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Suppose you tie a rock to a string and spin it in a vertical plane In what direction will the rock move if the string breaks exactly when the rock has passed the lowest point and is in a horizontal?
Wiki User
∙ 13y ago
It goes horizontally. The string is the only force that is keeping the rock from going in a straight line (the rock will go in a straight line in the absence of a force because of its "inertia") Thus, if the force is removed when the rock's instantaneous velocity is horizontal, it will continue to travel horizontally thereafter (in the absence of gravity, another force)..
Wiki User
∙ 13y ago
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Is it possible for a body moving with a uniform speed to have acceleration?
Yes. This is exactly the case when an object is thrown on the surface of the Earth. Consider an (American) football thrown in the air. This ball has the force of gravity accelerating it downward, but there is no force acting on it horizontally, thus there is no acceleration horizontally. As a result, since acceleration is the rate of change in velocity, the velocity in the vertical direction is changing, whereas the velocity in the horizontal direction is not.
Discuss the motion of a body thrown from a certain height?
Ignoring air resistance, for simplicity:* The horizontal component of the velocity (if you give it an initial thrust in any direction that is not exactly down or up) will remain unchanged, until the object touches the ground. * The vertical component of the velocity will change at a rate of about -9.8 meters per second square (assuming you define positive numbers to mean upwards).
Why would a small pebble sink and a steel ship float?
Well, its not the steel in the ship that floats exactly, its the oxygen contained in the ship, the more water something displaces means the more water is pushing it in horizontal direction. and because of the shapes of ships causes it to be pushed up.
Velocity is the change of speed andor direction of an object?
Not exactly. Velocity is the speed and direction of an object's motion.If either speed or direction changes, then the change is the object's 'acceleration'.
What is negative vector in physics?
That's a vector whose direction is exactly opposite to the direction that you designated as the positive one when the exercise or analysis began.
Exactly vertical or perpendicular?
There is no such thing as exactly vertical because either it is vertical or it is not. You cannot have approximately vertical - it is not vertical, then. Vertical means at 90 degrees to the horizon (or horizontal).
What are not horizontal and vertical lines?
Any line that is not running exactly straight up and down is not vertical. Any line that is not running exactly flat, left to right is not horizontal. Vertical and horizontal lines are always at 90 degrees to each other.
Is it true that The slope of a flat line should be exactly 0?
Depends on whether it is vertical or horizontal. If it is vertical, it is undefined. If it is horizontal, it is zero.
Does the buoyant force act in all directions?
Yes, but any bit of force in any horizontal direction is always exactly cancelled by an equal-size bit of force in the opposite horizontal direction, so there's never a NET horizontal buoyant force. It's only apparent in the upward vertical direction.
Is any horizontal line perpendicular to any vertical line?
Yes, but only if they are exactly vertical and exactly horizontal (90 degrees angular difference). For real-world examples, many vertical lines can be perpendicular to a single "horizontal" curved line at the points of intersection.
Does a spirit level tell us if things are horizontal?
If the bubble is exactly centered the level is horizontal (or vertical if it is one of those)
Does a rectangle or square have exactly 2 lines of symmetry?
Technically, a square is a rectangle with four lines of symmetry. A non-square rectangle has exactly two lines of symmetry: the vertical and the horizontal.
What is the Difference between polar and equatorial diameter of earth?
polar dia is vertical one and equatorial is the horizontal one..............there is a difference as earth is not exactly round right?
How do you pass the dashes on the wall on nabooti island?
Press each of the vertical lines (|-) exactly once, and all four lines will go to horizontal (----). Now you can walk over the scorpion pit.
Where is the zenith on a globe?
Everywhere. The zenith at a given point is the local vertical direction pointing away from the direction of the force of gravity at that location. In other words it is the point that is exactly straight up, no matter where you are on earth's surface.
What do you use to determine if a surface is exactly horizontal?
dc
Is projectile motion a motion in one-dimension-the direction of gravity?
No. Neglecting air resistance, the projectile follows a parabola. The horizontal distance is proportional to 'time', and the vertical distance is proportional to 'time squared'. This is exactly the description of a parabola.
