Summary
Summary A level Dynamics unit 1 physics
- Course
- Institution
Summary of 1 pages for the course PH1 - Motion, Energy & Charge at WJEC (Dynamics notes)
[Show more]
Seller
Follow
careyneale2005
Content preview
Newtons 1st Law Net Force: 2NT DRAG: DERIVING NIL: CENTRE OF GRAVIT
definition: If an object 4N - 2N = 2N - acceleration is not constant. EF-Ma definition: the point w
is moving in constant downwards ☐ ←
- Due to resistive forces. F- AT = Mv-My the entire weight of a
motion or at rest it 4N - Experienced by objects falling, t acts. W-mg
remains this way unless Object being pulled: mg travelling through fluid, vehicles... F- MCV-4) → F- = ma
acted on by resultant force. calculate (h) + (V) components - object collides with air particles t
• Newtons 2nd Law if V-mg A =D then object through the air causing air resistance. FORCES ON A SLOPE: MOMENTS:
Ef- Ma is travelling at constant motion or - Friction occurs due to the tyres vertical = moment = Force ✗ perp
definition: the resultant force is at rest. against surface of road 90-0 Mg COS ⊖ x dista
directly proportional to the rate D α v2 horizontal = f the
normal
of change in momentum of the Object supported Factors affecting drag: o) w mg sin@ pivot
object in the direction of the force. e. g on table • surface area of object
Newtons 3rd Law equal + opposite force • speed of object.
EF-W-D
EXAMPLES OF MOMENTS: PRINCIPL
definition: If object A exerts a of normal and weight MOMENTS
weight DRAG GRAPH TE5N calculate the moment: For an ob
force on object B, object B gradient =
x
exerts an equal but opposite 4 acceleration 30 X is perpendicular to equilibriu
V
force on A. If object in fluid: acceleration is line of action of the sum of clo
0.2m
constant velocity = EF:O U- up thrust decreasing to force (SN) moments
a= 0 w- weight ignritddient-9.81ms-2 terminal To find ×: ✗ = opposite angle point is eq
• : --W
I - , T-mg w velocity sin (301×0-2=0. Im the sum o
2h
Finding Tension: t 9=0, EF:O a 2=0. Im clockwise
{F- T-W PRESSURE in a fluid ÷ about the
NE5YEG INS 2ND LAW
ma- T-W P-① = mg m-density ✗ vol MENT: M=Fd point.
T-math A {F- ma The moment = 5 × 0.1 = 0-SNM EACH =
DENSITY i.In:
1m94
✗ IF = m To determine unknown mass The mass of the
p=m_ (Rgm-3) Pep# =p Ang = phg Apparatus light gataeemefaaf.ge is kept constant
A gradient = M glider of pulley one slotted mass
unknown
• measure mass using a mass balance. mass masses and putting
•
• measure volume with vernier calliper. P=phg = density ✗ height ✗ gravity Force (N) air track mates glider for each read
hanging
• Irregular shapes can be submerged and acceleration
in a known amount of water and MOMENTUM
displaced water = volume of material. • principle of momentum: sum of momenta p-Mv (Rgm5') Rearranging N2L EF-ma to get momentum
e.g before a collision is equal to the sum of → (MMaalltath Mb)bVU_j_mMna,ryatA Mbb {F- ma → {F- DI
250-100 momenta after a collision provided no
= 150m/ resultant force acts ✓ = MA X " " change in momentum = EF ✗ At
100mL 250m/ • conservation of energy: (mat Mb' impulse = change in momentum (P2-
F
Ml → cm³ = ÷ 106 . energy cannot be created or destroyed, it area = impulse/change in mo
150 ÷ × 106 = 1-5×10-4cm³ can only be transferred from one form ↳ calculate by using trapez
to the n act. t triangles + squares (appro
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 careyneale2005. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $4.57. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
56326 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now