Will a Projectile Hit a Falling Target If Fired Simultaneously?

• LastBloomingFlower
In summary: Therefore, the safe distance from the western shore would be approximately 424 m. In summary, these are two problems involving projectile motion where the x and y components of the motion are independent of each other. For the first problem, the projectile will hit the target when it catches up to it. For the second problem, the safe distance from the western shore can be found by using trigonometry and the range formula.
LastBloomingFlower
I started out drawing pictures and I can't get any farther...

50. In a very popular lecture demonstration, a projectile is fired @ a falling target. The projectile leaves the gun the same instant that the target is dropped from rest. Assuming that the gun is initially aimed at the target, show that the projectile will hit the target.

51. An enemy ship is on the east dide of a mountainous island. The enemy ship can maneuver to within 2500 m of a the 1800-m high mountain peak and can shoot projectiles with an initial speed of 250 m/s. If the western shoreline is horizontally 300 m from the peak, what are the distances from the western shore at which a ship can be arfe from the bombardment of the enemy ship?

I'm sure you know that the x and y components of the motion of a projectile are independent of each other. Try applying this idea to both of these problems.

Dorothy

For 50, both the projectile and the target are accelerating at g. When the projectile catches up to the target, they will have fallen the same vertical distance

Any help for 51?

With trig, find the minimum angle the ship can shoot from. Then use the range formula to find the possible distances

50. Try this: Set the positional equations up for both objects in the same coordinate system. Choose the y-axis going through the object that drops straight down. Then show that when the x-coordinate of the object with the projectile motion is zero the y-coordinates of both are the same.

51. The peak is at an elevation of $$35.8^o$$ with respect to the enemy ship. This means that the safe distance will be just beyond the maximum range of the enemy ship, which is obtained when the enemy ship fire at an angle of $$45^o$$.

Last edited:

1. What is projectile motion?

Projectile motion is the motion of an object through the air, where the only force acting on it is gravity. It follows a curved path known as a parabola.

2. What factors affect projectile motion?

The factors that affect projectile motion include initial velocity, angle of launch, air resistance, and gravitational force.

3. How does projectile motion differ from regular motion?

Unlike regular motion where an object moves in a straight line, projectile motion involves both horizontal and vertical motion, resulting in a curved path.

4. How is projectile motion calculated?

The motion of a projectile can be calculated using equations of motion, such as the kinematic equations, along with the values of initial velocity, angle of launch, and time.

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

Some examples of projectile motion in everyday life include throwing a ball, shooting a basketball, and launching a rocket into space.

• Introductory Physics Homework Help
Replies
4
Views
892
• Introductory Physics Homework Help
Replies
1
Views
1K
• Introductory Physics Homework Help
Replies
3
Views
3K
• Introductory Physics Homework Help
Replies
15
Views
2K
• Introductory Physics Homework Help
Replies
3
Views
2K
• Introductory Physics Homework Help
Replies
3
Views
1K
• Mechanics
Replies
4
Views
1K
• Introductory Physics Homework Help
Replies
2
Views
3K
• Introductory Physics Homework Help
Replies
3
Views
2K
• Introductory Physics Homework Help
Replies
2
Views
4K