4. Name five different types of motion you know.
5. What do you mean by translatory motion ? Give
one example.
6. Explain the meanings of (i) rectilinear motion,
and (ii) curvilinear motion. Give one example of
each.
7 What is rotatory motion? Give two examples.
8. What is meant by circular motion? Give one
example.
9. How does rotatory motion differ from circular
motion?
Answers
Answer:
4.There are different types of motion: translational, rotational, periodic, and non periodic 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.
6.Rectilinear motion — If the motion of a body is along a straight line, it is said to be the rectilinear or linear motion. ... For example, the motion of a cycle while taking a turn on the road, a car moving along a curved path, a ball thrown by an athlete are in curvilinear motion.
7.Rotatory motion - A body is said to be in a rotatory motion or a circular motion if it moves about a fixed axis without changing the radius of its motion. Examples: The blades of a fan, a spinning wheel.
8.Examples of circular motion include: an artificial satellite orbiting the Earth at a constant height, a ceiling fan's blades rotating around a hub, a stone which is tied to a rope and is being swung in circles, a car turning through a curve in a race track, an electron moving perpendicular to a uniform magnetic field, ...
9.In rotatory motion, the axis of rotation passes from a point in the body itself whereas, in circular motion, the axis of revolution passes through a point outside the body. Thus the motion of earth around the sun is the circular motion whereas the motion of earth about its own axis is the rotational motion.
Answer:
4.There are different types of motion: translational, rotational, periodic, and non periodic 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.
6.Rectilinear motion — If the motion of a body is along a straight line, it is said to be the rectilinear or linear motion. ... For example, the motion of a cycle while taking a turn on the road, a car moving along a curved path, a ball thrown by an athlete are in curvilinear motion.
7.Rotatory motion - A body is said to be in a rotatory motion or a circular motion if it moves about a fixed axis without changing the radius of its motion. Examples: The blades of a fan, a spinning wheel.
8.Examples of circular motion include: an artificial satellite orbiting the Earth at a constant height, a ceiling fan's blades rotating around a hub, a stone which is tied to a rope and is being swung in circles, a car turning through a curve in a race track, an electron moving perpendicular to a uniform magnetic field, ...
9.In rotatory motion, the axis of rotation passes from a point in the body itself whereas, in circular motion, the axis of revolution passes through a point outside the body. Thus the motion of earth around the sun is the circular motion whereas the motion of earth about its own axis is the rotational motion.