"Special Topic Strengthening the Application of the Laws of Flat Throwing Motion" Projectile Motion PPT High-Quality Courseware

Description

"Special Topic Strengthening the Application of the Laws of Flat Throwing Motion" Projectile Motion PPT High-Quality Courseware

Knowledge expansion

Expansion point 1: Two corollaries of flat throwing motion

Corollary 1: Starting from the throwing point, the tangent value of the velocity deflection angle at any time is equal to twice the tangent value of the displacement deflection angle, as shown in the figure.

Corollary 2: Starting from the throwing point, the reverse extension line of the velocity at any time passes through the midpoint of the horizontal displacement. as the picture shows.

[Examination Cases]

[Example 1] The picture shows the trajectory of an object being thrown horizontally. The object is thrown from point O. x and y represent its horizontal and vertical partial displacements respectively. At a certain point P(x0, y0) during the motion of the object, the reverse extension line of its velocity vP intersects the x-axis at point A (point A is not drawn). Then the length of OA is ()

A.x0 B.0.5x0 C.0.3x0 D. Not sure

[For Training 1] As shown in the figure, a small ball is thrown from the top of a fixed inclined plane with a self-tilt angle of θ in the horizontal direction and then lands on the inclined plane. When the ball contacts the inclined plane, the velocity direction is between the horizontal direction and the vertical direction. The angle φ satisfies ()

A.tan φ＝sin θ B.tan φ＝cos θ

C.tan φ＝tan θ D.tan φ＝2tan θ

Expansion point 2: Critical issues related to flat throwing motion

Analytical Methods for Critical Problems

1. Decomposing the flat throwing motion into uniform linear motion in the horizontal direction and free falling motion in the vertical direction is the basic method to solve the flat throwing motion.

2. When analyzing critical problems in flat throw motion, the method of limit analysis is generally used, that is, setting the required physical quantities to a maximum or minimum to highlight the critical problems and find out the critical conditions.

3. Determine the critical state and draw a schematic diagram of the trajectory.

4. Pay attention to the appropriate use of mathematical knowledge to analyze and solve critical and extreme value problems.

Expansion point 3: Flat throwing motion related to the inclined plane

1. Problem-solving skills of flat throwing motion

(1) To solve the problem of landing point position, it is generally necessary to establish the relationship between horizontal displacement and vertical displacement.

(2) To solve the problem of the direction of the landing point velocity, that is, the direction of the terminal velocity, it is generally necessary to establish the relationship between the horizontal velocity and the vertical velocity.

(3) Pay attention to exploring and utilizing the geometric relationships between combined motion, partial motion and problem setting situations.

2. Three types of breakthroughs in solving problems of flat throwing motion

(1) If the horizontal displacement and horizontal velocity are known, the x=v0t equation can be used as a breakthrough to solve the problem.

Expansion point four: flat throwing motion

1. Characteristics of flat throwing motion

(1) Sometimes the motion of an object is very similar to that of a flat throw. The object also moves in a straight line with uniform speed in a certain direction, and moves in a uniformly accelerated straight line with an initial velocity of zero in the direction perpendicular to the straight line motion at a constant speed. This kind of motion that looks like a flat throw but is not a flat throw is usually called a flat throw-like motion.

(2) Force characteristics: The resultant force on the object is a constant force and is perpendicular to the direction of the initial velocity.

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For more information about the PPT courseware "Projectile Motion Special Topic Strengthens the Application of the Laws of Flat Throwing Motion", please click on the Projectile Motion PPT Special Topic Strengthens the Application of the Flat Throwing Motion PPT tag.

"Special Topic Strengthening the Application of the Laws of Flat Throwing Motion" Excellent Courseware of Projectile Motion PPT:

"Special Topic Strengthening the Application of the Laws of Flat Throwing Motion" Excellent Courseware of Projectile Motion PPT Part One Content: Learning Objectives 1. Be able to skillfully use the laws of flat throwing motion to solve problems. 2. Be able to analyze problems that combine flat throwing motion with other motions. 3 .Can analyze motion similar to flat throw...

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Update Time: 2024-10-20

This template belongs to Physics courseware People's Education Press High School Physics Compulsory Course II industry PPT template

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