# All GCSE physics equations

TLDRIn this informative video, Mr. Wilby outlines essential physics equations for exams, emphasizing the importance of memorizing them to better understand and apply them in various contexts. The key equations covered include speed, acceleration, force, efficiency, momentum, density, work done, kinetic energy, power, energy transfer, charge, voltage, electrical power, and pressure. This comprehensive guide aims to help students become familiar with these fundamental principles, ensuring they can select the appropriate equations for different problems.

###### Takeaways

- π Mr. Wilby is providing a list of essential physics equations for exam preparation.
- π’ The first equation is for speed: Speed = Distance / Time.
- π The second equation defines acceleration: Acceleration = Change in Velocity / Time Taken.
- βοΈ Newton's second law is introduced with the equation: Force = Mass Γ Acceleration.
- π The equation for gravitational potential energy is given as: Gravitational Potential Energy = Mass Γ Gravity.
- π‘ Efficiency is explained with the formula: Efficiency = Useful Energy Transferred / Total Energy Supplied.
- ποΈ Momentum is calculated using: Momentum = Mass Γ Velocity.
- π΅ The relationship between speed, frequency, and wavelength is described with: Speed = Frequency Γ Wavelength.
- π Density is defined by the formula: Density = Mass / Volume.
- π¨ Work done is related to force and distance: Work Done = Force Γ Distance Moved in the Direction of the Force.
- β‘ Electrical concepts are covered, including Ohm's law: Voltage = Current Γ Resistance.
- π Electrical power is discussed in two ways: Power = Work Done / Time Taken and Power = Energy Transferred / Time Taken.

###### Q & A

### What is the formula for calculating speed?

-Speed is calculated using the formula: speed = distance / time.

### How do you determine acceleration according to Newton's laws?

-Acceleration is determined by the change in velocity divided by the time taken before the change.

### What is Newton's second law of motion?

-Newton's second law of motion states that force equals mass times acceleration (F = ma).

### What is the formula for calculating work done?

-Work done is calculated as the force times the distance moved in the direction of the force (W = F Γ d).

### How is kinetic energy defined in physics?

-Kinetic energy is defined as one-half times the mass times the velocity squared (KE = 1/2 Γ m Γ v^2).

### What is the relationship between power and work done?

-Power is the rate at which work is done, calculated as work done divided by the time taken (P = W/t).

### What is the formula for calculating the efficiency of a device?

-Efficiency is the ratio of useful energy transferred by the device to the total energy supplied to the device (Efficiency = Useful energy / Total energy).

### How do you calculate the momentum of an object?

-Momentum is calculated as the mass times the velocity of the object (p = m Γ v).

### What is the formula for Ohm's law?

-Ohm's law states that voltage equals current times resistance (V = I Γ R).

### What is the formula for calculating the spring force in Hooke's law?

-In Hooke's law, the spring force is equal to the spring constant times the extension (F = k Γ x).

### How is pressure defined in physics?

-Pressure is defined as the force perpendicular to the surface divided by the area of the surface (P = F/A).

###### Outlines

##### π Physics Exam Equations Overview

Mr. Wilby introduces a comprehensive list of essential physics equations for exams. He emphasizes the importance of memorization for familiarity and quick application. The equations cover a range of topics including speed, acceleration, Newton's laws, efficiency, momentum, wave properties, density, work, gravitational potential energy, kinetic energy, power, energy transfer, electrical concepts like Ohm's law, and spring mechanics. This summary serves as a quick reference for students preparing for their physics exams.

###### Mindmap

###### Keywords

##### π‘Speed

##### π‘Acceleration

##### π‘Force

##### π‘Newton's Second Law

##### π‘Efficiency

##### π‘Momentum

##### π‘Frequency and Wavelength

##### π‘Density

##### π‘Work Done

##### π‘Gravitational Potential Energy

##### π‘Kinetic Energy

##### π‘Power

##### π‘Electrical Power

##### π‘Spring Constant

##### π‘Moment of Force

##### π‘Pressure

###### Highlights

Speed is defined as distance divided by time.

Acceleration is the change in velocity divided by the time taken before the change.

Newton's second law states that force equals mass times acceleration.

Formulation of gravitational potential energy as mass times gravity.

Efficiency is calculated as useful energy transferred divided by total energy supplied.

Momentum is the product of mass and velocity.

The relationship between speed, frequency, and wavelength in wave physics.

Density is mass divided by volume.

Work done is the product of force and distance moved in the direction of the force.

Change in gravitational potential energy is mass times gravity times change in vertical height.

Kinetic energy is half the product of mass and the square of velocity.

Power is work done divided by the time taken, or energy transferred divided by time taken.

Energy transferred is equal to charge times voltage.

Charge is the product of current and time.

Ohm's law is expressed as voltage equals current times resistance.

Electrical power is the product of current and voltage.

Another form of electrical power is current squared times resistance.

Spring force is the spring constant times extension.

Moment of force is the product of force and the distance moved perpendicular to the force.

Pressure is force perpendicular to the surface divided by the area of the surface.

###### Transcripts

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