AC-HPAT Physics Certification Review Exam Questions And Answers.
9 views 0 purchase
Course
AC HPAT
Institution
AC HPAT
What is Newton's first law? An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
What are scalar and vector quantities? Examples. Scalars are quantities that only have magnitude (or size), ...
distance - correct answer The length of a path between two points
Displacement - correct answer Distance and direction of an object's change in
position from the starting point.
position - correct answer the location of an object
Speed - correct answer The distance an object travels per unit of time
Acceleration - correct answer The rate at which velocity changes
instantaneous speed - correct answer the speed of an object at one instant of
time
Force - correct answer A push or pull on a object
net force - correct answer The combination of all forces acting on an object
constant speed - correct answer Speed that does not change
instantaneous speed - correct answer the speed of an object at one instant of
time
average speed - correct answer total distance divided by total time
, Newton's first law ( Aka Law of Inertia) - correct answer "An object at rest
remains at rest, and an object in motion will remain in motion unless acted upon by some external net
force."
A rock for example will remain at rest, it won't start spontaneously moving. An object in motion, that
does not encounter any friction will keep moving, like an object floating in space.
Newton's Second Law - correct answer Force = mass x acceleration ( F=ma)
To find acceleration: A= F/ m
" the acceleration an object experiences is directly proportional to the applied force and inversely ( in
the opposite manner) proportional to its mass.
Newton's Third Law - correct answer For every action there is an equal and
opposite reaction.
As a car hits a wall, it's force is applied to the wall but the force of the wall also acts on the car.
Remember, there can never be a single isolated force, forces always come in pairs.
coefficient of friction - correct answer the ratio of the force of friction to the
normal force acting between two objects. When you find a coefficient of friction, you're calculating the
resistance to motion at the interface of two surfaces of similar or dissimilar materials.
( a brick sliding on a clean wooden table, the coefficient of kinetic friction is about 0.5)
Torque - correct answer a turning or twisting force. Represented by T
Formula: T=Fd
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 EFT, 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 this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller RealGrades. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R242,71. You're not tied to anything after your purchase.
