Motion in A Str...

A body is projected horizontally from a certain height, (h) then time of descent is 

The distance travelled by a body starting with a velocity of $$\displaystyle 20\ { ms }^{ -1 }$$, and moving with an acceleration of $$\displaystyle 2\ { ms }^{ -2 }$$, in the $$\displaystyle { 8 }^{ th }$$ second is ____ m.

A stone thrown vertically passes a certain point P at the end of 2 seconds and 8 seconds respectively. Find the maximum height reached by the stone .$$\displaystyle (Take\quad g ={ 10\quad ms }^{ -2 }) $$

A stone is released from a hot air balloon which is rising steadily with a velocity of $$\displaystyle { 4\quad ms }^{ -1 }$$. The velocity of the stone at the end of 3 s after it is released is  _____ $$\displaystyle { ms }^{ -1 }$$

A body starts moving with an initial velocity of $$\displaystyle 5\ { ms }^{ -1 }$$ and an acceleration of $$\displaystyle 1\ { ms }^{ -2 }$$. The distance travelled by it in the 5th second is 

A body starts from rest and moves with uniform acceleration for 2s. If then decelerates uniformly for 3s and stops. If deceleration is $$\displaystyle { 4\quad ms }^{ -2 }$$, the acceleration of the body is ____ $$\displaystyle {  ms }^{ -2 }$$

The ratio of the time taken by a body moving with uniform acceleration in reaching two points P and Q along a straight line path is 1 : 2. If the body starts from rest and moves linearly, the ratio of the distance between P and Q from the starting point is:

A hollow iron ball (A) and a solid iron ball (B) and cricket ball (C) are dropped from the same height. Which among the three balls reaches the ground first? Assuming there is no resistance due to air.

A body starts from rest and moves with uniform acceleration for 3s. It then decelerates uniformly for 2s. and stops. If the deceleration is $$\displaystyle 3 \ { ms }^{ -2 }$$ the maximum velocity of the body is ____ $$\displaystyle { ms }^{ -1 }$$

A body falls from a height of $$45$$ m above the ground. Find the time taken by the body to reach the ground. $$\displaystyle (Take \ g = 10 { ms }^{ -2 })$$