Physics Chapter on Forces and Motion
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Questions and Answers

A frictional force can prevent slipping from walking.

True (A)

When a spring is hanging with masses on it, the larger the force, the greater the stretch.

True (A)

A Force is either a [blank] or a [blank].

push, pull

A force can change the speed, direction, or shape/size of a moving object.

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

A skydiver falls toward the Earth due to [blank] and [blank].

<p>gravity, air drag</p> Signup and view all the answers

Where will the object move based on the diagram?

<p>Up and right (B)</p> Signup and view all the answers

If an airplane travels at constant speed, and when it meets turbulence, it causes it to take a different route and change its direction. This is an example of balanced forces.

<p>False (B)</p> Signup and view all the answers

Any object, after traveling a certain distance and returning to the starting point, will have ZERO displacement.

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

A book on a table does not move because the forces of the table pushing up and the gravity pulling down are balanced.

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

The resultant force can be calculated by subtracting the two given forces where the direction would be from the smaller force.

<p>False (B)</p> Signup and view all the answers

A baseball that has been thrown to home place is an example of unbalanced force.

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

A distance can be calculated by adding all the distances being covered by any moving object. The SI unit for distance is [blank].

<p>Meter (B)</p> Signup and view all the answers

Velocity, acceleration, and displacement are all vectors.

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

Distance and time are the two measurements necessary for calculating speed.

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

Velocity is different from speed because velocity only measures speed.

<p>False (B)</p> Signup and view all the answers

On a distance vs. time graph, the steeper the slope, the faster the speed.

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

The relationship between velocity and speed in motion along a straight line is that velocity equals speed in motion along a straight line.

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

The moon orbits the Earth in 28 days at a constant speed and changes its direction.

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

A distance vs. time graph shows an object's [blank].

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

The line above moving to the right direction and is positive.

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

Particles, when heated, speed up.

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

Heat flows from [blank] to [blank].

<p>hot, cold</p> Signup and view all the answers

When warm air rises and cool air sinks, this is called [blank].

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

A group of friends gathered around a fire to stay warm is an example of [blank].

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

A lizard sitting on a rock to get warm is an example of [blank].

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

Your feet touching hot sand is an example of [blank].

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

As particles are exposed to colder temperatures, they speed up.

<p>False (B)</p> Signup and view all the answers

An inflated balloon, when placed in a refrigerator, would cause the particles to move slower and become closer together.

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

Adding heat to matter causes its particles to move faster and farther apart.

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

While rubbing your hands together on a cold day, you use friction to transform mechanical energy to [blank].

<p>thermal energy</p> Signup and view all the answers

In a car's internal combustion engine system, most of the chemical energy from the fuel is transformed into thermal energy. The thermal eneryg causes which of the follwing?

<p>All of the above (D)</p> Signup and view all the answers

What is the short story mostly about?

<p>About how the force works (B)</p> Signup and view all the answers

When force is exerted on one side of an object, it causes the object to move.

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

The same amount of force on all sides causes no motion.

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

Force causes an object to move.

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

Flashcards

Frictional Force

A force that prevents slipping during motion.

Spring Stretch

The greater the force, the more a spring stretches.

Definition of Force

A push or pull that can change an object's movement.

Effect of Force

Force can change speed, direction, or shape of an object.

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Skydiving Forces

Skydivers experience gravity and air drag during freefall.

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Zero Displacement

An object returns to its starting point has zero displacement.

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Balanced Forces

When forces are equal, an object remains at rest or moves at constant speed.

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Resultant Force

Calculated by subtracting two forces; direction is from the greater force.

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Unbalanced Force

Causes a change in motion even if speed is constant.

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Velocity vs Speed

Velocity includes direction; speed does not.

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Distance Measurement

Total distance is calculated by adding all distances traveled.

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SI Unit for Displacement

The standard unit for measuring displacement is a meter.

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Vectors

Includes velocity, acceleration, and displacement.

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Distance vs Time Graph

A graph that shows an object's speed over time.

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Convection

Warm air rises and cool air sinks.

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Radiation

Transfer of heat from a fire to nearby objects.

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Conduction

Heat transfer through contact between materials.

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Effect of Heating

Particles move faster and spread apart when heated.

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Energy Transformation

Forces causing an object to move transform energy types.

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Chemical Energy in Engines

Fuel energy transforms into thermal energy and mechanical energy.

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Movement Example

An example of unbalanced force is a thrown baseball.

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Effects of Force Application

Exerting force on one side of an object can cause movement.

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No Motion

The same amount of force on all sides causes no motion.

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Temperature Effects

Particles slow down at colder temperatures.

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Inflated Balloon

Placing it in the refrigerator makes particles slow and closer.

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Heat Flow

Heat travels from hot objects to cold ones.

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Study Notes

Friction and Motion

  • Friction prevents slipping during walking.
  • Larger forces stretch springs more.
  • Forces can change speed, direction, or shape of objects.
  • Skydiver falls due to gravity and air drag.
  • Forces can be pushes or pulls

Free-body Diagrams

  • Free-body diagrams show forces acting on an object.
  • Forces like gravity and normal force can be represented on a diagram.

Airplane Motion and Displacement

  • Constant speed in an airplane can change direction when encountering turbulence.
  • Displacement is zero for an object that returns to its starting point, post travelling a certain distance.

Balanced and Unbalanced Forces

  • Balanced forces (like gravity and the table holding a book) prevent motion.
  • Unbalanced forces (like throwing a baseball) cause motion.
  • Resultant forces are found by subtracting forces if they are in opposite directions.

Calculating Displacement and Velocity

  • Displacement is the change in position.
  • The SI unit for displacement is meters.
  • Velocity is a vector with speed and direction.
  • Distance can be calculated by adding the covered distances.

Speed and Graphs

  • Steeper slopes on distance-time graphs indicate faster speeds.
  • Velocity is equal to speed when motion is along a straight line.
  • The moon orbits Earth at a constant speed, changing direction.
  • Distance-time graphs show objects' speeds.

Temperature and Particle Motion

  • Heat flows from hotter to cooler objects.
  • Conduction, convection, and radiation are heat transfer methods.
  • Particles speed up when heated.
  • Particles slow down when cooled.

Energy Transformations

  • Heat can cause particles to move farther apart.
  • Friction converts mechanical energy to thermal energy.
  • Chemical energy in fuel is changed into thermal energy in a car engine.
  • Thermal energy causes engine parts to move.

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Description

Test your understanding of forces, motion, and their effects on various objects. This quiz covers topics such as friction, free-body diagrams, displacement, and balanced versus unbalanced forces. Challenge yourself and see how well you grasp these fundamental concepts of physics.

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