What is Physics Im a beginner and have a test need help

Please explain and list fundamental quantities and deveried quanties like acceleration monmemtum area density and power im a beginner please help i have a test

acceleration = (final velocity - initial velocity) / time
momentum = mass * velocity
density = mass/volume
power = current * voltage
voltage =current * resistance
speed = distance/time
moment = force * distance
kinetic energy = 1/2 * mass * velocity^2
pressure = force/area
pressure difference = height * density * force due to gravity
gravitational potential energy = mass * height * force due to gravity
work done = force * distance
charge = current * time

Hi! I have an exam coming up that includes physics. So far in class we've learnt about motion, deceleration, distance, displacement, velocity, time, acclelration, shapes of graphs,Newtons Laws (1st, 2nd and 3rd) and energy. I am hopeless at all of these, I just find the really hard and confusing. it would be splendid if someone can explain them to me.

acceleration = (final velocity - initial velocity) / time

momentum = mass * velocity

density = mass/volume

power = current * voltage

voltage =current * resistance

speed = distance/time

moment = force * distance

kinetic energy = 1/2 * mass * velocity^2

pressure = force/area

pressure difference = height * density * force due to gravity

gravitational potential energy = mass * height * force due to gravity

work done = force * distance

charge = current * time

Hi! I have an exam coming up that includes physics. So far in class we've learnt about motion, deceleration, distance, displacement, velocity, time, acclelration, shapes of graphs,Newtons Laws (1st, 2nd and 3rd) and energy. I am hopeless at all of these, I just find the really hard and confusing. it would be splendid if someone can explain them to me.

Thanks,

Sarah