Exam (elaborations)
AC-HPAT Physics Questions with correct Answers 2024
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Exam of 7 pages for the course AC-HPAT at AC-HPAT (AC-HPAT Physics)
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AC-HPAT Physicsdistance - answer The length of a path between two points
Displacement - answer Distance and direction of an object's change in position from the
starting point.
position - answer the location of an object
Speed - answer The distance an object travels per unit of time
Acceleration - answer The rate at which velocity changes
instantaneous speed - answer the speed of an object at one instant of time
Force - answer A push or pull on a object
net force - answer The combination of all forces acting on an object
constant speed - answer Speed that does not change
instantaneous speed - answer the speed of an object at one instant of time
average speed - answer total distance divided by total time
Newton's first law ( Aka Law of Inertia) - 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 - 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 - 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 - 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 - answera turning or twisting force. Represented by T
Formula: T=Fd
mechanical advantage - answerthe ratio of the force that performs the useful work of a
machine to the force that is applied to the machine. the number of times a machine
increases a force exerted on it
work input - answerWork input is the amount of energy supplied to the machine.
Example- The work done to hold the sugar piece by sugar tongs is the work input. Work
input may be defined as the product of the effort force applied to a machine and the
distance through which the force is applied. Work input is given to the machine to get
desired work.
work output - answerIn physics, work output is the work done by a simple machine,
compound machine, or any type of engine model.
direct current - answeran electric current that flows in one direction steadily
alternating current - answerA flow of electric charge that regularly reverses its direction.
Electrical potential difference - answerThe change in potential energy per unit charge in
an electric field ( also known as voltage)
Resistance - answerA material's opposition to the flow of electric current.
Power - answerthe rate at which work is done
Electromagnet - answera coil that has a soft iron core and that acts as a magnet when
an electric current is in the coil
Magnetic field - answerThe area of magnetic force around a magnet
motor principle - answera current-carrying conductor that cuts across external magnetic
field lines experiences a force perpendicular to both the magnetic field and the direction
of the electric current
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