Question

very Short Answer Type Questions

1 What is origin in graph?

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2 What is speedometer

ans

3 What is the time period of simple pendulum

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3 What is motion

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4 how many types of motion are there name them

ans

Short Answer Type Questions

1 What is quarts clock

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2 What is an oscillation?

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3 explain uniform and non uniform motion

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4 explain how Galileo contributed to the development of clocks

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Long Answer Type Questions

1 What is simple pendulum? explain how it perform oscillatory motion

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Class 7​

Answer 1

Answer:

1. In a Cartesian coordinate system, the origin is the point where the axes of the system intersect. The origin divides each of these axes into two halves, a positive and a negative semiaxi.

2. a piece of equipment in a vehicle that tells you how fast you are travelling.

3.A mass m suspended by a wire of length L is a simple pendulum and undergoes simple harmonic motion for amplitudes less than about 15º.

4. In the world of mechanics, there are four basic types of motion. These four are rotary, oscillating, linear and reciprocating

shot Answer type

1. an electric clock in which the current is regulated and accuracy maintained by the regular vibrations of a quartz crystal.

2.Oscillation is the repetitive variation, typically in time, of some measure about a central value or between two or more different states. The term vibration is precisely used to describe mechanical oscillation. Familiar examples of oscillation include a swinging pendulum and alternating current.

3.UNIFORM MOTION AND NON-UNIFORM MOTION:A body is said to be in uniform motion, if it travels equal distances in equal intervals of time. A body is said to have non-uniform motion, if it travels unequal distances in equal intervals of time. ... We can say that the motion is called uniform motion

4.Galileo's contribution was essentially theoretical: as a young man he noticed that a pendulum swings at a constant rate (at least, almost constant for small angles). At the end of his life he devised a scheme for using a pendulum to regulate a mechanical clock. ... Vincenzo Vivani became Galileo's assistant in 1639.

long Answer

1.A simple pendulum consists of a ball (point-mass) m hanging from a (massless) string of length fixed at a pivot point P. When displaced to an initial angle and released, the pendulum will swing back and forth with periodic motio. Answer By Arijit Dey Dw20.