Physics - Forces (entirety)

Physics

What are forces measured in?

Newtons

Examples of contact forces

• friction

• air resistance

• tension

• normal contact force

Examples of non contact forces

• gravitational

• electrostatic

• magnetic

What is a vector?

Quantities with both magnitude and direction.

For example: velocity, distance, displacement

Whats a scalar?

Quantities that only have a magnitude (size)

For example: mass as it has no direction

Whats the gravitation energy of the earth?

9.8

Whats the unit for work done?

Joules

Examples of scalar

distance, speed, mass, energy, volume, density, temperature, power

examples of vector

displacement, velocity, weight, force, acceleration, momentum

unit for weight

N

How can you measure weight

newtonmeter