# PHYSICS -Scalar and Vector Quantities and FORCES

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• Created by: bocceer
• Created on: 26-04-16 19:50

Scalar quantites have a magnitude only

Vector quantites have a magnitude and an associated direction

Vector quantites include:

• displacement
• velocity
• acceleration
• force
• weight
• momentum

Scalar quantites include:

• distance
• speed
• time
• power
• energy
• mass

Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.

Forces:

A force is a push or a pull that acts on an object due to the interaction with another object.

There are two types of forces:

• Contact forces - the objects are physically touching
• e.g friction, air resistance, tention and normal contact force
• Non-contact forces - the objects are physically seperated
• e.g gravitational force, electrostatic force, and magnetic force

Forces are vector quantities and we can use arrows to represent their magnitude and direction.

Weight is the force acting on an object due to gravity.

The weight of an object depends on the gravitational feild strength at the…