Summary (Samenvatting) Nova 3TTO Physics Chapter 2.1-2.4: Forces
7 views 0 purchase
Course
Physics
Level
VWO / Gymnasium
A very detailed summary of chapter 2.1-2.4 of the book Nova for 3TTO students. The summary is 5 pages long and includes pictures, tables and key concepts!
Learn this summary well, and easily get a good grade for your upcoming test!
Have fun learning!
- Elastic deformation the object goes back to the original shape after a force being executed on
it.
- Plastic deformation the shape of the object does not go back to the original shape after a
force.
- Forces can push or pull something
- Forces can change the velocity or direction of an object
Types of forces:
1. Muscular strength
2. Resilience springy material
3. Tension in rope
4. Gravity Fgravity = m x g
5. Magnetic
Measuring forces
- You can measure forces using a dynamometer
Fg = m x g
Where:
- Fg is the force of gravity in newtons (N)
- m is the mass in kilograms (kg)
- g is the gravity on the Earth’s surface in newtons per kilogram (N/kg)
Drawing forces
- A force has a magnitude, a direction and a point of application. A variable with these properties
is called a vector.
o The length of the arrow gives the magnitude
o The direction shows the direction of the force
o The starting point of the vector shows where the force is being exerted
Centre of gravity
- Gravity applies on all points on an object.
o But you draw an arrow (vector) from the center of gravity C.
It’s not always in the middle!
, 2.2 More than one force
Two forces in equilibrium
- 2 forces are cancelling each other out
o They are in equilibrium
o The forces are equal and in opposite direction
So nothing happens
- The fruit bowl pushes the table down a little bit
o The tabletop exerts a force upwards on the fruit bow, perpendicular to the tabletop.
This is called normal force Fn
Force and extension
- The extension is the amount that a spring stretches
o It is the number of centimeters that the length of the spring increases in
comparison with the zero position.
- The extension is directly proportional to the force
o Because of this, you always get the same value if you divide the force by the
corresponding extension.
The value C is called the spring constant.
- C = F/x
o C is the spring constant in newtons per meter (N/m)
o F is the force that pulls on the spring in newtons (N)
o x is the extension of the spring in meters (m).
- Spring constants are often given in N/cm, this is more convenient
Determining the resultant
- When forces are in equilibrium the resultant Fres on the object is 0N
o All the forces added up to each other
Adding forces together
- If two forces are acting in different direction you can use the parallelogram method
1. Choose a suitable scale of forces
2. Draw in the two forces at correct scale and correct angles
3. Complete the parallelogram
4. Draw the resultant arrow to the opposite corner
5. Measure the length of the arrow. Use the scale to determine the magnitude
6. Determine the direction of the resultant by measuring the angle
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 maxvandorsser. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.21. You're not tied to anything after your purchase.
