Quiz Details
QZ-20251214-30101
Topics:
Contrôle physique chimie de première année bac sciences mathématiques de physique sur les leçons l'énergie cinétique et potentiel de posonteur et mécanique
Difficulty:
Level 3 - Medium
Questions:
5
Generated:
December 14, 2025 at 07:08 PM
Generated by:
Guest User
Instructions: Select an answer for each question and click "Check Answer" to see if you're correct. Then view the explanation to learn more!
1 What is the formula for kinetic energy (KE)?
Correct Answer:
C
Explanation: The correct formula for kinetic energy is KE = 1/2 mv^2, where m is mass and v is velocity.
Explanation: The correct formula for kinetic energy is KE = 1/2 mv^2, where m is mass and v is velocity.
2 What type of energy is associated with an object's height above the ground?
Correct Answer:
C
Explanation: Potential energy is the energy held by an object because of its position relative to other objects, commonly height in a gravitational field.
Explanation: Potential energy is the energy held by an object because of its position relative to other objects, commonly height in a gravitational field.
3 If an object falls from a height, what happens to its potential energy?
Correct Answer:
A
Explanation: As an object falls, its height decreases, leading to a decrease in potential energy, which is converted to kinetic energy.
Explanation: As an object falls, its height decreases, leading to a decrease in potential energy, which is converted to kinetic energy.
4 At what point during the fall of an object is its kinetic energy the highest?
Correct Answer:
A
Explanation: Kinetic energy is highest just before the object hits the ground, as it has converted most of its potential energy into kinetic energy.
Explanation: Kinetic energy is highest just before the object hits the ground, as it has converted most of its potential energy into kinetic energy.
5 Which of the following statements is true regarding mechanical energy?
Correct Answer:
C
Explanation: Mechanical energy, which is the sum of kinetic and potential energy, is conserved in a closed system without friction.
Explanation: Mechanical energy, which is the sum of kinetic and potential energy, is conserved in a closed system without friction.