Motion in a Str...

An aeroplane is moving with horizontal velocity u at height h. The velocity of a dropped from it on the earth\'s surface will be (g us acceleration due to gravity)

A rocket is fired upward from the earth\'s surface such that it creates an acceleration of 19.6 m/sec². If after 5 sec its engine is switched off, the maximum height of the rocket from earth\'s surface would be

A bullet is fired with a speed of 1000 m/sec in order to hit a target 100 m away. If g = 10 m/sec², the gun should be aimed

A body starts to fall freely under gravity. The distances covered by it in first, second and third second are in ratio

P, Q and R are three balloons ascending with velocities U , 4U and 8U respectively. If stones of the same mass be dropped from each, when hey are at the same height then

A body is projected up with a speed \'u\' and the time taken by it is T to reach the maximum height H. Pick out the correct statement

A body falling for 2 sec covers a distance S equal to that covered in next second. Taking g = 10 m/s², S is equal to

A ball of mass m₁ and another ball of mass m₂ are dropped from equal height. If time taken by the balls are t₁ and t₂ respectively, then

A body sliding on a smooth inclined plane requires 4 sec to reach the bottom starting from rest at the top. How much time does it take to cover one-fourth distance from rest at the top?

A ball is dropped downwards. After 1 sec another ball is dropped downwards from the same point. What is the distance between them after 3 sec?