Home
Class 12
PHYSICS
Air offers a retardation of 6m//s^(2) to...

Air offers a retardation of `6m//s^(2)` to a particle. If it is projected vertically upwards with a speed of `96m//s` from ground then the time of flight is : `(g = 10 m//s^(2))`

A

`19.2s`

B

`12s`

C

`18s`

D

`24s`

Text Solution

Verified by Experts

The correct Answer is:
C
Air offers …………
Maximum height `= (u^(2))/(2(g+a)) = (96xx96)/(2xx16) = 288m`
Time of light `= sqrt((2H)/(g+a))+sqrt((2H)/(g-a))`
`= sqrt((2xx288)/(16)) + sqrt((2xx288)/(4))`
`= 6+12=18s`
Promotional Banner

Similar Questions

Explore conceptually related problems

A ball of mas 2gm is thrown vertically upwards with a speed of 30m//s from a tower of height 35m . (Given g=10m//s^(2) )

A ball is projected vertically up with speed 20 m/s. Take g=10m//s^(2)

A ball is projected vertically up wards with a velocity of 100 m/s. Find the speed of the ball at half the maximum height. (g=10 m//s^(2))

If a ball is thrown vertically upwards with a velocity of 40m//s , then velocity of the ball after 2s will be (g = 10m//s^(2))

A stone is thrown vertically upwards with a speed of 20 m/s. How high will it go before it begins to fall? (g=9 .8 m//s^2)

A particle is projected vertically upward in vacum with a speed 40m//s then velocity of particle when it reaches at maximum height 2s before, is (Take g=10m//s )

An object is thrwon vertically upwards with a velocity of 60 m/s. After what time it strike the ground ? Use g=10m//s^(2) .