Podcast
Questions and Answers
In static (rotational) equilibrium, what condition must be satisfied?
In static (rotational) equilibrium, what condition must be satisfied?
- The system is stationary
- Net force on the rigid body is zero
- The rigid body is at rest
- Net torque on the rigid body is zero (correct)
What does dynamic (translational) equilibrium imply?
What does dynamic (translational) equilibrium imply?
- The rigid body is in rotational equilibrium
- The system is not at rest
- The net force on the rigid body is zero (correct)
- The system is travelling at constant velocity
What physical quantity causes an object to begin rotating or moving in a circle?
What physical quantity causes an object to begin rotating or moving in a circle?
- Torque (correct)
- Force
- Weight
- Mass
What is the equation for torque?
What is the equation for torque?
What does a net torque of zero indicate about a rigid body?
What does a net torque of zero indicate about a rigid body?
When is a seesaw perfectly balanced?
When is a seesaw perfectly balanced?
What factor does torque depend on?
What factor does torque depend on?
In dynamic equilibrium, what is the condition for the rigid body?
In dynamic equilibrium, what is the condition for the rigid body?
What does a net force of zero indicate about a rigid body?
What does a net force of zero indicate about a rigid body?
What is the point of rotation in a lever known as?
What is the point of rotation in a lever known as?
In a first class lever, when is the mechanical advantage (MA) greater than 1?
In a first class lever, when is the mechanical advantage (MA) greater than 1?
Which type of lever is commonly found in the human body, producing speed and range of motion movements?
Which type of lever is commonly found in the human body, producing speed and range of motion movements?
What serves as the fulcrum in the human body's lever system?
What serves as the fulcrum in the human body's lever system?
What movement is produced by a third class lever in the human body?
What movement is produced by a third class lever in the human body?
In a second class lever, where is the load positioned in relation to the fulcrum and the force?
In a second class lever, where is the load positioned in relation to the fulcrum and the force?
What is the ratio used to calculate mechanical advantage (MA) in a lever?
What is the ratio used to calculate mechanical advantage (MA) in a lever?
In a third class lever, where is the force positioned in relation to the fulcrum and the load?
In a third class lever, where is the force positioned in relation to the fulcrum and the load?
What is the function of the bones in the human body's lever system?
What is the function of the bones in the human body's lever system?
When is the mechanical advantage (MA) equal to 1 in a lever system?
When is the mechanical advantage (MA) equal to 1 in a lever system?
What is the characteristic feature of a second class lever?
What is the characteristic feature of a second class lever?
What does a positive torque indicate when using the right hand rule for counterclockwise rotation?
What does a positive torque indicate when using the right hand rule for counterclockwise rotation?
Where is the center of mass or center of gravity of a symmetric object located?
Where is the center of mass or center of gravity of a symmetric object located?
How can the center of mass of an irregular-shaped object be determined?
How can the center of mass of an irregular-shaped object be determined?
In what position does a system experience static stable equilibrium?
In what position does a system experience static stable equilibrium?
What is a lever?
What is a lever?
What does a negative torque indicate when using the right hand rule for clockwise rotation?
What does a negative torque indicate when using the right hand rule for clockwise rotation?
Where can the whole mass of a body be considered to be concentrated?
Where can the whole mass of a body be considered to be concentrated?
What does the intersection of drawn lines from different suspension points indicate for an irregular-shaped object?
What does the intersection of drawn lines from different suspension points indicate for an irregular-shaped object?
What does a system experience if it returns to equilibrium after being small displaced?
What does a system experience if it returns to equilibrium after being small displaced?
What is the condition for a system to be in static stable equilibrium?
What is the condition for a system to be in static stable equilibrium?
What type of device is a lever?
What type of device is a lever?
