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1.Assertion:The position time graph of a body moving uniformly in a straight line parallel to position axis. Reason:The position time graph in a uniform motion gives the velocity of an object.
2.Assertion:Average speed is equal to total distance travelled divided by total time taken. Reason:The average speed of an object may be equal to arithmetic mean of individual speed. MY DOUPT: AVERAGE SPEED = \(\frac {(V_1+V_2)}2 \), FOR FIRST HALF OF TIME , the velocity is \(V_1\) and the NEXT HALF OF TIME, the velocity is \(V_2\).Form this situiation average speed may be equal to arithmetic mean of individual speed.
Updated Fri, 28 Sep 2018 12:57 pm


Two trains A and B of length 400 m each are moving on two parallel tracks with a uniform speed of 72 km/ h in the same direction, with A ahead of B. The driver of B decides to overtake A and accelerates by \(1 m/s^2\). If after 50 s, the guard of B just brushes past the driver of A, what was the original distance between them?
Updated Thu, 20 Sep 2018 04:38 pm