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CBSE Class 9 Answered

<div> <ul> <li><strong>A train starting from rest moves with a uniform acceleration of 0.2 m/s 2 for five minutes.Calculate the speed acquired and the distance travelled in this time. &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</strong></li> </ul> </div> <div>&nbsp;</div> <div> <ul> <li><strong>From a station &lsquo;X&rsquo; a train starts from rest and attains a speed of 54 km/h in 10 s, then with this uniform speed it moves for 8 minutes and then by applying brakes it stops at station &lsquo;Y&rsquo; in 6 s.Find the distance between station &lsquo;X&rsquo; and &lsquo;Y&rsquo;.</strong></li> </ul> </div> <div> <div>&nbsp;</div> <div> <ul> <li><strong>Draw a position-time graph and a speed-time graph for a ball thrown vertically upwardswhich comes to rest on reaching the ground.</strong></li> </ul> </div> </div> <div>&nbsp;</div> <div> <ul> <li><strong>If a ball hits the ground with velocity &lsquo;v&rsquo;, it bounces back up with velocity &lsquo;v&rsquo;. If sucha ball is dropped from a height &lsquo;h&rsquo; above the ground, how high will it bounce ? Justify your answer.</strong></li> </ul> </div> <div>&nbsp;</div> <div> <ul> <li><strong>Why does (second) 2 occurs in the unit of acceleration ?</strong></li> </ul> </div> <div>&nbsp;</div> <div> <ul> <li><strong>A body moving with a velocity of 2 m/s acquires a velocity of 10m/s in 5s. Find its acceleration.</strong></li> </ul> </div> <div>&nbsp;</div> <div> <ul> <li><strong>When can we say the motion of an object as uniform motion ? What can be the shape of thepath covered by a moving object to have uniform speed and uniform velocity ?</strong></li> </ul> </div>
Asked by arunk.agarwal | 25 May, 2016, 08:43: AM
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