A vertically projected body attains the ...

A vertically projected body attains the maximum height in `6s`. The ratio of kinetic energy at the end of `3^(rd)` second to decrease in kinetic energy in the next three seconds is

A

`1 : 1`

B

`1 : 3`

C

`3 : 1`

D

`9 : 1`

Text Solution

Verified by Experts

The correct Answer is:

`(1)`

`t_(a) = u /g = 6 Rightarrow u = 6g`
`KE : Delta KE = 1/2m(u - gt)^(2): (1/2m(u - gt)^(2) - 0)`

Topper's Solved these Questions

WORK , ENERGY & POWER
NARAYNA|Exercise EXERCISE -III|54 Videos
WORK , ENERGY & POWER
NARAYNA|Exercise EXERCISE IV|43 Videos
WORK , ENERGY & POWER
NARAYNA|Exercise EXERCISE -II (C.W)|75 Videos
WAVES
NARAYNA|Exercise Exercise-IV|56 Videos
WORK POWER AND ENERGY
NARAYNA|Exercise Level-VI (Integer)|12 Videos

Similar Questions

Explore conceptually related problems

A body starts from rest and is acted on by a constant force. The ratio of kinetic energy gained by it in the first five seconds to that gained in the next five seconds is

A body thrown vertically upwards with an initial valocity u reaches maximum height in 6 s. The ratio of the distances traveled by the body in the first second the seventh second is

The potential energy of a projectile at maximum height is 3/4 times kinetic energy of projection.Its angle of projection

A stone is projected vertically up to reach maximum height h. The ratio of its potential energy to its kinetic energy at a height 4/5h , will be

A stone is projected vertically upward to reach maximum height h. The ratio of its kinetic energy to its potential energy at a height (4)/(5) h, will be

A body of mass m thrown vertically upwards attains a maximum height h. At height will its kinetic energy be 75% of its intial value?

A body starts from rest and moves with uniform acceleration. What is the ratio of kinetic energies at the end of 1st , 2nd and 3rd seconds of its journey ?

Kinetic energy of a body decreases with the increase in mass.

NARAYNA-WORK , ENERGY & POWER -EXERCISE -II (H.W)

A block of mass 2 kg is on a smooth horizontal surface. A light of for...
Text Solution
|
n' identical cubes each of mass 'm' and edge 'L' are on a floor. If th...
Text Solution
|
A vertically projected body attains the maximum height in 6s. The rati...
Text Solution
|
The kinetic energy K of a particle moving along a circle of radius R d...
Text Solution
|
A uniform chain of mass m and length l is placed on a smooth table so ...
Text Solution
|
These diagrams represent the potential energy U of a diatomic molecule...
Text Solution
|
The potential energy of a particle of mass 5 kg moving in the x-y plan...
Text Solution
|
A particle of mass m1 is moving with a velocity v(1) and another parti...
Text Solution
|
The potential energy of a certain spring when stretched through a dist...
Text Solution
|
Match the following {: ( "Column I", " Column II"),( "(A)Work", " (p...
Text Solution
|
When a bullet is fired a target, its velocity dwecreases by half after...
Text Solution
|
A bullet of mass 10 gm is fired horizontally with a velocity 1000 ms^(...
Text Solution
|
A block of mass 5 kg is initially at rest on a rough horizontal surfac...
Text Solution
|
A block of mass m = 25 kg on a smooth horizontal surface with a veloci...
Text Solution
|
A body freely falls from a certain height onto the ground in a time 't...
Text Solution
|
The potential energy function for the force between two atoms in a dia...
Text Solution
|
The variation of potential energy U of a body moving along x - axis va...
Text Solution
|
The PE of a 2 kg particle, free to move along x-axis is given by V(x)=...
Text Solution
|
Figure given below shows the variation of potential energy function U(...
Text Solution
|
A ball is projected vertically down with an initial velocity from a h...
Text Solution
|