Physics: Identifying forces, Resultant forces and Vectors + Scalars

Forces can be described as...

Contact or non-contact

What is weight?

The force that acts on an object due to gravity

Name some contact forces

Air resistance, drag, buoyancy, friction, lift.

Name some non-contact forces

Electrostatic, magnetic, gravitational force /weight

What is forces measured in?

Newtons

What happens when the forces are balanced?

The object will move at a constant speed or remain stationary

What is the resultant force when forces are balanced?

The resultant force is zero.

What happens when the forces are unbalanced?

The object will cange shape, speed or direction.

What is the resultant force when forces are unbalanced?

The resultant force is non-zero.

What is a vector?

a quantity that has both magnitude and direction

What is a Scalar?

a quantity that has only magnitude

Name some examples of Vectors

Force, velocity, momentum, weight, electromagnetic fields, acceleration, friction

Name some examples of Scalars

Time, mass, length, speed, distance, power, energy, volume.

How to calculate the resultant force?

Subtract the larger value by the smaller value, add N to the direction.