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Subject :Physics    Class : Class 8

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Subject :Physics    Class : Class 8

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Subject :Physics    Class : Class 6

The speed of a body gives us an idea of how slow or fast that a body is moving. Speed of a body is the distance travelled by it per unit time. The SI unit of speed is metre per second. It is a scalar quantity. The speed of a running car at any instant of time is shown by an instrument called 'speedometer' and the distance travelled by a car is measured by another instrument called 'odometer'.
If an object is moving with speed (S) in time (t), then, the distance (d) will be

A d = S × t
B
C
D None of these.


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Subject :Physics    Class : Class 8

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Subject :Physics    Class : Class 8

Assertion : The gravitational force makes the earth move around the sun and also makes the moon go around the earth.
Reason : Every objects in the universe exert a force on other objects.
In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as :

A If both assertion and reason are true and reason is the correct explanation of assertion
B If both assertion and reason are true but reason is not the correct explanation of assertion
C If assertion is true but reason is false
D If assertion is false but reason is true.


The answer is A, even the solution is justifying it.

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Subject :Physics    Class : Class 8

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Subject :Physics    Class : Class 6

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Subject :Physics    Class : Class 8

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Subject :Physics    Class : Class 8

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Subject :Physics    Class : Class 6

Ans 1:

Class : >Class 6

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