Podcast
Questions and Answers
What is the correct mathematical representation for the third condition of equilibrium?
What is the correct mathematical representation for the third condition of equilibrium?
When lifting a 5 kg object through a height of 10 m above the ground, how much work is done against gravity?
When lifting a 5 kg object through a height of 10 m above the ground, how much work is done against gravity?
If a force of 15 N is applied at an angle of 60° with the horizontal, what is the vertical component of this force?
If a force of 15 N is applied at an angle of 60° with the horizontal, what is the vertical component of this force?
In the context of work done, when is the total work done by all the forces acting on a body zero?
In the context of work done, when is the total work done by all the forces acting on a body zero?
Signup and view all the answers
What condition must be met for a body to be in equilibrium?
What condition must be met for a body to be in equilibrium?
Signup and view all the answers
Which of the following is a vector quantity related to force components?
Which of the following is a vector quantity related to force components?
Signup and view all the answers
What is the SI unit of thermal conductivity?
What is the SI unit of thermal conductivity?
Signup and view all the answers
In terms of forces, what does equilibrium mean?
In terms of forces, what does equilibrium mean?
Signup and view all the answers
Which substance has a large value of specific heat?
Which substance has a large value of specific heat?
Signup and view all the answers
How many perpendicular components does a force have?
How many perpendicular components does a force have?
Signup and view all the answers
Study Notes
Conditions of Equilibrium
- The third condition of equilibrium is represented as the sum of all torques acting on a body being zero, ensuring rotational stability.
Work Done Against Gravity
- Lifting a 5 kg object through a height of 10 m requires calculating work done using the formula: Work = mass × gravitational acceleration × height.
- With gravitational acceleration approximated at 9.81 m/s², the work done equals 5 kg × 9.81 m/s² × 10 m, resulting in 490.5 Joules.
Force Components
- The vertical component of a force can be determined using trigonometric functions; for a force of 15 N at an angle of 60°, the vertical component is calculated as:
Vertical component = 15 N × sin(60°).
Total Work Done
- Total work done by all forces acting on a body is zero when the body is in a state of static equilibrium, meaning there is no net movement or acceleration.
Equilibrium Conditions
- For a body to be in equilibrium, both the sum of forces and the sum of moments (or torques) acting on it must be zero, indicating no linear or rotational acceleration.
Vector Quantity Related to Force
- A vector quantity related to force components is the force itself, which has both magnitude and direction, influencing both static and dynamic behaviors of objects.
SI Unit of Thermal Conductivity
- The SI unit of thermal conductivity is Watts per meter Kelvin (W/m·K), measuring a material's ability to conduct heat.
Understanding Equilibrium
- In the context of forces, equilibrium means that all acting forces are balanced, resulting in a net force of zero and stability of the object or system.
Substance with Large Specific Heat
- Water is the substance known to have a large specific heat capacity, allowing it to absorb significant amounts of heat without a large change in temperature.
Perpendicular Components of a Force
- A force can be resolved into two perpendicular components: horizontal and vertical, allowing for easier analysis of motion and equilibrium.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge with this full book MCQs quiz covering all important concepts in Physics. This quiz consists of multiple-choice questions with a time limit of 35 minutes and a total of 20 marks.
