Vector quantities - ANSWER have magnitude and direction
Examples of vector quantities - ANSWER force, velocity, momentum, acceleration
Scalar quantities - ANSWER Only have magnitude and no direction
Examples of scalar quantities - ANSWER speed, distance, time
Vectors - ANSWER represented by an arrow - the length of the arrow shows the magnitude. The
direction of the arrow shows the direction of the quantity
A force is - ANSWER a push or pull on an object that is caused by it interacting with something
when two objects are touching for the force to act, its a .... - ANSWER contact force
examples of contact forces - ANSWER friction, air resistance, tension in ropes. etc
If the objects do not need to be touching for the force to act, the force is a ...... - ANSWER non contact
force
examples of non contact forces - ANSWER magnetic force and gravitational force
Two effects of gravity - ANSWER - makes all things fall towards the ground
- gives everything a weight
,What is mass? - ANSWER The amount of material an object is made of
It is the same value everywhere
Measured using a mass balance
What is weight? - ANSWER 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 - ANSWER Weight (N) = Mass (kg) x Gravitational Field Strength (N/kg)
W=mg
What is weight directly proportional to? - ANSWER mass
What are free body diagrams? - ANSWER Diagrams that show all the forces acting on an object
What is the resultant force? - ANSWER The single force that replaces multiple forces acting at a single
point
How is work done? - ANSWER When a force moves an object through a distance, energy is transferred
and work is done on the object
Equation for 'Work Done' - ANSWER Work done (J) = Force (N) x Distance (m)
W=Fs
What is 1J equal to? - ANSWER 1Nm
, If all the forces acting on an object combine to give a resultant force of zero then the object is in ? -
ANSWER equilibrium
What could happen when you apply a force to an object? - ANSWER It may stretch, compress or bend
What happens when an object is elastically deformed - ANSWER The object can go back to its original
shape and length after the force has been removed
What happens when an object is inelastically deformed? - ANSWER The object won't return to its
original shape and length after the force has been removed
Equation for Force 1 - ANSWER Force (N) = Spring Constant (N/m) x Extension (m)
F=ke
Extension is directly proportional to? (Hooke's Law) - ANSWER The force applied
F∝e
What is the limit of proportionality? - ANSWER The point at which extension is no longer directly
proportional to force
Practical: Investigating the link between force and extension - ANSWER - First, measure the original
length of the spring using a milimetre ruler
- Next, add different masses on the spring and measure the length of the spring in each case.
- The extension = change in length
- Repeat this process until you have enough measurements ( no fewer than 6)
- Plot a graph with extension of the spring on the x axis and force on the y axis.
- The graph will only start to curve if you exceed the limit of proportionality
Examples of vector quantities - ANSWER force, velocity, momentum, acceleration
Scalar quantities - ANSWER Only have magnitude and no direction
Examples of scalar quantities - ANSWER speed, distance, time
Vectors - ANSWER represented by an arrow - the length of the arrow shows the magnitude. The
direction of the arrow shows the direction of the quantity
A force is - ANSWER a push or pull on an object that is caused by it interacting with something
when two objects are touching for the force to act, its a .... - ANSWER contact force
examples of contact forces - ANSWER friction, air resistance, tension in ropes. etc
If the objects do not need to be touching for the force to act, the force is a ...... - ANSWER non contact
force
examples of non contact forces - ANSWER magnetic force and gravitational force
Two effects of gravity - ANSWER - makes all things fall towards the ground
- gives everything a weight
,What is mass? - ANSWER The amount of material an object is made of
It is the same value everywhere
Measured using a mass balance
What is weight? - ANSWER 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 - ANSWER Weight (N) = Mass (kg) x Gravitational Field Strength (N/kg)
W=mg
What is weight directly proportional to? - ANSWER mass
What are free body diagrams? - ANSWER Diagrams that show all the forces acting on an object
What is the resultant force? - ANSWER The single force that replaces multiple forces acting at a single
point
How is work done? - ANSWER When a force moves an object through a distance, energy is transferred
and work is done on the object
Equation for 'Work Done' - ANSWER Work done (J) = Force (N) x Distance (m)
W=Fs
What is 1J equal to? - ANSWER 1Nm
, If all the forces acting on an object combine to give a resultant force of zero then the object is in ? -
ANSWER equilibrium
What could happen when you apply a force to an object? - ANSWER It may stretch, compress or bend
What happens when an object is elastically deformed - ANSWER The object can go back to its original
shape and length after the force has been removed
What happens when an object is inelastically deformed? - ANSWER The object won't return to its
original shape and length after the force has been removed
Equation for Force 1 - ANSWER Force (N) = Spring Constant (N/m) x Extension (m)
F=ke
Extension is directly proportional to? (Hooke's Law) - ANSWER The force applied
F∝e
What is the limit of proportionality? - ANSWER The point at which extension is no longer directly
proportional to force
Practical: Investigating the link between force and extension - ANSWER - First, measure the original
length of the spring using a milimetre ruler
- Next, add different masses on the spring and measure the length of the spring in each case.
- The extension = change in length
- Repeat this process until you have enough measurements ( no fewer than 6)
- Plot a graph with extension of the spring on the x axis and force on the y axis.
- The graph will only start to curve if you exceed the limit of proportionality
