An object may appear to be moving for one person and stationary for some other. For the passengers in a moving bus, the roadside trees appear to be moving backwards. A person standing on the road–side perceives the bus along with the passengers as moving. However, a passenger inside the bus sees his fellow passengers to be at rest.
Most motions are complex. Some objects may move in a straight line, others may take a circular path. Some may rotate and a few others may vibrate. There may be situations involving a combination of these.
(a) Can any object be at absolute rest? (b) Is displacement a scalar quantity? (c) Defineoscillatorymotion.
(d) Definemechanics.
Answers
Answer:
a) Rest and motion are always relative. A body cannot exist at a state of absolute rest or absolute motion. For example, two persons sitting in a moving bus are at rest w.r.t each other but are in motion w.r.t. a person standing on the roadside. ... Thus, there is no object which can be condisered to be at absolute rest
b)Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.
c)The 'to-and-fro' or 'back or forth' motion described by an object as a whole along the same path without any change in the shape of the object is called Oscillatory motion
d)the branch of applied mathematics dealing with motion and forces producing motion.
"the laws of mechanics and electricity predicted that the electrons would spiral inward until they collided with the nucleus"
2.
the machinery or working parts of something.
"he looks at the mechanics of a car before the bodywork"