Speed, Velocity, and Motion
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Questions and Answers

The two main types of energy are ______ and ______.

kinetic, potential

Motion is when an object changes in ______ or ______ joining the ______ to the ______.

position, time, beginning, changes

What does uniform motion mean?

Uniform motion means an object is at a constant speed in a straight line.

Uniform motion is difficult to maintain. Because its ______ is normally used.

<p>average speed</p> Signup and view all the answers

The ______ of a line can tell you something about the ______ of the object.

<p>slope, motion</p> Signup and view all the answers

Scalar means ______.

<p>magnitude</p> Signup and view all the answers

Vector means ______ and ______.

<p>magnitude, direction</p> Signup and view all the answers

Velocity has ______ and ______.

<p>speed, direction</p> Signup and view all the answers

Displacement is ______ with ______.

<p>distance, direction</p> Signup and view all the answers

What are two methods to identify vectors?

<p>The two methods to identify vectors are the component method and the graphical method.</p> Signup and view all the answers

What does the component method use?

<p>The component method uses right, left, up, and down.</p> Signup and view all the answers

What does the graphical method use?

<p>The graphical method uses north, east, south, and west.</p> Signup and view all the answers

Acceleration is the change in ______ during ______ seconds.

<p>velocity, certain</p> Signup and view all the answers

Force is a ______ or ______ on an object measured in ______ etc.

<p>push, pull, newtons</p> Signup and view all the answers

What can forces be?

<p>Forces can be balanced or unbalanced.</p> Signup and view all the answers

What can an unbalanced force on an object do?

<p>An unbalanced force on an object can either speed it up or slow it down.</p> Signup and view all the answers

Work is done whenever a ______ moves an object through a ______.

<p>force, distance</p> Signup and view all the answers

State at least two of the conditions for work

<p>There must be a force applied. There msut be a displacement. The force and the displacement must be the same.</p> Signup and view all the answers

Energy is the ability to ______.

<p>do work</p> Signup and view all the answers

Energy and work are essentially the same thing.

<p>True (A)</p> Signup and view all the answers

Flashcards

Forms of energy

The two main types of energy are kinetic and potential.

Kinetic energy

Energy of an object in motion.

Potential energy

Energy stored in an object due to its position.

Motion

Change in position of an object relative to a reference point.

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Uniform motion

Motion at a constant speed in a straight line.

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Average speed

Total distance traveled divided by the total time taken.

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Speed (symbol)

The symbol for speed is 'V'.

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Distance

Scalar quantity representing the total movement of an object.

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Displacement

Vector quantity measuring shortest path from start to end including direction.

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Velocity

Speed with a specified direction.

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Scalar quantity

A quantity that has only magnitude, like speed.

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Vector quantity

A quantity that has both magnitude and direction, like velocity.

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Acceleration

The change in velocity over a specific time period.

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Force

A push or pull acting on an object, measured in Newtons (N).

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Work

Work is done when a force moves an object through a distance.

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Conditions for work

Movement, force, and same direction of force and distance are required.

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Energy

The ability to do work.

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Newton

Unit of force in the metric system.

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Mechanical energy

Total potential and kinetic energy in a system.

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Gravitational energy

Potential energy related to an object's height in a gravitational field.

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Elastic energy

Potential energy stored in elastic materials when stretched or compressed.

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Chemical energy

Energy stored in the bonds of chemical compounds.

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Nuclear energy

Energy released during nuclear fission or fusion.

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Thermal energy

Energy related to the temperature of an object; heat energy.

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Sound energy

Vibrations that travel through air or another medium as sound.

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Radiant energy

Energy of electromagnetic waves, such as light.

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Friction

A force that opposes motion between two surfaces in contact.

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Unbalanced force

A force that causes a change in the motion of an object.

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Study Notes

1- Speed

  • Forms of Energy: Two main types of energy exist.
  • Motion: Motion occurs when an object changes position or direction.
  • Uniform Motion: An object in uniform motion moves at a constant speed in a straight line. This is typically used because it's easier to understand.
  • Average Speed Formula: Average speed = (total distance)/(total time)
  • Slope: The slope of a distance-time graph represents average speed. The slope is calculated by taking the rise over the run.

2- Velocity

  • Scalars and Vectors: Scalars have magnitude only (e.g., speed, distance ); vectors have both magnitude and direction (e.g., velocity, displacement).
  • Speed: Speed is the rate at which an object covers distance (magnitude only)
  • Distance: The total ground covered during an entire journey (scalar)
  • Velocity: Velocity is the rate of change of displacement (magnitude and direction).
  • Displacement: The change in position from the starting point to the ending point (vectorquantity showing magnitude and direction).
  • Identifying Vectors: Two methods can be used to identify vectors: direction, or using a coordinate system (north, south, east, west, up, down, left, right).

3- Acceleration

  • Acceleration: Acceleration is the rate of change in velocity over time.
  • Acceleration Formula: Acceleration (a) = change in velocity (Δv) / change in time (Δt)

4- Work

  • Force: Force is a push or pull on an object.
  • Work: Work is done when a force causes an object to move. Work = Force x Distance.
  • Conditions for Work: Work is only done when a force acts in the direction of motion and the object is moving or changing position.

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Related Documents

Science 10 PDF

Description

Explore the concepts of speed, velocity, and motion, including uniform motion and average speed calculations. Understand the difference between scalar and vector quantities, focusing on distance, displacement and their rates of change.

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