Using the term "trajectory" implies that the acceleration you are concerned about is due to gravity. Gravity will always be perpendicular to the surface. Unless the trajectory begins perpendicular to the surface, it will never change to become perpendicular and the velocity will never be in a direction parallel to the acceleration. If it starts perpendicular to the surface it will start and remain perpendicular.
Of course if you have another force acting on the object - such as wind - the component of the velocity vector parallel to the ground could be reduced to zero and at that point the only remaining component of the velocity vector would be that perpendicular to the ground and parallel to the acceleration.
Likewise if the object is being propelled by an engine or rocket, the trajectory could be parallel to the force any time the acceleration vector became parallel to the velocity vector.
Yes, at the highest point of the projectile's trajectory, the velocity and acceleration vectors are parallel to each other. This is because the velocity is momentarily zero, and the acceleration due to gravity is acting vertically downward, pointing in the same direction as the velocity.
One physical example of a vector perpendicular to its derivative is angular momentum in the case of rotational motion. The angular momentum vector is perpendicular to the angular velocity vector, which is the derivative of the angular displacement vector. Another example is velocity and acceleration in circular motion, where velocity is perpendicular to acceleration at any given point on the circular path.
Velocity and acceleration are both vectors because they have both magnitude and direction. Velocity is the rate of change of an object's position, while acceleration is the rate of change of an object's velocity. The direction of the velocity vector indicates the direction in which the object is moving, while the direction of the acceleration vector indicates the direction in which the velocity is changing.
An object with a constant acceleration and velocity in the same direction will have both vectors pointing in the same direction. This occurs when an object is moving in a straight line with a constant speed while its velocity is also increasing at a constant rate.
No, velocity and acceleration are not the same. Velocity is the rate of change of an object's position with respect to time, while acceleration is the rate of change of an object's velocity with respect to time. In other words, acceleration measures how quickly an object's velocity is changing.
Yes, at the highest point of the projectile's trajectory, the velocity and acceleration vectors are parallel to each other. This is because the velocity is momentarily zero, and the acceleration due to gravity is acting vertically downward, pointing in the same direction as the velocity.
One physical example of a vector perpendicular to its derivative is angular momentum in the case of rotational motion. The angular momentum vector is perpendicular to the angular velocity vector, which is the derivative of the angular displacement vector. Another example is velocity and acceleration in circular motion, where velocity is perpendicular to acceleration at any given point on the circular path.
Velocity and acceleration are both vectors because they have both magnitude and direction. Velocity is the rate of change of an object's position, while acceleration is the rate of change of an object's velocity. The direction of the velocity vector indicates the direction in which the object is moving, while the direction of the acceleration vector indicates the direction in which the velocity is changing.
Force, velocity, acceleration, and displacement are vectors. Mass, temperature, time, cost, and speed are scalars (not vectors).
An object with a constant acceleration and velocity in the same direction will have both vectors pointing in the same direction. This occurs when an object is moving in a straight line with a constant speed while its velocity is also increasing at a constant rate.
Both velocity and acceleration of vectors because their magnitude is dependent on their direction. For example a velocity of 6 ft/s is different from a velocity of -6ft/s because they are in opposite directions. Like wise, an acceleration of 9.8 ft/s^2 indicates an increase in velocity while -9.8 ft/s^2 indicates a decrease in velocity.
No, velocity and acceleration are not the same. Velocity is the rate of change of an object's position with respect to time, while acceleration is the rate of change of an object's velocity with respect to time. In other words, acceleration measures how quickly an object's velocity is changing.
Typical uses of vectors include force, position, velocity, acceleration, torque, rotational movement, and others.
Physical quantities that have both magnitude and direction are considered vectors. Examples of vectors include force, velocity, acceleration, and displacement. These quantities are represented using arrows to show their direction and scale to show their magnitude.
Some common examples of vectors include force (direction and magnitude), velocity (speed and direction), displacement (distance and direction), and acceleration (change in velocity with direction).
When acceleration and velocity vectors are pointing in opposite directions, it means that the object's speed is decreasing. This situation occurs when the acceleration is acting against the direction of motion, causing the object to slow down.
Vectors can represent anything that has both magnitude and direction, like velocity, acceleration, momentum, force, etc.