What is lower pair with example?
A lower pair is one in which there occurs a surface or area contact between two members, e.g. nut and screw, universal joint used to connect two propeller shafts.
Which of the following is an example of higher pair?
Explanation: The cam and follower is an example of higher pair as it is kept in contact by the forces exerted by spring and gravity.
What is the example of turning pair?
Turning Pair: This consists of two elements connected in such a manner that one is constrained to turn or revolve about a fixed axis of another element. Example: Shaft with a collar at both ends revolving in a circular hole.
When the two elements of a pair have line or point contact when in motion the pair formed is called a?
Explanation: When the two elements of a pair have a line or point contact when relative motion takes place and the motion between the two elements is partly turning and partly sliding, then the pair is known as higher pair.
What are the types of constrained motion?
There are three types of Constrained Motion:
- Completely constrained.
- Partially or Successfully constrained motion and.
- Incompletely constrained motion.
Which of the following is an example of spherical pair?
The ball and socket joint, attachment of a car mirror, pen stand etc., are the examples of a spherical pair.
What kind of contact can be established for a lower pair?
Detailed Solution. Concept: Lower pair: When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as lower pair. Sliding pairs, turning pairs and screw pairs are the examples of lower pairs.
Which pair are considered as higher pairs?
A pair is said to be higher pair when the connection between two elements has only a point or line of contact. Examples of higher pairs are: A point contact takes place when spheres rest on a plane or curved surfaces (in the case of ball bearings) Contact between teeth of a skew-helical gears.
Which of the following is a lower pair *?
Lower pair: A pair is said to be a lower pair when the connection between two elements is through the area of contact. Ex. Revolute Pair, Prismatic Pair (Piston and cylinder ), Screw Pair, Cylindrical Pair, Spherical Pair (Ball and socket), Planar Pair, etc.
Which of the following are examples of forced closed kinematic pairs?
Forced closed kinematic pairs – If the contact between the two pairs is maintained by application of force. Door closing mechanism : It forces the door to be closed when opened….
- Cam and roller mechanism.
- Door closing mechanism.
- Slider-crank mechanism.
- Automotive clutch operating mechanism.
What is lower pair and higher pair?
Lower pair: “When the two elements of a pair have surface(area) contact while in motion the pair is called a lower pair.” motion then the pair is known as higher pair.”
What is an example of constrained motion?
Constrained motion results when an object is forced to move in a restricted way. For example, it may have to move along a curved track, to slide on a table that may accelerate upwards, to stay in contact with an accelerating wedge, etc.