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What is the acceleration of the object at the very top of its path?
Wiki User
∙ 12y ago
You haven't told us anything about the object, how fast it was launched,
whether it was launched straight up or at an agle, and on what planet this
whole event occurred. So we have to assume reasonable choices for all
of these details ... that is, make them up.
We're going to assume that it happened on Earth, the object was a Baseball,
it was launched at a speed of 17.8816 meters per second, aimed at a precise
angle of exactly (0.2718 pi) radians above the horizontal. We're also going to
ignore any effects that air resistance may have on its motion.
The acceleration of gravity on Earth is 9.8 meters (32.2 feet) per second2,
directed downward. From the instant the ball leaves your hand until it hits
the ground, that is its acceleration. All the way up, at the very top of its
path, and all the way down. No matter how big it is, how heavy it is, what
speed it was tossed with, or in what direction. Doesn't matter.
It's speed will change and depend on all of the details, and its velocity will change
and depend on all the details. But its acceleration won't.
Wiki User
∙ 12y ago
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Is 0 velocity and 0 acceleration correctly describes the velocity and acceleration of the rock at the exact top of its path?
No. Any object that was shot by gun, flung by slingshot, or thrown by hand, begins accelerating downward at the acceleration of gravity as soon as it leaves the propulsion system. Zero velocity is true at the top, but acceleration is constant throughout the trajectory ... 9.8 m/s downward.
Can an object have zero velocity and non-zero acceleration?
Yes, an object can have have zero velocity and non-zero acceleration. This happens when an object is at rest and when a force is applied on it such as gravity. But this isn't always true. A good example of another situation is when you throw an object vertically up into the air. Such an object will be acted upon by the constant acceleration of gravity. Due to this acceleration, it will slow down, then it will reverse direction, and finally it will fall back to the ground. At the exact point at the top of its path before falling back down, the object will have zero velocity. Yet it will still be accelerating towards the ground the whole time. The object is being accelerated by the force of gravity throughout its entire journey.
A vertically launched object When is the acceleration due to gravity greater when ascending from the top or descending?
As long as the object stays somewhere near the surface of the earth, the acceleration due to gravity is constant, whether the object is moving up, down, sideways, or not moving at all.
Do you agree with the statement an object with a zero velocity can have an acceleration greater than zero?
Do you agree with the statement, "An object with a zero velocity can have an acceleration greater than zero."? Explain your answer.
When an object is thrown straight up into the air what is its acceleration when it is moving upward?
The acceleration at the top of the path will be the same as the acceleration at the moment the ball leaves the hand and all the way until the moment it hits the ground (or hand). Ignoring air resistance, the only force acting on the ball is gravity. so the acceleration is 'g' or approximately 9.81m/squared seconds in my part of the world. g depends on how close the ball is to the center of the earth.
Is 0 velocity and 0 acceleration correctly describes the velocity and acceleration of the rock at the exact top of its path?
No. Any object that was shot by gun, flung by slingshot, or thrown by hand, begins accelerating downward at the acceleration of gravity as soon as it leaves the propulsion system. Zero velocity is true at the top, but acceleration is constant throughout the trajectory ... 9.8 m/s downward.
A table exerts a 4.0 kg Newton force on a book which lies at rest on its top The force exerted by the book on the table is?
An object travels in a circular path of radius 5.0 meters at a uniform speed of 10. m/s. What is the magnitude of the object's acceleration?
Can an object have zero velocity and non-zero acceleration?
Yes, an object can have have zero velocity and non-zero acceleration. This happens when an object is at rest and when a force is applied on it such as gravity. But this isn't always true. A good example of another situation is when you throw an object vertically up into the air. Such an object will be acted upon by the constant acceleration of gravity. Due to this acceleration, it will slow down, then it will reverse direction, and finally it will fall back to the ground. At the exact point at the top of its path before falling back down, the object will have zero velocity. Yet it will still be accelerating towards the ground the whole time. The object is being accelerated by the force of gravity throughout its entire journey.
A vertically launched object When is the acceleration due to gravity greater when ascending from the top or descending?
As long as the object stays somewhere near the surface of the earth, the acceleration due to gravity is constant, whether the object is moving up, down, sideways, or not moving at all.
Is there a device that can change the weight of an object?
Since weight is a function of mass and acceleration, yes, it is called an elevator, whose acceleration as you ascend to the top of a building will, for a short while, change the acceleration factor of weight, thus increasing the weight of the object. Similarly, a rocket will first greatly increase the acceleration, but as it gets further away from the earth, and stops accelerating, the acceleration will drop below that of earths surface, which is 9.8 meters per second, per second. Changing the mass (typically what people think of when they think of weight.) of the object on the other hand, requires somehow changing the form of the object.
When an object is thrown straight up at the highest point the downward velocity is?
A rock has the same constant acceleration from the moment it leaves your hand until the moment it hits the ground. It doesn't matter whether you dropped it or threw it, or in what direction it left you. The acceleration is 9.8 meters (32.2 feet) per second2 directed downwards. That's the acceleration of gravity on earth. As you asked, let's say you tossed it straight upwards. A tiny instant before it reaches the exact top, it has a small upward speed. A tiny instant after it passes the exact top, it has a small downward speed. During that tiny space of time, its upward speed decreases and its downward speed increases. That's a downward acceleration in anybody's book.
Do you agree with the statement an object with a zero velocity can have an acceleration greater than zero?
Do you agree with the statement, "An object with a zero velocity can have an acceleration greater than zero."? Explain your answer.
When an object is thrown straight up into the air what is its acceleration when it is moving upward?
The acceleration at the top of the path will be the same as the acceleration at the moment the ball leaves the hand and all the way until the moment it hits the ground (or hand). Ignoring air resistance, the only force acting on the ball is gravity. so the acceleration is 'g' or approximately 9.81m/squared seconds in my part of the world. g depends on how close the ball is to the center of the earth.
Why acceleration due to gravity in water than less than outer side relation?
The acceleration due to gravity on or close to the earth's surface is always g, (981cm/s/s). An object can be restricted from achieving this in many ways eg putting it on a table top. Nobody asks why the acceleration due to gravity is zero on table tops. Water also restricts acceleration due to viscosity, which, as for parachutes in air, will be velocity dependent. So the short answer is, in water the object is in a restricting environment, unlike in free fall where the acceleration will be g.
Why does weight depend on where you are?
Weight is determined by mass x acceleration due to gravity. The mass of an object doesn't change; however, the acceleration due to gravity varies depending on the distance from the center of an object. A person weighs less on the top of a mountain than at the bottom of a valley. Gravity depends on the masses of the objects and the distance between them.
Can an object have zero velocity at the same time that it has acceleration?
Absolutely. That's exactly the situation of a rubber ball that was tossed straight up, at the instant when it's at the top of its arc. Any object that's not connected to anything else and is rising or falling has constant acceleration ... the acceleration of gravity. If it was originally launched upward, then it eventually runs out of steam, stops, reverses direction, and starts moving down. At that instant during its constant acceleration, its velocity is zero.
Why do you say the weight is a force?
Weight is determined by mass x acceleration due to gravity. The mass of an object doesn't change; however, the acceleration due to gravity varies depending on the distance from the center of an object. A person weighs less on the top of a mountain than at the bottom of a valley. Gravity depends on the masses of the objects and the distance between them.
