Solving Projectile Motion: Finding Initial Velocity and Distance

In summary, the problem involves finding the initial horizontal velocity of a ball that rolls off a cliff 1.5 m high and lands 3 m away from the edge. This can be solved by combining the equations u_horizontal *t = 3 and 1.5 = 0*t+(1/2)*g*t^2.
  • #1
physics_challenged
4
0
Hi, can someone please tell me how to figure out the initial (horizontal) velocity of a ball that rolls horizontally off a cliff at a height of 1.5 m from the ground, and lands 3 m away from the edge of the cliff?
 
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  • #2
u_horizontal *t = 3
1.5 = 0*t+(1/2)*g*t^2

-- AI
 
  • #3
How long does the ball take to reach the ground? How fast does it have to travel horizontally to be 3 m out in that time?
 
  • #4
Tide said:
How long does the ball take to reach the ground? How fast does it have to travel horizontally to be 3 m out in that time?


The problem is...the question doesn't give the time or speed. :cry:
 
  • #5
You can always combine equations.
 
  • #6
TenaliRaman said:
u_horizontal *t = 3
1.5 = 0*t+(1/2)*g*t^2

-- AI

Yes, that worked. Thanks a bunch! :smile:
 

1. What is projectile motion?

Projectile motion is the motion of an object that is launched into the air and then moves along a curved path under the influence of gravity.

2. How is projectile motion calculated?

Projectile motion is calculated using the equations of motion, which take into account the initial velocity, the angle of launch, and the acceleration due to gravity.

3. What are the key factors that affect projectile motion?

The key factors that affect projectile motion include the initial velocity, the angle of launch, the mass of the object, and the air resistance or drag on the object.

4. How does air resistance impact projectile motion?

Air resistance, or drag, can affect the motion of a projectile by slowing it down and changing its trajectory. This is particularly noticeable for objects with a large surface area, such as feathers or parachutes.

5. What are some real-life examples of projectile motion?

Some real-life examples of projectile motion include throwing a ball, shooting a cannonball, and jumping off a diving board. These all involve an object being launched into the air and moving along a curved path under the influence of gravity.

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