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A body is projected from the ground with some angle to the horizontal. What happens to the angular momentum about the initial position in this motion?
When a body is projected from the ground at an angle to the horizontal, its angular momentum about the position of projection changes as it moves through its entire flight. At first, the body has angular momentum, depending on its speed and the distance between the point of projection and its centerRead more
When a body is projected from the ground at an angle to the horizontal, its angular momentum about the position of projection changes as it moves through its entire flight. At first, the body has angular momentum, depending on its speed and the distance between the point of projection and its center of mass, respectively. However, as the body continues through its trajectory, gravitational forces are applied. The weight of the body creates a torque about the point of projection, which affects its angular momentum.
As the body rises, the vertical component of its velocity decreases due to gravity, and it eventually reaches its maximum height before descending. During this time, the torque exerted by gravity continuously alters the angular momentum. Since the gravitational force always acts vertically downward through the centre of mass, the distance between line of action of gravitational force and pivot changes due to motion. Therefore, a loss of angular momentum occurs due to rotation at the original axis. All the angular momentum is reduced during this whole course of motion in the projected body due to both gravitational torque as well as displacement of the moving body with the pivot point.
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See lessWhich is a vector quantity?
Angular momentum is a concept in physics classed as a vector quantity because of its dual nature of having magnitude as well as direction; it is associated with the rotation of an object and can be thought of as the amount of motion that a body possesses while rotating about an axis. In contrast, woRead more
Angular momentum is a concept in physics classed as a vector quantity because of its dual nature of having magnitude as well as direction; it is associated with the rotation of an object and can be thought of as the amount of motion that a body possesses while rotating about an axis. In contrast, work and potential energy are scalar quantities, which have only magnitude and no direction; they can give no information about the rotational properties of a system.
To illustrate further, work is the transfer of energy when a force is applied over a distance, whereas potential energy describes the stored energy of an object based on the position in a gravitational field. Similarly, electric current is also a scalar quantity quantifying the flow of electric charge in a circuit.
Angular momentum plays a very crucial role in many physical scenarios that explain the dynamics of rotating bodies, such as planets, spinning tops, and wheels. In an isolated system, it remains conserved, which means that the total angular momentum will not change unless acted upon by an external torque. The conservation principle is important for predicting the behavior of rotating systems both in classical and modern physics.
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See lessWhy should players maintain a low dribble height?
Maintaining a low dribble height ensures better ball control and makes it challenging for defenders to intercept. Dribbling below waist level reduces the time the ball stays airborne, minimizing risks of turnovers. This technique also provides players with greater flexibility to react to defensive pRead more
Maintaining a low dribble height ensures better ball control and makes it challenging for defenders to intercept. Dribbling below waist level reduces the time the ball stays airborne, minimizing risks of turnovers. This technique also provides players with greater flexibility to react to defensive pressure while keeping possession. Correct answer: (B) To avoid defenders.
See lessWhat improves shooting accuracy in handball?
Shooting accuracy in handball relies on proper technique, especially snapping the wrist during release. This action imparts spin to the ball, ensuring better control and precision while targeting the goal. Combined with body alignment and balance, a wrist snap enhances the effectiveness of every shoRead more
Shooting accuracy in handball relies on proper technique, especially snapping the wrist during release. This action imparts spin to the ball, ensuring better control and precision while targeting the goal. Combined with body alignment and balance, a wrist snap enhances the effectiveness of every shot, making it more challenging for defenders to block. Correct answer: (A) Wrist snap at release.
See lessWhat should a player aim for while passing in handball?
In handball, the ideal target for passing is a teammate's torso. Aiming here makes the pass easier to catch and allows the recipient to transition quickly into dribbling or shooting. This precise targeting improves team coordination and minimizes the chances of turnovers. Accurate passes at torso leRead more
In handball, the ideal target for passing is a teammate’s torso. Aiming here makes the pass easier to catch and allows the recipient to transition quickly into dribbling or shooting. This precise targeting improves team coordination and minimizes the chances of turnovers. Accurate passes at torso level ensure smooth and effective gameplay. Correct answer: (B) Teammate’s torso.
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