When is initial velocity zero

If displacement is 0, does that mean initial velocity equals final velocity? Ask Question. Asked 9 months ago. Active 9 months ago. Viewed 1k times. Improve this question. Pro Grammar Pro Grammar 33 5 5 bronze badges. Add a comment. Active Oldest Votes. Improve this answer.

John Darby John Darby 3, 2 2 gold badges 8 8 silver badges 14 14 bronze badges. Edit: after the change of the post the situation now refers to constant acceleration but along a closed path you end up where you started.

AccidentalTaylorExpansion AccidentalTaylorExpansion 9, 1 1 gold badge 18 18 silver badges 45 45 bronze badges. When you move in a circle the term 'distance travelled' would be more correct. The kinematic equations are meant for straight line travel because it simplifies things a lot. After all, the inertial mass is non-zero for any object and conserved, so it is only needed when the objects split and merge. No packages or subscriptions, pay only for the time you need.

I am guessing it has something to do forces but im not sure. Add comment. You don't have to start with everything at rest. The animation at the right depicts this by means of a vector arrow. Acceleration is in the direction of the change in velocity, which points directly toward the center of rotation—the center of the circular path. This direction is shown with the vector diagram in the figure.

When a body starts from rest or it changes it direction of motion,it is called as initial velocity. Although mass has no effect on the acceleration due to gravity, there are three factors that do.

They are location, location, location. Objects that are said to be undergoing free fall, are not encountering a significant force of air resistance; they are falling under the sole influence of gravity. The horizontal velocity remains constant, but the vertical velocity varies linearly, because the acceleration is constant. We can use the displacement equations in the x and y direction to obtain an equation for the parabolic form of a projectile motion:.

Using this we can rearrange the velocity equation to find the time it will take for the object to reach maximum height. From the displacement equation we can find the maximum height. Using this we can rearrange the parabolic motion equation to find the range of the motion:. Range of Trajectory : The range of a trajectory is shown in this figure.

Projectiles at an Angle : This video gives a clear and simple explanation of how to solve a problem on Projectiles Launched at an Angle. I try to go step by step through this difficult problem to layout how to solve it in a super clear way. Best wishes. Tune into my other videos for more help. In projectile motion, an object moves in parabolic path; the path the object follows is called its trajectory.

We have previously discussed projectile motion and its key components and basic equations. Using that information, we can solve many problems involving projectile motion. Projectile motion is when an object moves in a bilaterally symmetrical, parabolic path.

Projectile motion only occurs when there is one force applied at the beginning, after which the only influence on the trajectory is that of gravity. Refer to for this example.

If the object is to clear both posts, each with a height of 30m, find the minimum: a position of the launch on the ground in relation to the posts and b the separation between the posts. Diagram for Example 1 : Use this figure as a reference to solve example 1.

The problem is to make sure the object is able to clear both posts. Since the motion is in a parabolic shape, this will occur twice: once when traveling upward, and again when the object is traveling downward. We can use the quadratic equation to find that the roots of this equation are 2s and 3s.

This means that the projectile will reach 30m after 2s, on its way up, and after 3s, on its way down. Diagram for Example 2 : When dealing with an object in projectile motion on an incline, we first need to use the given information to reorient the coordinate system in order to have the object launch and fall on the same surface. Solution: In order to account for the incline angle, we have to reorient the coordinate system so that the points of projection and return are on the same level.

Projectile motion is a form of motion where an object moves in a parabolic path. The path followed by the object is called its trajectory.

Projectile motion occurs when a force is applied at the beginning of the trajectory for the launch after this the projectile is subject only to the gravity.