MOTION
FORCE AND LAWS OF MOTION
GRAVITATION
WORK and ENERGY
SOUND
100
A body is said to be at rest if it does not change its position with respect to its surroundings.
when is a body said to be in rest?
100
The S.I unit is (N).
What is the S.I unit of force?
100
It is the force of attraction between any two bodies any two bodies in the universe.
what is mean by gravitation?
100
Work is said to be done whenever a force acts on a body and the body moves in the direction of the force.
When is work said to be done?
100
It is a motion which repeats itself in equal intervals of time.
What is mean by periodic motion?
200
A body is said to be in motion if it changes its position with respect to its surroundings.
What is mean by motion ?
200
It may be defined as a push or pull which changes or tends to change the state of rest.
What is mean by force?
200
The motion of a body under the influence of force of gravity alone is called a 'free fall'.
What is mean free fall?
200
It is the S.I.unit of work.
What is joule?
200
Those are the waves in which the particles of the medium vibrate in a direction perpendicular to the direction.
What is transverse waves?
300
It is the distance traveled by a body per unit time.
What is mean by speed?
300
It is the quantity of motion possessed by a body and is equal to the product of the mass and velocity of the body.
What is mean by momentum?
300
The S.I unit is kg.
What is S.I unit of mass?
300
It is kinetic energy and potential energy?
What is the two main forms of energy?
300
It is defined as the time taken by the particles of the medium to complete one vibration.
What is mean time-period?
400
It is defined as the rate of change of velocity with time.
What is mean by acceleration?
400
It is the inability of a body to change by itself its state of rest or of uniform motion in a straight.
What is mean by inertia?
400
It is scalar quantity.
What quantity is mass?
400
The rate of doing work is called power.
What is mean by power?
400
It is the distance traveled by the wave in one second.
What is mean by wave velocity?
500
Negative acceleration is called retardation or deceleration.
What is mean by retardation?
500
If the resultant of several forces acting on a body is zero,the forces are said to be 'balanced force'.
What is mean by balanced force?
500
It is the force with which a body is attracted towards the center of the earth.
What is mean by weight?
500
This law states that energy can neither be created nor destroyed.
state law of conservation of energy?
500
The number of waves contained in the unit length of the medium is called'wave number'.
What is mean by wave number?
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