- #1
kaspis245
- 189
- 1
Homework Statement
I need to find velocity v from the drawing.
Homework Equations
Equations of kinematics
The Attempt at a Solution
I found that v=12.134 m/s . I need to know is it correct.
[/B]
Delta means this:in order to find your time for s2, you find the time it takes to fall a distance h under gravity with an initial velocity (in the y direction) of zero. This will give you the wrong time. You need to account for the initial vertical velocity. Think: which takes longer to hit the ground: a ball shot straight forward or a ball shot upward at an initial positive angle above the horizontal?paisiello2 said:I get a different answer.
Maybe you can verbally explain your reasoning?
Kinematics in two dimensions is a branch of physics that deals with the motion of objects in two-dimensional space. It involves analyzing the position, velocity, and acceleration of an object as it moves in a horizontal and vertical direction.
The basic equations used in kinematics in two dimensions are the equations of motion, including the displacement equation (Δx = xf - xi), the average velocity equation (v = Δx/Δt), and the average acceleration equation (a = Δv/Δt).
To calculate the horizontal and vertical components of velocity and acceleration, you can use trigonometric functions such as sine and cosine. The horizontal component of velocity is calculated using vx = v cosθ, while the vertical component is vy = v sinθ. Similarly, the horizontal component of acceleration is ax = a cosθ, and the vertical component is ay = a sinθ.
Yes, kinematics in two dimensions can be used to solve real-world problems such as predicting the trajectory of a projectile, calculating the motion of objects in a roller coaster, or analyzing the flight path of a plane. By using the equations of motion and understanding the horizontal and vertical components of velocity and acceleration, we can accurately predict and analyze the motion of objects in two-dimensional space.
One common misconception is that objects always move in a straight line in two dimensions. In reality, objects can also move in curved paths, such as in circular motion or projectile motion. Another misconception is that acceleration is always constant in two dimensions, when in fact it can change depending on the forces acting on an object. Additionally, many people believe that the horizontal and vertical components of motion are independent of each other, but they are actually connected through the object's overall velocity and acceleration.