Questions and Answers
What is the formula for Kinetic Energy?
Kinetic energy = 0.5 x mass x (speed) squared
What is the formula for Gravitational Potential Energy (GPE)?
GPE = m x gravitational field strength x height
What does the formula Power = work done (energy) / time represent?
Power = work done / time
How is efficiency calculated?
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What is the formula for Charge Flow?
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What is the equation for Potential Difference?
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How do you calculate Total Resistance?
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What is the formula for Power (with potential difference)?
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What is the formula for Power (with resistance)?
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What does Energy Transferred equal?
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Calculate Energy Transferred (with charge flow).
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What is the formula for Density?
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What is the equation for Weight?
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Calculate Work Done.
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What is the formula for Force?
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What is the equation for Moments of a Force?
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Calculate Moment.
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What is the formula for Resultant Force?
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How do you calculate Pressure?
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What is the formula for Acceleration?
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What is the relationship between pressure and volume in gases?
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Study Notes
Energy
- Kinetic energy formula: KE = 0.5 x mass x (speed)²
- Gravitational potential energy (GPE) formula: GPE = mass x gravitational field strength x height
- Power defined as work done (energy) over time: Power = work done / time
- Efficiency calculated by the ratio of output to input, multiplied by 100: Efficiency = (output/input) x 100
Electricity
- Charge flow expressed as the product of current and time: Charge flow = current x time
- Potential difference (voltage) calculated using: Potential difference = current x resistance
- Total resistance in a series circuit is the sum of individual resistances: Total resistance = Resistance1 + Resistance2
- Power using potential difference denoted by: Power = current x potential difference
- Alternative power formula involving resistance: Power = resistance x (current)²
- Energy transferred relates to power and time: Energy transferred = power x time
- Energy transferred can also be calculated with charge flow: Energy transferred = charge flow x resistance
Particle Model of Matter
- Density defined by the equation: Density = mass / volume
Forces
- Weight calculation given by: Weight = mass x gravitational field strength
- Work done determined through the formula: Work done = force x distance
- Force related to spring properties: Force = spring constant x extension
- Moment of a force equation: Moment of a force = force x distance
- General moment defined by: Moment = mass x volume
- Resultant force calculated as: Resultant force = mass x acceleration
- Pressure calculated by the formula: Pressure = force normal to a surface / area of the surface
- Acceleration defined through change in velocity over time: Acceleration = (final velocity - initial velocity) / time taken
- Pressure in gases follows the relationship: Constant = pressure x volume
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Description
This quiz encompasses essential physics equations related to energy, including kinetic energy, gravitational potential energy, power, and efficiency. It is designed to help students prepare for GCSE examinations by reinforcing their understanding of these critical concepts.
