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Gravity is the force that attracts mass toward the center of the Earth. That is the way most people know it as, however gravity exists between every mass and all objects are pulling on one another with varying strengths based on their mass and distance from one another.

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Gravity pulls at 9.8m/s^2 which means if you put a JennAir Pro-Style 42 Inch Wide 25.02 Cu. Ft. Energy Star Rated Built-In Side by Side Refrigerator 15m high and drop it, it would take 1.749 seconds because 9.8m*1.749^2 = 15m

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Speed at which things fall in gravity on Earth = 9.8m/s^2
Universal Gravity Equation =
F = Gm₁m₂/r2

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Gravity is used to find speed at which things fall, but other than that it is almost only used when trying to find the force needed to overcome it when engineering airplanes, helicopters, and spaceships.

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Velocity is distance over time with direction. Speed is only D/T, but velocity is most commonly used and is most often used in miles per hour on the roads for dictating speed limit.

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Jimothy Ran 360 miles North in 15 minutes. How fast was he going?
The answer is 1440mph North because 15mins * 4 = 1 hr and 360 *4 = 1440; 1440miles / 1hr = 1440m/h North

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Velocity equation( make sure to include direction)
D/T = V
Acceleration is change in velocity over time
A= change in V / Change in T
Final Velocity
V=Vo +at

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Velocity is most often used when driving in order to stay within the speed limit, but it is also used in airplanes, helicopters, rockets, and any flying craft in order to ensure its velocity will over come Gravity.

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Force is the an interaction that will change the motion of an object. There are three main laws of motion (force).  1: 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. 2: the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.
3: For every action, there is an equal and opposite reaction.

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Johnsathoniel pushed a 20kg box at 10m/s^2. What was the Force applied? The force applied was 200N because 20 * 10 = 200 and force is measured in Newtons (N)

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F = M*A

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Force is used to calculate how much force is needed in order to overcome gravity, push and lift heavy objects in construction, countering friction, and many countless other applications.

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Energy is a property that is transferred between bodies in order to apply work. Energy cannot be destroyed or created. Energy is only transferred. The different types of energies include thermal energy, radiant energy, chemical energy, nuclear energy, electrical energy, motion energy, sound energy, elastic energy and gravitational energy.

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A 50kg boy and his 100kg father are jogging both at 5m/s. Which one has more kinetic energy?
The father does. We find this by first getting the kinetic equation and applying it to both
( Ke = 1/2 *M*v^2)
(Boy)1/2*50*5^2 = 625J
(Dad)1/2*100*5^2= 1250 J
The Dad has more Kinetic Energy.

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Kinetic energy equation
KE = 1/2 × m × v2
Gravitational Potential energy
GPE = mgh
Efficiency (%) = (useful energy out ÷ total energy in) x 100
Work = Force * Displacement

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Energy is used in every single household across the United States alone and is used to power lights, televisions, ovens, microwaves, and everything else that we need to have plugged into an outlet. Energy is often converted from dangerous forms into usable forms for the common household.

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Momentum is the product of mass and velocity in an object ( P =MV). The velocity on the equation creates a direction meaning this is a vector quantity that requires a direction.

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A 50kg boy and his 100kg father are jogging both at 5m/s. Which one has more momentum?
The father does.
( P=MV)
(boy) 50kg*5m/s = 250kgm
(dad) 100kg*5m/s =500kgm
The dad has more.

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Momentum
P=MV
Impulse = Change in momentum over time
Conservation of momentum
m ₁ • v ₁ + m ₂ • v ₂ = m ₁ • v ₁' + m ₂ • v 2
Torque = rF sin0

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Momentum is mostly used when trying to solve how much momentum an object has and how to stop it. For example car brakes are extremely important and are vital to our day to day lives. Without brakes being able to stop the momentum of our cars we would all be in great danger going on the roads.