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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 10

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Subject :Physics    Class : Class 7

'An object may be in the rest as well as in the motion at the same time'. Which one of the following is correct explanation for the above statement?

A Rest and motion are defined on basis of position of an object. So a body may be in rest and in the motion at the same time.
B Object is in rest or in motion depends on the reference point. An object may be in motion with respect to a reference point and at same time the object may be in rest with respect to another reference point.
C Rotatory motion justifies the above statement. In the rotatory motion, object rotates around a fixed axis and does not cover distance. Therefore, object is in motion and in the rest at the same time.
D No, it is not possible that an object is in the motion and in the rest as well.


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Subject :Physics    Class : Class 7

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Subject :Physics    Class : Class 7

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Subject :Physics    Class : Class 8

Ans 1:

Class : >Class 8
C

Ans 2:

Class : >Class 8
C

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Subject :Physics    Class : Class 7

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Subject :Physics    Class : Class 7

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Subject :Physics    Class : Class 7

Which one of the following is true for the uniform speed?

A If speed of the object varies at different interval of time, the object has uniform speed.
B If speed of the object is constant at different intervals of time, the object has uniform speed.
C If a moving object suddenly comes to rest, the object has uniform speed.
D None of these.


Answer is showing option - BBut it should be ---- If speed of the object is equal at equal intervals of time , the object has uniform speed

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