a ball is thrown vertically upwards. if it spend 4 seconds in air. find the maximum height achieved by it?
Answers
Step-by-step explanation:
A ball is thrown vertically upwards and returns in 4 seconds. What is the speed with which it was thrown?
Adaptive learning for K-10 grade.
Joao Pedro Braz
Answered 2 years ago
A ball is thrown vertically upwards and returns in 4 seconds. What is the speed with which it was thrown?
Ignoring air resistance, we know that the total time for the ball to return is equal to both the time it took to rise and fall. In this case they are the same, so:
T(Final)=2t(rise and fall)
4=2t
t=2s
The speed with which it was thrown is equal to the initial velocity that the ball had in the moment of rise:
V(0, because it’s the maximum height)=V0−g(gravity)xt
0=V0−20
20=V0
Thus, the ball left the hand(was thrown) with a velocity of 20m/s.
Hope this helped you. Thanks for asking.
Answer:
We have,
Time=4sec & Height =?
Now we use in formula
H= gt²/8
10×4²/8 =20