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Sukriti throws a ball upwards , from a r...

Sukriti throws a ball upwards , from a rooftop which is 8 m high from ground level . The ball reaches to some maximum height and then returns and hit the ground .
It height of the ball at time t (in sec) is represented by h(m) , then equation of its path is given as `h = -t^2 + 2t + 8`
Based on above information , answer the following

The maximum height achieved by ball is

A

7 m

B

8 m

C

9m

D

10 m

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Soumya throws a ball upwards, from a rooftop, 80 m above. It will reach a maximum height and then fall back to the ground. The height of the ball from the ground at time 't' is 'h', which is given by h=-16t^(2)+64t+80 What is the height reached by the ball after 1 second ?

Soumya throws a ball upwards, from a rooftop, 80 m above. It will reach a maximum height and then fall back to the ground. The height of the ball from the ground at time 't' is 'h', which is given by h=-16t^(2)+64t+80 What are the two possible times to reach the ball at the same height of 128 m ?

Knowledge Check

  • Soumya throws a ball upwards, from a rooftop, 80 m above. It will reach a maximum height and then fall back to the ground. The height of the ball from the ground at time 't' is 'h', which is given by h=-16t^(2)+64t+80 How long will the ball take to hit the ground ?

    A
    4 seconds
    B
    3 seconds
    C
    5 seconds
    D
    6 seconds

  • Soumya throws a ball upwards, from a rooftop, 80 m above. It will reach a maximum height and then fall back to the ground. The height of the ball from the ground at time 't' is 'h', which is given by h=-16t^(2)+64t+80 After 6 seconds, where is the ball ?

    A
    At the ground
    B
    rebounds
    C
    at highest point
    D
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  • Soumya throws a ball upwards, from a rooftop, 80 m above. It will reach a maximum height and then fall back to the ground. The height of the ball from the ground at time 't' is 'h', which is given by h=-16t^(2)+64t+80 What is the maximum height reached by the ball ?

    A
    154 m
    B
    144 m
    C
    136 m
    D
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