4. Explain the meaning of the terms rest and motion.
2. Comment on the statement ‘rest and motion are
relative terms'. Give an example.
3. Fill in the blanks using one of the words : at
rest, in motion.
(a) A person walking in a compartment of a
stationary train is arres. relative to the
compartment and is lomatic relative to the
platform
(b) A person sitting in a compartment of a moving
train is .motion... relative to the other person
sitting by his side and is..tas.... relative
to the platform.
4. Name five different types of motion you know.
5. What do you mean by translatory motion ? Give
one example.
Answers
Answer:
1. Rest - A body is said to be at rest if it does not change its position with respect to its immediate surroundings.
Motion - A body is said to be in motion if it changes its position with respect to its immediate surrounding.
2.Imagine you are sitting inside a moving bus. When you look outside you will observe that you are moving. Now look to the roof of the bus. With respect to the roof of bus, you are at rest. Hence it is concluded that rest and motion are relative terms.
3.(a) A person walking in a compartment of a stationary train is in motion relative to the compartment and is in motion relative to the platform.
(b) A person sitting in a compartment of a moving train is at rest . relative to the other person sitting by his side and is in motion relative to the platform.
4.Translatory motion.
Rotatory motion.
Oscillatory motion.
Vibratory motion.
Periodic motion.
Multiple motion.
Random motion.
5.If an object like a vehical, moves in line in such a way that every point of the object moves through the same distance in the same time, then the motion of the object is called translatory motion.
Example:
The motion of an apple falling from a tree, the motion of a man walking on a road, the motion of a box when pushed from one comer of room to the other, are all the tranlatory motion.
1.Rest - a body is said to be at rest, if it does not change its position with respect to its surrounding with time. Motion - a body is said to be at motion, if it changes its position with time.
2.Imagine you are sitting inside a moving bus. When you look outside you will observe that you are moving. ... With respect to the roof of bus, you are at rest. Hence it is concluded that rest and motion are relative terms.
3.a.atrest, inmotion
b.motion,rest
4.The different types of motion are :
Translatory motion.
Rotatory motion.
Oscillatory motion.
Vibratory motion.
Periodic motion.
Multiple motion.
Random motion.
5.If an object, like a vehicle, moves in a line in such a way that every point of the object moves through the same distance in the same time, then the motion of the object is said to be in translatory motion. Example : mango falling from a tree.