1 True or False - Indicate whether you believe the statement is true or false T
ID: 2074850 • Letter: 1
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1 True or False - Indicate whether you believe the statement is true or false T F A particle is an idealization of a "point mass" while a rigid body is ideally "strong." T F A statically determinate body is one that is properly constrained against motion. T F Transmissibility says that any external force can be assumed as being applied at any point along its line of T F Ifa 3-dimensional rigid body acted upon by 3 forces is in equilibrium, then 3 L.o.a.'s meet at a single point T F Ifthe external forces on a rigid body sum to the zero vector, then the body is in static equilibrium. T F A couple is a set of two forces that are equal in magnitude, have perpendicular lines of action and have T F Weight is an internal force. T F We discussed five operations to develop equivalent force systems, four of which are pairs that counteract T F Refer to Chapter 2 "hanging bucket" problem done for homework. Suppose that the weight had been 1250 T F A 2-dimensional rigid body that is hinged in two places cannot be in static equilibrium. T F In this class, we will always assume that gravity acts along the z-axis in a 3-dimensional problem action. opposite sense each other N rather than 1000 N. Then force P would have been greater than 275 NExplanation / Answer
1. Yes a point mass can be considered an idealization of a particle often referred to as "point particle" . Also, a rigid body is something that doesn't undergo any deformation, i.e.it is ideally "strong"
Answer: TRUE
2. A structure is said to be statically determinate if has only enough supports / constraints , such that the reactions can be calculated using static equilibrium equations alone
Answer : FALSE
3. As per the principle of transmissibility of force, a force acting at a point on a body, can be moved anywhere on the body along its line of action without changing its effect.
Answer: TRUE
4. A 3D body can be acted upon by 3 forces in equilibrium, without their l.o.a's meeting at a point.such a system is called non-concurrent force system.
Answer: FALSE
5. If the sum of all forces on a body is zero, than the body is said to be static in equilibrium.
Answer : TRUE
6. Two equal and opposite forces with "parallel" line of actions constitute a couple.
Answer: FALSE
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