Answer:
Explanation:
According to the Question
It is given that,
we have to calculate the time taken by ball to reach at maximum height .
Firstly we convert the unit here
↠ u = 72×5/18 m/s
↠ u = 20m/s
Now, using Kinematic Equation
On substituting the value we get
↠ 0 = 20 + (-10) × t
↠ -20 = -10 × t
↠ -20/-10 = t
↠ t = 20/10
↠ t = 2s
The time taken to reach at maximum height :-
We know that the following :-
Initial Velocity = > 72 km/h
Final velocity = > 0
Acceleration due to gravity = > 9.8 or 10
Convert 72 km/h in m/s
= > 20 m/s
= > Now we have to find the time at maximum height :-
We use 1st eq of motion :- v = u + at
v = u + at
0 = 20 + (-10)t (We take gravitation in minus because the ball is thrown in upward direction)
-20 = -10 × t
[tex] \frac{ - 20}{ - 10} = t [/tex]
2 sec = time
Therefore, The time taken to reach at maximum height is 2 sec.
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Verified answer
Answer:
Explanation:
According to the Question
It is given that,
we have to calculate the time taken by ball to reach at maximum height .
Firstly we convert the unit here
↠ u = 72×5/18 m/s
↠ u = 20m/s
Now, using Kinematic Equation
On substituting the value we get
↠ 0 = 20 + (-10) × t
↠ -20 = -10 × t
↠ -20/-10 = t
↠ t = 20/10
↠ t = 2s
To find :-
The time taken to reach at maximum height :-
We know that the following :-
Initial Velocity = > 72 km/h
Final velocity = > 0
Acceleration due to gravity = > 9.8 or 10
Convert 72 km/h in m/s
= > 20 m/s
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Solution :-
= > Now we have to find the time at maximum height :-
We use 1st eq of motion :- v = u + at
v = u + at
0 = 20 + (-10)t (We take gravitation in minus because the ball is thrown in upward direction)
-20 = -10 × t
[tex] \frac{ - 20}{ - 10} = t [/tex]
2 sec = time
Therefore, The time taken to reach at maximum height is 2 sec.
━━━━━━━━━━━━━━━━━━