Projectile Motion Question with Components

In summary: This would give you the distance from the muzzle to where the shell will first land. In summary, decreasing the firing angle of the howitzer will increase the range of the shell. To determine the total time for the shell to hit the ground, you would need to use the time it takes for the shell to reach its max height and double it. To determine where the shot will first land, you would use the equation x = Vxo*T, where x is the distance traveled in the horizontal direction and T is the total time for the shell to hit the ground.
  • #1
electriceel
4
0
Question Reads:
An artillery unit has a 105 mm howitzer with shells that leave the muzzle at Velocity 472 m/s. Firepower fixed but angle at which it is fired (60[tex]\circ[/tex]) is not. A What should you do? Increase or decrease the angle? B As an artillery officer in physics training, where di the shot first land? determine time shell takes to reach max height and use that to figure out total time for shell to hit the ground


For A I know I have to decrease the angle, why? Not sure. Here's what I did for A

Vxo = 472 cos 60 = 236 m/s
Vyo = 472 sin 60 = 409 m/s

[tex]\theta[/tex] = 30[tex]\circ[/tex]


B Time, Using 10 as g: Vy = Vyo - gT --> 0=409 - 10T ---> T= 40.9 seconds to max height.

And then I have no idea where to go from there.

 
Physics news on Phys.org
  • #2
For A: Decreasing the angle of the howitzer will increase the range of the shell, because a lower angle means that the shell will have an increased horizontal velocity, allowing it to travel farther. For B: The total time for the shell to hit the ground is equal to twice the time it takes to reach its max height. In this case, the total time for the shell to hit the ground would be 81.8 seconds. To determine where the shot will first land, you would need to use the equation: x = Vxo*T, where x is the distance traveled in the horizontal direction and T is the total time for the shell to hit the ground.
 
  • #3


I would like to clarify that the information provided in the question is insufficient to accurately determine the correct angle at which the howitzer should be fired. The angle at which the howitzer should be fired depends on various factors such as the desired range, the elevation of the target, and the wind speed and direction. Therefore, a more comprehensive analysis and calculation is needed to accurately determine the optimal angle for firing the howitzer.

To answer the first question (A), whether to increase or decrease the angle, it is important to consider the range and elevation of the target. In general, a higher angle of elevation will result in a longer range, while a lower angle will result in a shorter range. However, if the target is at a higher elevation, a lower angle may be more effective. Therefore, it is crucial to have more information about the target and the surrounding conditions before determining the optimal angle.

For the second question (B), to determine where the shot will first land, we need to consider the projectile motion of the shell. The shell will follow a parabolic path, reaching its maximum height and then falling back down to the ground. The total time for the shell to hit the ground can be calculated by considering the time it takes to reach its maximum height and the time it takes to fall back down to the ground.

Using the equation V = V0 + at, we can calculate the time it takes for the shell to reach its maximum height by setting the final velocity (V) to zero, since the shell will momentarily stop at its maximum height. Therefore, the time taken to reach the maximum height (T) can be calculated as T = V0/g, where V0 is the initial vertical velocity of the shell and g is the acceleration due to gravity.

To determine the total time for the shell to hit the ground, we can use the equation d = V0t + 1/2at^2, where d is the distance traveled, V0 is the initial velocity, a is the acceleration, and t is the time. By setting d to the desired range and solving for t, we can determine the total time for the shell to hit the ground.

In conclusion, to accurately determine the optimal angle for firing the howitzer and to determine where the shot will first land, a more thorough analysis and calculation is needed, taking into account various factors such as the range, elevation, and surrounding conditions.
 

Related to Projectile Motion Question with Components

1. What is projectile motion with components?

Projectile motion with components is a type of motion in which an object is thrown or launched at an angle with an initial velocity. It is a combination of both horizontal and vertical motion, and can be described using both horizontal and vertical components of velocity and acceleration.

2. What are the main equations used in projectile motion with components?

The main equations used in projectile motion with components are the horizontal and vertical components of displacement, velocity, and acceleration. These equations can be derived from the kinematic equations by separating the motion into horizontal and vertical components.

3. How is the angle of launch related to the range of a projectile?

The angle of launch is directly related to the range of a projectile. The range is the horizontal distance traveled by the projectile, and it is maximized when the angle of launch is 45 degrees. This is because at this angle, the horizontal and vertical components of velocity are equal, resulting in the maximum range.

4. How does air resistance affect projectile motion with components?

Air resistance can affect projectile motion with components by slowing down the object as it travels through the air. This means that the horizontal and vertical components of velocity and acceleration will also be affected, causing a change in the trajectory and range of the projectile. In most cases, air resistance is negligible for small objects, but it can have a significant impact on larger, slower-moving objects.

5. What factors can affect the trajectory of a projectile in projectile motion with components?

The trajectory of a projectile in projectile motion with components can be affected by several factors such as the angle of launch, initial velocity, air resistance, and the presence of external forces. Additionally, the mass and shape of the object can also play a role in the trajectory of the projectile. A change in any of these factors can result in a different trajectory for the projectile.

Similar threads

  • Introductory Physics Homework Help
Replies
6
Views
1K
  • Introductory Physics Homework Help
Replies
4
Views
899
  • Introductory Physics Homework Help
Replies
11
Views
855
Replies
5
Views
2K
Replies
3
Views
3K
  • Introductory Physics Homework Help
Replies
3
Views
1K
  • Introductory Physics Homework Help
Replies
8
Views
2K
  • Introductory Physics Homework Help
Replies
7
Views
2K
  • Introductory Physics Homework Help
Replies
1
Views
1K
  • Introductory Physics Homework Help
Replies
15
Views
21K
Back
Top