Home
Class 9
PHYSICS
A ball is thrown vertically upwards. It ...

A ball is thrown vertically upwards. It returns 6 s later. Calculate (i) the greatest height reached by the ball and (ii) the initial velocity of the ball.

Text Solution

Verified by Experts

Total time = 6 s.
`therefore` It takes 3 s to go to greatest height.
`therefore` In 3 s, the final velocity becomes zero.
Use `v = u + at` and `v^2 = u^2 + 2as`
`u= 30 m s^(-1), h= 45 m`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • DESCRIPTION OF MOTION

    CENGAGE PHYSICS|Exercise CONSOLIDATED EXERCISE (COMPREHENSION)|7 Videos

  • DESCRIPTION OF MOTION

    CENGAGE PHYSICS|Exercise CONSOLIDATED EXERCISE (MATCH THE COLUMNS)|3 Videos

  • DESCRIPTION OF MOTION

    CENGAGE PHYSICS|Exercise MANDATORY EXERCISE (EXERCISE SET - II)|7 Videos

  • ELASTICITY

    CENGAGE PHYSICS|Exercise OLYMPIAD AND NTSE LEVEL EXERCISES|10 Videos

Similar Questions

Explore conceptually related problems

A ball is thrown vertically upward with a velocity of 20 m/s. Calculate the maximum height attain by the ball.

A ball is thrown vertically upwards with a velocity of 4.9m/s Find (i) the maximum height reached by the ball (ii) time taken to reach the maximum height

Knowledge Check

  • A ball is thrown vertically upwards. It was observed at a height h twice after a time interval Deltat . The initial velocity of the ball is

    A
    `sqrt(8gh+(g Deltat)^(2))`
    B
    `sqrt(2gh+((gDeltat)/(2))^(2))`
    C
    `sqrt(8gh+(2gDeltat)^(2))`
    D
    `sqrt(2gh)`

    • Similar Questions

    Explore conceptually related problems

    A ball is thrown vertically upward. What is the magnitude of velocity at the highest point ?

    When a ball is thrown vertically upwards, at the maximum height

    A ball is thrown vertically upwards with a velocity of 49 ms^-1 . Calculate :The maximum height to which it rises

    A ball is thrown vertically upwards with a velocity of 49 m/s Calulate: (i) the maximum height to which it rises . (ii) the total time it takes to return to the surface of the earth .

    A ball is thrown vertically upwards with a velocity of 49 m//s . Calulate (i) The maximum height to which it rises, (ii) the total time it takes to return to the surface of the earth.

    An object is thrown vertically upwards and rises to a height of 10m. Calculate (i) the velocity with which the object was thrown upwards and (ii) the times taken by the object to reach the highest point (g=9.8m//s^2)

    A ball is thrown vertically upwards with a velocity of 98m//s . Calculate (i) The maximum height to which it rises. (ii) Total time it takes to return to earth.

    Home
    Profile