Question 1 :
From a building two balls A and B are thrown such that A is thrown upwards and B downwards (both vertically). If $\displaystyle { v }_{ A }$ and $\displaystyle { v }_{ B }$ are their respective velocities on reaching the ground, then
Question 2 :
A ball is dropped off a high building and strikes the ground with an impact velocity of 30 m/s. Calculate the height of building :<br/>
Question 3 :
A ball is dropped from a certain height, and at that exact same moment a rock is fired horizontally from the exact same height above ground level.<br>Assuming that air resistance is negligible, which object will strike the ground first?
Question 4 :
A body projected vertically up with a velocity of 10 m $s^{-1}$ reaches a height of 20 m. If it is projected with a velocity of 20 m $s^{-1}$ then the maximum height reached by the body will be :
Question 5 :
A passenger in a moving train tosses a coin. If the coin falls behind him, the train must be moving with
Question 6 :
Two cars are moving in the same direction with the same speed $30km/hr$. They are separated by a distance of $5km$ the speed of a car moving in the opposite direction if it meets these two cars at interval of 4 minutes, will be:
Question 7 :
Acceleration of a body projected upwards with a certain velocity is
Question 8 :
Two particles A and B having different masses are projected from a tower with same speed. A is projected vertically upward and B vertically downward. On reaching the ground.<br>
Question 9 :
A rock falls off top of a building and drops to the ground in 3 m 20 sec. what is the height of the building?
Question 10 : A ball is thrown vertically upwards. The positive direction is taken to be in upward direction. Which of the following is the correct sign of the quantities during its ascent?<br/><table class="wysiwyg-table"><tbody><tr><td></td><td>POSITION</td><td>VELOCITY</td><td>ACCELERATION</td></tr><tr><td>(A)</td><td>Positive</td><td>Positive</td><td>Positive</td></tr><tr><td>(B)</td><td>Positive</td><td>Positive</td><td>Negative</td></tr><tr><td>(C)</td><td>Positive</td><td>Negative</td><td>Negative</td></tr><tr><td>(D)</td><td>Negative</td><td>Positive</td><td>Negative</td></tr><tr><td>(E)</td><td>Negative</td><td>Negative</td><td>Negative</td></tr></tbody></table>
Question 11 :
The same retarding force is applied to stop a train. If the speed is doubled, then the distance will be
Question 12 :
If two particles of masses $3kg$ and $6kg$ which are at rest are separated by a distance of $15m$. The two particles are moving towards each other under a mutual force of attraction. Then the ratio of distances travelled by the particles before collision is <br/>
Question 13 : <p>A helicopter is flying south with a speed of $50\ kmh^{-1}$. A train is moving with the same speed towards east. The relative velocity of the helicopter as seen by the passengers in the train will be $50 \sqrt {2}\ kmh^{-1}$ towards</p>
Question 14 : A sign convention is used, the positive direction for position, velocity and acceleration is upward. A ball of mass m is thrown upward with velocity $V$ and caught during returning. Identify the signs of position, velocity and acceleration during descending part of the trajectory.<table class="wysiwyg-table"><tbody><tr><td></td><td>Position</td><td>Velocity</td><td>Acceleration</td></tr><tr><td>(A)</td><td>Positive </td><td>Positive</td><td>Positive</td></tr><tr><td>(B)</td><td>Positive</td><td>Positive</td><td>Negative</td></tr><tr><td>(C)</td><td>Positive</td><td>Negative</td><td>Negative</td></tr><tr><td>(D)</td><td>Negative</td><td>Positive</td><td>Negative</td></tr><tr><td>(E)</td><td>Negative</td><td>Negative</td><td>Negative</td></tr></tbody></table>
Question 15 :
A stone is thrown upwards and it rises to a height of $200 m$. The relative velocity of the stone with respect to the earth will be maximum at :
Question 16 :
Three bodies $A, B$ and $C$ are moving in a straight line in the same direction such that relative velocity of $A$ w.r.t $B$ is $2m/s$, relative velocity of $B$ w.r.t $C$ is $5m/s$.<br/>Find the relative velocity of $C$ w.r.t $A$. 
Question 17 :
A body is thrown up with an initial velocity u and it covers a maximum height of h, then h is equal to
Question 18 :
A ball is released from the top of a tower of height h metres. It takes T seconds to reach the ground. What is the position of the ball in ${ T }/{ 3 }$ seconds?
Question 19 :
If an iron ball and a wooden ball of the same radius are released from a height h in vaccum then time taken by both of them to reach ground will be:-
Question 20 :
A toy rocket is launched straight up. At the exact top of its flight path, which of the following is true?
