AQA AS Physics - Mechanics and Materials Exam Questions and Answers 100% Pass
5 views 0 purchase
Course
AQA AS
Institution
AQA AS
AQA AS Physics - Mechanics and Materials Exam Questions and Answers 100% Pass
Scalar
A unit with magnitude but no direction.
Vector
A unit with magnitude and direction.
What are the two methods for adding vectors?
Scale drawings and trigonometry.
Free-body force diagrams
Show al...
AQA AS Physics - Mechanics and Materials
Exam Questions and Answers 100% Pass
Scalar
A unit with magnitude but no direction.
Vector
A unit with magnitude and direction.
What are the two methods for adding vectors?
Scale drawings and trigonometry.
Free-body force diagrams
Show all the forces acting on a body, each arrow shows the size and the direction of the force.
Equilibrium
The forces acting on a body are balances and it is not accelerating (it may be at rest or at a constant
velocity).
Moment
The turning effect of a force.
Moment equation
Force x perpendicular distance from the pivot.
Moment unit
Nm
If the moments on an object are not balanced,
it will turn.
Principle of Moments
For a body to be in equilibrium, the sum of the clockwise moments about a point must be equal to the
sum of the anticlockwise moments about the same point.
Levers
In a lever an effort force acts against the load force about a rigid object (the lever) attached to a pivot.
Couple
A pair of equal and opposite coplanar forces (they act parallel to each other).
What does a couple cause?
No resultant linear force, but a turning effect (a moment).
, The moment created by a couple
The size of the moment depends on the size of the forces and the distance between them.
Couple equation
Moment of a couple = size of one force x perpendicular distance between the forces.
Centre of mass
The point at which the mass of the object acts.
Where is the centre of mass of a uniform, regular solid?
At its centre.
The centre of mass can be found through...
Symmetry and experiment (hanging it and drawing a vertical line down, repeating this - where the
lines cross is where the centre of mass is).
How can centre of mass be used to stabilise objects?
If the line drawn downwards from the centre of mass passes within the base area, then the object will
be stable.
Free fall
The motion of an object undergoing acceleration due to gravity.
The only force acting on an object in free fall
Weight
Objects in free fall...
accelerate at the same rate.
Newton's first law
An object will remain at rest or at a constant velocity as long as there is no resultant force.
If the forces on an object aren't balanced, it will...
accelerate
Newton's second law
The resultant force is proportional to the acceleration of the object (F = ma)
Newton's third law
Each force has an equal and opposite reaction force.
Friction
A force that opposes motion.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller ACADEMICAIDSTORE. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.69. You're not tied to anything after your purchase.
