Vertical throw initial height 15 time 3s until hiting ground

In summary, the conversation is about finding the initial speed of a ball and the time it takes for the ball to hit the ground after being thrown upwards. The person is using the formulas d=v_initial*t-0.5*g*t^2 and v=v_initial+g*t to try and solve the problem. They are asking for help in understanding how to find the initial speed and at what time the ball will reach a height of 15m again. The person responding suggests that they need to use quadratic equations to solve the problem and asks for the person to share their progress so far.
  • #1
Justas
1
0

Homework Statement


Height - 15m
Time when ball hits the ground after upward throw 3 s.

I have been trying to find intitial speed with these formulas :
d=v_initial*t-0.5*g*t^2
and
v=v_initial+g*t

Please help to understand how to find initial speed and after what time the ball is at 15m height again.
 
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  • #2
Justas said:

Homework Statement


Height - 15m
Time when ball hits the ground after upward throw 3 s.

I have been trying to find intitial speed with these formulas :
d=v_initial*t-0.5*g*t^2
and
v=v_initial+g*t

Please help to understand how to find initial speed and after what time the ball is at 15m height again.

You need to post what you've done. Hint: what do you know about quadratic equations?
 

FAQ: Vertical throw initial height 15 time 3s until hiting ground

What does the term "vertical throw" mean?

The term "vertical throw" refers to the motion of an object being thrown directly upwards or downwards, with no horizontal movement.

What is the initial height in a vertical throw?

The initial height is the starting height of the object when it is first thrown. In this case, the initial height is 15 units.

How is time measured in a vertical throw?

In a vertical throw, time is measured in seconds (s). This is the standard unit of measurement for time in physics.

How long does it take for the object to hit the ground?

The object will hit the ground after 3 seconds (s) in this scenario. The time it takes for an object to fall to the ground is affected by the force of gravity and the initial height of the object.

What factors affect the height and time of a vertical throw?

The height and time of a vertical throw are affected by the initial height, the force of gravity, and any external forces acting on the object. The mass and shape of the object may also play a role in its trajectory.

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