Physics Equations Quiz

Equations

• s = d/t: Solving for speed, where s = speed, d = distance, and t = time.
• v = Δx/Δt: Solving for velocity, where v = velocity, Δx = change in position, and Δt = change in time.
• a = Δv/Δt: Solving for acceleration, where a = acceleration, Δv = change in velocity, and Δt = change in time.
• vf = vi + at: Solving for final velocity, where vf = final velocity, vi = initial velocity, a = acceleration, and t = time.
• vf² = vi² + 2ad: Solving for final velocity, where vf = final velocity, vi = initial velocity, a = acceleration, and d = displacement.
• d = vit + 1/2 at²: Solving for distance, where d = distance, vi = initial velocity, a = acceleration, and t = time.
• F = mg: Solving for the force of gravity, where F = force, m = mass, and g = acceleration due to gravity (approximately 10 N/kg).
• Fnet = Fa - Ff: Solving for net force, where Fnet = net force, Fa = applied force, and Ff = frictional force.
• Fnet = ma: Solving for net force, where Fnet = net force, m = mass, and a = acceleration.
• Ff = µFn: Solving for frictional force, where Ff = frictional force, µ = coefficient of friction, and Fn = normal force.
• F = Gmm²/r²: Solving for gravitational force, where F = gravitational force, G = gravitational constant, m₁ and m₂ = masses of objects, and r = distance between the objects.
• PEg = mgh: Solving for gravitational potential energy, where PEg = gravitational potential energy, m = mass, g = acceleration due to gravity, and h = height.
• ΔPEe = 1/2 kΔx²: Solving for elastic potential energy, where ΔPEe = elastic potential energy, k = spring constant, and Δx = change in length.
• KE = 1/2 mv²: Solving for kinetic energy, where KE = kinetic energy, m = mass, and v = velocity.
• ME = PEg + PEs + KE: Solving for mechanical energy, where ME = mechanical energy, PEg = gravitational potential energy, PEs = elastic potential energy, and KE = kinetic energy.
• W = ΔE = Fd: Solving for work, where W = work, ΔE = change in energy, F = force, and d = distance.
• P = W/t: Solving for power, where P = power, W = work, and t = time.
• p = mv: Solving for momentum, where p = momentum, m = mass, and v = velocity.
• Ap = FΔt: Solving for impulse, where Ap = change in momentum, F = average force, and Δt = change in time.

Unit 5 - Momentum

• Momentum is the measure of an object's motion and is related to its mass and velocity.
• Momentum is a vector quantity. Momentum has a direction.
• Momentum is conserved in all collisions, elastic and inelastic.
• In an elastic collision, both momentum and kinetic energy are conserved before and after.
• In an inelastic collision, momentum is conserved, but kinetic energy is not.

Unit 4 - Energy

• Energy is the ability to do work or cause change.
• There are many different forms of energy: chemical, mechanical, nuclear, gravitational, light, radiant, sound, thermal, and electrical.
• Mechanical energy is the sum of potential and kinetic energy.
• Gravitational potential energy is stored energy due to an object's height.
• Elastic potential energy is stored energy in a stretched or compressed object.
• Kinetic energy is the energy of motion.
• Work is the transfer or change of energy, measured in joules.
• Power is the rate at which work is done, measured in watts.

Unit 3 - 2D Motion and Free Fall

• In two-dimensional motion, objects move along both the x and y axes simultaneously.
• In free fall, objects experience constant acceleration due to gravity (approximately 9.8 m/s² downwards).
• The motion of an object in two dimensions can be analyzed by separating the motion into horizontal and vertical components.
• The velocity components along the x and y axes may change independently.

Unit 2 - Forces

• Force is a push or pull, with magnitude, and direction.
• There are different types of forces: Contact forces (e.g., applied, tension, normal, friction) and Field forces (e.g., gravitational, electric, magnetic).
• Force diagrams (free-body diagrams) illustrate all forces acting on an object.
• Equilibrium occurs when the net force on an object is zero.

Unit 1 - Conversions and Kinematics

• Understanding unit conversion is important.
• Distance is a scalar quantity, and displacement is a vector quantity.
• Velocity is a vector quantity (direction and magnitude) and speed is a scalar quantity.
• Acceleration is a vector quantity (direction and magnitude).

Universal Law of Gravitation

• Every object in the universe attracts every other object with a gravitational force.
• The force is proportional to the product of the masses of the two objects and is inversely proportional to the square of the distance between them.