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Whenever a body is thrown vertically upw...

Whenever a body is thrown vertically upwards with a certain velocity, the upwards motion is opposed by gravitational pull of earth and resisatnce of air. The velocity of the body goes on decreasing at a constant rate `(= - g)`.As soon as upward velocity of body becomes zero, it cannot rise any more. The height it has attained is the maximum height. The body then begins to fall downwards with an acceleration `= g`.
Read the above passege and answer the following questions :
(i) A body is thrown upwards with a velocity of `19.6 m//s`. What is the maximum height attained?
(ii) With what velocity will the body hit the ground?
(iii) What are the implications of this study in day to day life ?

Text Solution

AI Generated Solution

To solve the problem step by step, we will address each part of the question based on the concepts of motion under gravity. ### (i) Maximum Height Attained 1. **Identify the given values**: - Initial velocity (u) = 19.6 m/s - Acceleration due to gravity (g) = 9.8 m/s² (acting downwards) ...
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Knowledge Check

  • The acceleration of a body projected upwards with a certain velocity is

    A
    9.8 `m/s^(2)`
    B
    `-9.8 m/s^(2)`
    C
    zero
    D
    insufficient data

  • If a body is thrown up with the velocity of 15 m/s then maximum height attained by the body is (g = 10m//s)

    A
    `11.25m`
    B
    `16.2m`
    C
    `24.5m`
    D
    `7.62m`

  • A body is thrown vertically upwards which graph represents variation of velocity w.r.t time

    A
    B
    C
    D

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    Whenever a body is thrown up with a certain velocity, the upward motion is opposed by gravitational pull of earth and also by the resistance of air. Therefore, velocity of the body goes on decreasing.When this velocity becomes zero, the body cannot rise further. It has attained, what is called 'maximum height'. from this height, the body begins to fall downloads under the action of gravity. Read the above passage and answer the following question: (i)At the highest point, what are the velocity and acceleration of the body? (ii)What is the maximum height attained by a body thrown upwards with a velocity of 19.6 m//s? Take g=9.8 m//s^(2) . (iii) What value in life do you learn from this concept ?

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