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• What are vectors? -✓✓Quantities that have a magnitude and a
direction
• What are scalars? -✓✓Quantities that only have a magnitude
• Examples of vectors -✓✓Force
Velocity
Displacement
Acceleration
Momentum
• Examples of scalars -✓✓Speed
Distance
Mass
Temperature
Time
• What are contact forces? -✓✓Forces that act when two objects are
touching
,• What are non-contact forces? -✓✓Forces that act without the need
for two objects to be touching
• Examples of contact forces -✓✓Friction
Air resistance
Tension in ropes
Normal contact force
• Examples of non-contact forces -✓✓Magnetic force
Gravitational force
Electrostatic force
• What is mass? -✓✓The amount of material an object is made of
It is the same value everywhere
Measured using a mass balance
• What is weight? -✓✓The force acting on an object due to gravity
It depends on the strength of the gravitational field at the location of
the object
Measured using a calibrated spring balance - newtonmeter
,• Equation for Weight -✓✓Weight (N) = Mass (kg) x Gravitational Field
Strength (N/kg)
W=mg
• What is weight directly proportional to? -✓✓Mass
• What are free body diagrams? -✓✓Diagrams that show all the forces
acting on an object
• What is the minimum number of forces acting on an object in real
situations? -✓✓At least 2 forces
• What is the resultant force? -✓✓The single force that replaces
multiple forces acting at a single point
• How is work done? -✓✓When a force moves an object through a
distance, energy is transferred and work is done on the object
• Equation for 'Work Done' -✓✓Work done (J) = Force (N) x Distance
(m)
W=Fs
• What is 1J equal to? -✓✓1Nm
, • What could happen when you apply a force to an object? -✓✓It may
stretch, compress or bend
• What happens when an object is inelastically deformed? -✓✓The
object won't return to its original shape and length after the force has
been removed
• Equation for Force 1 -✓✓Force (N) = Spring Constant (N/m) x
Extension (m)
F=ke
• What is extension directly proportional to? -✓✓The force applied
F∝e
• The stiffer the spring... -✓✓...The greater the spring constant
• What is the limit of proportionality? -✓✓The point at which
extension is no longer directly proportional to force
• Equation for 'Moments' -✓✓Moment of a force (Nm) = Force (N) x
Distance (m)
M=Fd