea of creating heat.
When is friction unuseful?
When trying to pass to someone in ice hockey and it goes too quickly.
What is push?
The force making an object go forwards.
What forces are acting on a vertically rising hot air balloon?
Air Resitance, Weight, push and lift
What is water resistance?
The force on an object moving through water that slows it down?
If a shark is going forward, what force is making it do that?
Thrust
What nationality is Archemedes?
Greek
What is mass?
The amount of matter an object is made out of
What is lubrication?
A substance that reduces friction between surfaces when they rub together
What is a push caused by an engine called?
Thrust
What pulls objects towards the centre of the earth?
Weight
When drawing a force diagram, what do the length of the arrows represent?
The size of the force
When the forces on an object are balanced, it will remain……….
Stationary
When the forces are unbalanced, the object will………. or …………….
Accelerate or Decelerate
How many grams are in a newton?
100
What is the name of the force pushing upwards on a flying object?
Lift
What force makes an object float?
Upthrust-not buoyancy!
What is mass measured in?
Mass is measured in grams, kilograms and so on
What opposes motion?
Friction!
A streamlined shape has……
A rounded front, smooth shape and a tapering tail
What is density?
Density is how much of something there is in a certain volume
What is the equation of density?
Mass divided by volume
What is the equation for volume?
Mass divided by density
