How High and How Long Does a Volleyball Go When Hit Upwards?

In summary, Stephanie hits a volleyball from a height of 0.8m with an initial velocity of 7.5m/s straight up. The equation d=vit+1/2 at^2 can be used to find the height of the ball, while v = vi + a*t can be used to determine the time it takes for the ball to reach its maximum height. By setting v=0 at maximum height, we can solve for t and plug it back into the first equation to find the maximum height. The attempt of using vf^2= 7.5^2+2(-9.81)(.8) is incorrect.
  • #1
inedhelpinphy
6
0

Homework Statement



Stephanie hits a volleyball from a height of 0.8m and gives it an initial velocity of 7.5m/s straight up.?
a. how high will the volleyball go?
b. how long will it take the ball to reach its maximum height? (hint:@ max height, v= 0m/s)

Homework Equations



im not sure but maybe d=vit+1/2 at^2

The Attempt at a Solution



tried a lot of things :/
 
Physics news on Phys.org
  • #2
d=vit+1/2 at^2 is good, but you also need v = vi + a*t so you can take advantage of that hint about the v being zero at maximum height.
 
  • #3
Show your attempts.
 
  • #4
tyvm! i think you use vf=vi+at to find how high it will go ?
 
  • #5
rl.bhat said:
Show your attempts.

i did vf^2= 7.5^2+2(-9.81)(.8)
im not sure if its how you do this
 

FAQ: How High and How Long Does a Volleyball Go When Hit Upwards?

What is the "Falling Object problem"?

The Falling Object problem, also known as the Free Fall problem, is a physics problem that involves analyzing the motion of an object as it falls under the influence of gravity without any additional forces acting on it.

What are the key equations used to solve the Falling Object problem?

The key equations used to solve the Falling Object problem are the equations of motion, specifically the equation for acceleration due to gravity (a = -9.8 m/s^2) and the equation for displacement (d = vi*t + (1/2)*a*t^2).

How does air resistance affect the motion of a falling object?

Air resistance, also known as drag, can significantly affect the motion of a falling object. As an object falls, it experiences an upward force from air resistance that increases with velocity. This can cause the object to reach a terminal velocity, where the upward force of air resistance equals the downward force of gravity, resulting in a constant velocity.

What factors can impact the time it takes for a falling object to reach the ground?

The time it takes for a falling object to reach the ground can be impacted by factors such as the initial height of the object, the mass and shape of the object, air resistance, and the strength of the gravitational force at the location of the fall.

How is the Falling Object problem used in real-world applications?

The Falling Object problem is used in various real-world applications, such as designing parachutes and skydiving equipment, calculating the trajectory of a falling object in sports like rock climbing or skateboarding, and understanding the motion of objects in free fall during space missions. It is also used in safety measures, such as designing safety nets or calculating the safe height for bungee jumping.

Similar threads

Back
Top