Finding Time when throwing an object up

  • Thread starter SunKissedGal1
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In summary, the conversation discusses how to calculate the time it takes for a ball thrown from the top of a 55 meter high building with an initial speed of 35 m/s to hit the ground. The suggested equations are v= at + vo and d=vot +1/2at^2, and it is mentioned that figuring out the height the ball will reach can help determine the total time it takes to hit the ground. The final equation mentioned is 2ad = vf^2-vi^2.
  • #1
SunKissedGal1
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Homework Statement



Standing on the top ledge of a 55 meter high building you throw a ball straight up with an initial speed of 35 m/s. How long, to the nearest second, does it take to hit the ground?

Homework Equations



v= at + vo

The Attempt at a Solution



i think I am using the wrong equation...
X= 55
V= 35
a=9.8
t=?
 
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  • #2
Try using: d=vot +1/2at2
 
  • #3
Maybe if you figured how high it would go you could figure how long it will take to hit the ground from that total height? And then that added to how long it took to get to that height would be your total time wouldn't it?
 
  • #4
LowlyPion said:
Maybe if you figured how high it would go you could figure how long it will take to hit the ground from that total height? And then that added to how long it took to get to that height would be your total time wouldn't it?

Right, you would need, 2ad = vf2-vi2
 

What is the formula for finding the time when throwing an object up?

The formula for finding time when throwing an object up is t = (v0 sinθ)/g, where t is the time, v0 is the initial velocity, θ is the angle of launch, and g is the acceleration due to gravity.

How does the angle of launch affect the time of flight?

The angle of launch affects the time of flight because it determines the initial vertical and horizontal velocities of the object. A higher angle of launch will result in a shorter time of flight compared to a lower angle of launch.

What is the relationship between initial velocity and time of flight?

The initial velocity and time of flight have a direct relationship. This means that as the initial velocity increases, the time of flight also increases. This is because a higher initial velocity will result in a longer distance traveled by the object.

Does the mass of the object affect the time of flight?

No, the mass of the object does not affect the time of flight. This is because the equation for time of flight does not include mass. However, the mass of the object can affect the initial velocity and therefore indirectly affect the time of flight.

How does air resistance affect the time of flight?

Air resistance can affect the time of flight by slowing down the object's velocity. This is because air resistance acts as a force in the opposite direction of the object's motion, causing it to slow down. Therefore, the object will take longer to reach its maximum height and fall back down, resulting in a longer time of flight.

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