Quiz Sur LA Physique Pour Des élèves De Secondaire 4

1. La loi de la conservation de l'énergie dit que l'énergie ne peut être créé ni détruit, elle peut seulement être transformée ou transférée.

Vrai

Faux

« Rien ne se perd, rien ne se crée, tout se transforme ! ».

Explanation

« Rien ne se perd, rien ne se crée, tout se transforme ! ».

2. C'est quoi le type d'énergie à chaque point?

Potentielle-Cinétique-Potentielle

Cinétique-Potentielle-Potentielle

Potentielle-Potentielle-Potentielle

Cinétique-Potentielle-Potentielle

The correct answer is Potentielle-Cinétique-Potentielle. This sequence represents the energy transformation at each point. Potentielle energy refers to the potential energy stored in an object due to its position or configuration. Cinétique energy is the energy of motion. The sequence Potentielle-Cinétique-Potentielle indicates that the energy starts as potential energy, then converts to kinetic energy, and finally converts back to potential energy.

Explanation

The correct answer is Potentielle-Cinétique-Potentielle. This sequence represents the energy transformation at each point. Potentielle energy refers to the potential energy stored in an object due to its position or configuration. Cinétique energy is the energy of motion. The sequence Potentielle-Cinétique-Potentielle indicates that the energy starts as potential energy, then converts to kinetic energy, and finally converts back to potential energy.

3. Dans le formule pour l'énergie cinétique [ Ek = 1/2mv^2 ] le v représente

The correct answer is "la vitesse". In the formula for kinetic energy [Ek = 1/2mv^2], the variable "v" represents velocity or speed.

Explanation

The correct answer is "la vitesse". In the formula for kinetic energy [Ek = 1/2mv^2], the variable "v" represents velocity or speed.

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4. C'est quoi la constante gravitationnelle de la Terre?

8.87 N/kg

8.91 N/kg

1.62 N/kg

0.0012 N/kg

The correct answer is 8.91 N/kg. The question is asking for the gravitational constant of the Earth. The gravitational constant is a measure of the strength of the gravitational force between two objects. On Earth, this constant is approximately 9.81 N/kg. Therefore, the closest answer to this value is 8.91 N/kg, making it the correct answer.

Explanation

The correct answer is 8.91 N/kg. The question is asking for the gravitational constant of the Earth. The gravitational constant is a measure of the strength of the gravitational force between two objects. On Earth, this constant is approximately 9.81 N/kg. Therefore, the closest answer to this value is 8.91 N/kg, making it the correct answer.

5. La travail se mesure en W= F x D (W= travail, F= force, D= distance)

Vrai

Faux

The statement is true because the formula W = F x D is the correct formula for measuring work. In this formula, W represents work, F represents force, and D represents distance. This formula indicates that work is equal to the product of force and distance. Therefore, the statement is correct.

Explanation

The statement is true because the formula W = F x D is the correct formula for measuring work. In this formula, W represents work, F represents force, and D represents distance. This formula indicates that work is equal to the product of force and distance. Therefore, the statement is correct.

6. La masse et le poids se mesure en kg.

Vrai

Faux

La masse se mesure en kg mais le poids se mesure en Newtons (N), le poids est mesuré avec in peson tandis que la masse avec une balance.

Explanation

La masse se mesure en kg mais le poids se mesure en Newtons (N), le poids est mesuré avec in peson tandis que la masse avec une balance.

7. Dans un monde sans friction d'air, qu'est-ce qui tombe plus vite, un feuille de papier ou une balle de bowling?

Les deux tombent à la même vitesse

La balle de bowling

Le papier

Ils flottent

Ils expliquent dans ce vidéo pourquoi (anglais): https://www.youtube.com/watch?v=E43-CfukEgs

Explanation

Ils expliquent dans ce vidéo pourquoi (anglais): https://www.youtube.com/watch?v=E43-CfukEgs

8. Le calcule pour trouver l'accélération est quoi? (A= accélération, M= masse, F= force)

F=A/M

AM/FM

A= M/A

A=F/M

The correct formula to calculate acceleration is A = F/M. This formula states that acceleration is equal to the force applied divided by the mass of the object. This means that the acceleration of an object is directly proportional to the force applied and inversely proportional to its mass.

Explanation

The correct formula to calculate acceleration is A = F/M. This formula states that acceleration is equal to the force applied divided by the mass of the object. This means that the acceleration of an object is directly proportional to the force applied and inversely proportional to its mass.

9. L'accélération se mesure en quoi?

m/s

km/h

m/s^2

Années Lumières

L'accélération se mesure en m/s^2, which stands for meters per second squared. This unit represents the change in velocity per unit of time. It indicates how quickly the speed of an object is changing over time. The answer m/s^2 is the correct unit for measuring acceleration, as it quantifies the rate at which an object's velocity is changing.

Explanation

L'accélération se mesure en m/s^2, which stands for meters per second squared. This unit represents the change in velocity per unit of time. It indicates how quickly the speed of an object is changing over time. The answer m/s^2 is the correct unit for measuring acceleration, as it quantifies the rate at which an object's velocity is changing.

10. C'est plus facile à tirer un traîneau avec une petite corde qu'avec une longue corde.

Vrai

Faux

Le plus que la corde est longue le moins l'angle est grande ce qui améliore le force efficace sur l'objet. Feff= Fa x cos de l'angle

Explanation

Le plus que la corde est longue le moins l'angle est grande ce qui améliore le force efficace sur l'objet. Feff= Fa x cos de l'angle

11. C'est quoi la première loi de Newton?

Loi 101

Principe de l'inertie

Loi sur les figues newtons

Principe des actions réciproques

The correct answer is "Principe de l'inertie." The first law of Newton, also known as the law of inertia, states that an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and direction unless acted upon by an external force. This principle explains the concept of inertia, which is the tendency of an object to resist changes in its motion.

Explanation

The correct answer is "Principe de l'inertie." The first law of Newton, also known as the law of inertia, states that an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and direction unless acted upon by an external force. This principle explains the concept of inertia, which is the tendency of an object to resist changes in its motion.

12. Une fusée qui à une masse de 20 000 kg veut atteindre une hauteur de 800 km. Quel est l'énergie nécessaire pour atteindre cette hauteur?

1.6 x 10^10 J

800000 J

1.57 x10^11 J

156960000 J

20000 x 9.81 x 800000 (800km= 800000 m) = 1.57x10^11 J

Explanation

20000 x 9.81 x 800000 (800km= 800000 m) = 1.57x10^11 J

13. Le calcule pour le force résultant (Fr) est quoi? (Fa= force appliqué, Ff= force friction, Feff= force efficace) coche le ou les bonnes réponses.

Fr=Fa x cos de l'angle + Ff

Fr= Fr-Fa

Fr= Feff + Ff

Ff=Fr+Fa x Ff

The correct answer is Fr=Fa x cos de l'angle + Ff, Fr= Feff + Ff. This is because the resultant force (Fr) is calculated by adding the applied force (Fa) multiplied by the cosine of the angle to the friction force (Ff). Additionally, the resultant force can also be calculated by adding the effective force (Feff) to the friction force (Ff).

Explanation

The correct answer is Fr=Fa x cos de l'angle + Ff, Fr= Feff + Ff. This is because the resultant force (Fr) is calculated by adding the applied force (Fa) multiplied by the cosine of the angle to the friction force (Ff). Additionally, the resultant force can also be calculated by adding the effective force (Feff) to the friction force (Ff).

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14. La masse est la

The correct answer is "quantitée de matière contenue dans un corps, quantité de matière contenue dans un corps, quantitée de matière contenue dans un corps qui se mesure en kg". This answer accurately describes the concept of "masse" as the quantity of matter contained in a body, which is measured in kilograms. The repetition of the answer choices may be a typographical error.

Explanation

The correct answer is "quantitée de matière contenue dans un corps, quantité de matière contenue dans un corps, quantitée de matière contenue dans un corps qui se mesure en kg". This answer accurately describes the concept of "masse" as the quantity of matter contained in a body, which is measured in kilograms. The repetition of the answer choices may be a typographical error.

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