Motion In A Straight Line

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MCQs

A train has a speed of 60 km/h. for the first one hour and 40 km/h for the next half hour. Its average speed in km/h is

0 points

53.33

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A 150 m long train is moving with a uniform velocity of 45 km/h. The time taken by the train to cross a bridge of length 850 meters

0 points

Clear selection

The ratio of the numerical values of the average velocity and average speed of a body is always

0 points

Unity

Unity or less

Unity or more

Less than unity

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The correct statement from the following is

5 points

A body having zero velocity will not necessarily have zero acceleration

A body having zero velocity will necessarily have zero acceleration

A body having uniform speed can have only uniform acceleration

body having non-uniform velocity will have zero acceleration

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The displacement of a body is given to be proportional to the cube of time elapsed. The magnitude of the acceleration of the body is

5 points

Increasing with time

Decreasing with time

Constant but not zero

Zero

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