Respuesta :
1.59 seconds
It takes 1.59 seconds for the stone to reach the ground.
a = -9.8 m/s^2
v = -9.8t -8 m/s
s = -4.9 t2 -8t +25
So… -5t^2 -8t + 25 =0,
on rearranging to 5t^2 + 8t - 25
This gives us t=1.59 seconds.
What is the gravity force?
- The force of attraction between any two objects in the universe is known as gravity or gravitational force.
- The mass of the object and the square of the distance between them determine the force of attraction.
- The weakest known force in nature, it is by far.
What is the acceleration of a stone thrown downward?
- As a result, the acceleration vector is that caused by gravity and it always has the same size and heading.
- In both the uphill and descending halves of the motion, it has a magnitude of 9.80 m/s2 and points downward.
What would happen to the downward-directed stone's velocity?
- Similar to how the acceleration brought on by gravity is negative and downward, the starting velocity is also negative.
- Given that the rock will keep descending, we anticipate the final velocity to be negative.
To learn more about gravity visit:
https://brainly.com/question/13810323
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