Question1. Describe the energy transformations occurring in each of the following situations: $\square$ (a) A ball falls from the top of a building. (b) An archer pulls a bow back and releases the arrow. (c) A firework explodes. (d) An incandescent light bulb comes on. (e) A gasoline lawnmower cuts the lawn.

Studdy Solution

STEP 1

1. Energy can be transformed from one form to another.
2. Each situation involves a specific sequence of energy transformations.
3. We need to identify and describe the energy transformations for each situation.

STEP 2

1. Analyze the energy transformations for a falling ball.
2. Analyze the energy transformations for an archer and arrow.
3. Analyze the energy transformations for a firework explosion.
4. Analyze the energy transformations for an incandescent light bulb.
5. Analyze the energy transformations for a gasoline lawnmower.

STEP 3

For a ball falling from the top of a building: - Initially, the ball has gravitational potential energy due to its height. - As the ball falls, gravitational potential energy is converted into kinetic energy. - Just before impact, most of the energy is kinetic energy.

STEP 4

For an archer pulling a bow back and releasing the arrow: - When the bow is drawn, mechanical energy is stored as elastic potential energy in the bow. - Upon release, the elastic potential energy is converted into kinetic energy of the arrow. - The arrow gains kinetic energy as it moves towards the target.

STEP 5

For a firework exploding: - Initially, the firework contains chemical potential energy. - Upon ignition, the chemical potential energy is transformed into thermal energy, light energy, and sound energy. - The explosion results in a rapid release of these forms of energy.

STEP 6

For an incandescent light bulb coming on: - Electrical energy is supplied to the bulb. - Electrical energy is converted into thermal energy, heating the filament. - The heated filament emits light energy (and some thermal energy).

STEP 7

For a gasoline lawnmower cutting the lawn: - Chemical potential energy in the gasoline is converted into thermal energy through combustion. - Thermal energy is converted into mechanical energy to power the engine. - Mechanical energy is used to rotate the blades and cut the grass.

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Studdy Solution

STEP 1

1. Energy can be transformed from one form to another.
2. Each situation involves a specific sequence of energy transformations.
3. We need to identify and describe the energy transformations for each situation.

STEP 2

STEP 3

For a ball falling from the top of a building: - Initially, the ball has gravitational potential energy due to its height. - As the ball falls, gravitational potential energy is converted into kinetic energy. - Just before impact, most of the energy is kinetic energy.

STEP 4

STEP 5

For a firework exploding: - Initially, the firework contains chemical potential energy. - Upon ignition, the chemical potential energy is transformed into thermal energy, light energy, and sound energy. - The explosion results in a rapid release of these forms of energy.

STEP 6

For an incandescent light bulb coming on: - Electrical energy is supplied to the bulb. - Electrical energy is converted into thermal energy, heating the filament. - The heated filament emits light energy (and some thermal energy).

STEP 7

For a gasoline lawnmower cutting the lawn: - Chemical potential energy in the gasoline is converted into thermal energy through combustion. - Thermal energy is converted into mechanical energy to power the engine. - Mechanical energy is used to rotate the blades and cut the grass.

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Studdy Solution

STEP 1

1. Energy can be transformed from one form to another.2. Each situation involves a specific sequence of energy transformations.3. We need to identify and describe the energy transformations for each situation.

STEP 2

STEP 3

For a ball falling from the top of a building: - Initially, the ball has gravitational potential energy due to its height. - As the ball falls, gravitational potential energy is converted into kinetic energy. - Just before impact, most of the energy is kinetic energy.

STEP 4

STEP 5

For a firework exploding: - Initially, the firework contains chemical potential energy. - Upon ignition, the chemical potential energy is transformed into thermal energy, light energy, and sound energy. - The explosion results in a rapid release of these forms of energy.

STEP 6

For an incandescent light bulb coming on: - Electrical energy is supplied to the bulb. - Electrical energy is converted into thermal energy, heating the filament. - The heated filament emits light energy (and some thermal energy).

STEP 7

For a gasoline lawnmower cutting the lawn: - Chemical potential energy in the gasoline is converted into thermal energy through combustion. - Thermal energy is converted into mechanical energy to power the engine. - Mechanical energy is used to rotate the blades and cut the grass.

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Start learning now

Download Studdy AI Tutor now. Learn with ease and get all help you need to be successful at school.

1. Energy can be transformed from one form to another.
2. Each situation involves a specific sequence of energy transformations.
3. We need to identify and describe the energy transformations for each situation.