Forces

Question 1

Identify and describe scaler qualities and vector qualities

Answer 1

Scaler - only have magnitude and no direction. Speed, distance, temperature, mass and time.

Vector - magnitude and direction. Force, velocity, displacement, acceleration and momentum.

Question 2

Identify and give examples of forces as contact or non-contact forces

Answer 2

Contact: friction, tension, air resistance and normal contact force.

Non-contact: gravitational force, electrostatic and magnetic force.

Question 3

Describe the interaction between two objects and the force produced on each as a
vector

Question 4

Describe weight and explain that its magnitude at a point depends on the gravitational
field strength

Answer 4

Weight - force that acts on an object due to gravity.

Question 5

Calculate weight by recalling and using the equation: [ W = mg ]

Answer 5

Weight = Mass x Gravitational proportion

Question 6

Represent the weight of an object as acting at a single point which is referred to as the
object’s ‘centre of mass’
Calculate the resultant of two forces that act in a straight line
HT ONLY: describe examples of the forces acting on an isolated object or system
HT ONLY: Use free body diagrams to qualitatively describe examples where several
forces act on an object and explain how that leads to a single resultant force or no
force
HT ONLY: Use free body diagrams and accurate vector diagrams to scale, to resolve
multiple forces and show magnitude and direction of the resultant
HT ONLY: Use vector diagrams to illustrate resolution of forces, equilibrium
situations and determine the resultant of two forces, to include both magnitude and
direction

Describe energy transfers involved when work is done and calculate the work done by
recalling and using the equation: [ W = Fs ]
Describe what a joule is and state what the joule is derived from
Convert between newton-metres and joules.
Explain why work done against the frictional forces acting on an object causes a rise in
the temperature of the object

Question 7

Calculate the resultant of two forces that act in a straight line

Question 8

HT ONLY: describe examples of the forces acting on an isolated object or system

Question 9

HT ONLY: Use free body diagrams to qualitatively describe examples where several
forces act on an object and explain how that leads to a single resultant force or no
force

Question 10

HT ONLY: Use free body diagrams and accurate vector diagrams to scale, to resolve
multiple forces and show magnitude and direction of the resultant

Question 11

HT ONLY: Use vector diagrams to illustrate resolution of forces, equilibrium
situations and determine the resultant of two forces, to include both magnitude and
direction

Question 12

Describe energy transfers involved when work is done and calculate the work done by
recalling and using the equation: [ W = Fs ]

Question 13

Describe what a joule is and state what the joule is derived from

Question 14

Convert between newton-metres and joules.

Question 15

Explain why work done against the frictional forces acting on an object causes a rise in
the temperature of the object