Forces Deforming Objects, Moments And Centre Of Gravity Flashcards
What is a force that causes an object to deform?
A deforming force.
True or False: The center of gravity is always located at the geometric center of an object.
False.
Fill in the blank: The point at which the weight of an object is evenly distributed is called the ______.
center of gravity.
What is the formula for calculating the moment of a force?
Moment = Force x Distance from pivot.
What unit is used to measure moments?
Newton-meter (Nm).
Multiple Choice: Which of the following affects the position of the center of gravity? A) Shape B) Mass distribution C) Both A and B D) None of the above
C) Both A and B.
What happens to an object’s shape when a force is applied?
It can deform.
True or False: Elastic deformation is permanent.
False.
What type of deformation returns to its original shape once the force is removed?
Elastic deformation.
What type of moment is created when a force acts at an angle?
A moment with a perpendicular component.
What is the relationship between the moment and the lever arm?
The moment increases with a longer lever arm.
Fill in the blank: The center of gravity can change based on the object’s ______.
orientation.
Multiple Choice: Which of the following is NOT a factor in determining the center of gravity? A) Object’s mass B) Object’s size C) Object’s color D) Object’s shape
C) Object’s color.
What is the effect of a moment on an object?
It causes the object to rotate.
True or False: A larger force always results in a larger moment.
True.
What is the term for the distance from the pivot point to the line of action of the force?
Lever arm.
Fill in the blank: When an object is in equilibrium, the sum of moments about any point is ______.
zero.
What is the primary factor that determines whether an object will topple?
The position of its center of gravity.
Multiple Choice: Which material is likely to exhibit plastic deformation? A) Rubber B) Steel C) Glass D) Wood
B) Steel.
True or False: The center of gravity can be outside the physical material of an object.
True.
What is the term for the maximum deformation an object can withstand without permanent change?
Yield point.
Fill in the blank: The moment of a force can also be referred to as ______.
torque.
What does the stability of an object depend on?
The height of the center of gravity and the area of support.
Multiple Choice: Which of the following can cause a permanent deformation? A) Tensile force B) Compressive force C) Shear force D) All of the above
D) All of the above.
What is the effect of increasing the mass of an object on its center of gravity?
It may shift the center of gravity toward the mass.
