Science Revision - Forces Flashcards
1
Q
Force
A
A push, pull or twist.
2
Q
Newton
A
Unit of force/ weight. Measured with a Newton metre.
3
Q
Upthrust
A
Upward force that acts in water against gravity.
4
Q
Friction
A
Contact force between moving objects. Can be reduced by lubrication or smoothing.
5
Q
Reaction Force
A
Contact force between an object and the thing it is resting on. Its value is equal and opposite to the weight of the object.
6
Q
Air Resistance
A
A force that acts in the air. It slows objects down.
7
Q
Mass
A
Measured in kg. This quantity does not change.
8
Q
Weight
A
Measured in Newtons. Its value is dependent upon gravity.
9
Q
Drag
A
A type of friction in water or air, that slows the motion of an object.
