8.3. Quantities and untis Flashcards
1
Q
What is the weight of an object?
A
The weight (or gravitational force) acts vertically downwards.
2
Q
What is the normal reaction force?
A
The force which acts perpendicular to a surface when an object is in contact with the surface.
3
Q
What is friction?
A
A force which opposes the motion between two rough surfaces
4
Q
What is tension?
A
If an object is being pulled by a string, the force acting on it is called the tension in the string.
5
Q
What is thrust/compression?
A
In an object is being pushed along using a light rod, the force acting on the object is called the thrust or compression in the rod.
6
Q
What is buoyancy?
A
The upward force on a body that allows it to float or rise when submerged in a liquid.
7
Q
What is air resistance?
A
Opposes motion.
