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A projectile moves in a parabolic path without air resistance is there any point at which acceleration is parallel to velocity?
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Is there any point along the path of projectile where velocity and acceleration vectors are parallel to each other?
no
When is velocity parallel to acceleration?
Explain circumstances, in which the velocity acceleration of a body is parallel?
Is there any point along the path of projectile where velocity and acceleration vectors are perpendicular to each other?
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.
Explain the circumstances in which the velocity and acceleration of the body is parallel?
the acceleration of the car is increasind.Then the v and a are parallel to each other.
What is the ratio of equivalent resistance of series and parallel combination of n equal resistance to the equivalent resistance on parallel combination?
1
Is there any point along the path of projectile where velocity and acceleration vectors are parallel to each other?
no
When is velocity parallel to acceleration?
Explain circumstances, in which the velocity acceleration of a body is parallel?
How is resistivity connected to resistance?
Resistance is connected in parallel with voltmeter or say, voltmeter is connected in parallel with resistance.
Is there any point along the path of projectile where velocity and acceleration vectors are perpendicular to each other?
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.
Explain the circumstances in which the velocity and acceleration of the body is parallel?
the acceleration of the car is increasind.Then the v and a are parallel to each other.
What is the ratio of equivalent resistance of series and parallel combination of n equal resistance to the equivalent resistance on parallel combination?
1
Explain the circumstances when the acceleration and the velocity of car are parallel?
when velocity of a car is increasing then velocity and acceleration are parallel to each other.
Why the parabolic antenna has parabola shape?
Parallel rays, such as those from a very distance source, are focussed by a parabolic antenna so that they all meet at the focus of the parabola. This results in a stronger signal.
Why is resistance less when resistors are join in parallel?
What do you mean? In a parallel circuit, the combined (or effective) resistance is less than any individual resistance.
How do you construct a hyperbolic paraboloid roof?
by creating two planes such that one parallel is hyperbolic and the other parabolic
A piece of copper wire was cut into n equal parts these parts are connected in parallel how will the resistance of the parallel combination compare with the resistance of the wire?
The resulting resistance of the parallel combination will be the resistance of the original wire divided by n squared.
How do you build a parabolic mirror?
A parabolic mirror is shaped such that parallel incident light is reflected to a point called the focus. You will have to establish the size required, and the shape. There is an entry in Wikipedia on Parabola, giving the algebra.
