forces and motion
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Questions and Answers

How do you convert speed from m/s to km/s?

Multiply by 3.6.

What does the formula for calculating average speed entail?

Average speed is calculated by total distance divided by total time.

Define acceleration in terms of speed changes.

Acceleration is the rate of change in speed over time.

What is Newton's third law of motion?

<p>For every action, there is an equal and opposite reaction.</p> Signup and view all the answers

How is weight calculated using mass and gravity?

<p>Weight is calculated by multiplying mass by gravity: weight = mass x gravity.</p> Signup and view all the answers

What is work and how is it calculated?

<p>Work is the amount of energy used to move an object, calculated by force x distance.</p> Signup and view all the answers

What are the active forms of energy?

<p>Active forms of energy include heat, kinetic, light, sound, electric, and electromagnetic.</p> Signup and view all the answers

What does the law of conservation of energy state?

<p>Energy cannot be created or destroyed, only transformed into different forms.</p> Signup and view all the answers

Flashcards

Converting m/s to km/s

Multiply by 3.6

Calculating Speed

Speed = Distance / Time

Average Speed

Total Distance / Total Time

Calculating Gradient

Gradient = Rise (Distance) / Run (Time)

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Velocity

Speed and Direction

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Acceleration

Change in Velocity (m/s) over Time (s)

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Force

Push, Pull, or Twist

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Contact Forces

Friction, Air Resistance, Water resistance

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Non-Contact Forces

Gravity, Electrostatic, Magnetic

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Newton's Third Law

For every action, there is an equal and opposite reaction.

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Unit of Force

Newtons (N)

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Unit of Mass

Kilograms (kg)

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Mass

Amount of Matter

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Weight

Force of Gravity on an Object

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Unit of Weight

Newtons (N)

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Calculating Weight

Weight = Mass x Gravity

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Earth's Gravity

Approximately 10 N/kg

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Magnitude

Size or Strength of a Force

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Direction

The Path or Way a force is acting

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Law of Conservation of Energy

Energy cannot be created or destroyed, only transformed.

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Calculating Force

Force = Mass x Acceleration

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Unit of Work

Joules (J) or Kilojoules (kJ)

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Energy Use

Moves or changes objects

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Unit of Energy

Joules (J) or Kilojoules (kJ)

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Active Forms of Energy

Heat, Kinetic, Light, Sound, Electrical, Electromagnetic

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Potential Forms of Energy

Chemical, Gravitational, Magnetic, Nuclear, Elastic, Mechanical

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Work

Energy used to move an object

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Unit of Power

Watts (W) or Joules/second (J/s)

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Calculating Work

Work = Force x Distance

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Power

Rate of doing work.

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