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Gravitational force (weight), pointing down.
Reaction force, equal to the gravitational force (weight), exerted by the tabletop, pointing up.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoThe forces acting on a book lying on a table are
a) The gravitational force W exerted by the earth
b) The contact force N that is the normal force by the table
These two forces are equal and opposite as seen in the inertial frame of reference and hence the book is lying stationery on the table with respect to the earth.
Wiki User
∙ 11y agoThis question assumes that the table's surface is perpendicular to the direction of gravity. If so, the net force is a combination of the coefficients of friction for both surfaces (book and table) minus the derivative (difference) of the initial acceleration (push) and final acceleration (should be a negative acceleration, the force of gravity and the "normal" force of the table.
Wiki User
∙ 8y ago
When a book is sitting on a table . . .
-- There is a gravitational force pulling the book 'down' toward the center of the Earth.
-- There is an equal gravitational force pulling the Earth 'up' toward the center of the book.
-- There may be some small force on the book caused by air currents in the room.
Wiki User
∙ 6y agoThe book on the table exerts a gravitic contact force downward.
Wiki User
∙ 12y agoThat is called friction.
Wiki User
∙ 12y agonormal force。
Wiki User
∙ 13y agoForces of Gravity and friction.
Wiki User
∙ 14y agoFriction.
Anonymous
normal force and the force of gravity
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How an object can have forces acting on it but not be accelerating?
Yes - if the sum of the forces is zero.Yes - if the sum of the forces is zero.Yes - if the sum of the forces is zero.Yes - if the sum of the forces is zero.
A book of mass 10kg rests on a holizontal table. What is the resultant of action and reaction forces if the book is stationery?
My, that is a fairly heavy book! Earth attracts the book with a force of 98 Newtons. Therefore, the book will also attract Earth with the same force. For the book to be in equilibrium, the table has to push the book up with a force of 98 Newtons. Therefore, the book also pushes down on the table, with a force of 98 Newtons.
What is a situation in which balanced forces are acting?
Well, that's a pretty broad question with many many many answers. Pretty much anytime you see something where nothing is happening, there are balanced forces at work. A book on a table, for example: The table is pushing up on the book with the same amount of force that the book is pushing down on the table. However, sometimes even when it appears that something IS happening, balanced forces can be found. For example, an airplane, in level flight (neither climbing nor decending) and is neither accelerating nor decelerating has 2 obvious pairs of balanced forces: Gravity and Lift are in balance, since the plane is neither ascending nor descending, and thrust and drag are in balance since it's neither accelerating nor decelerating.
What effect will balanced force have on a book?
If the forces are balanced, this implies that the net force on the book is 0. Therefore, using Newton's second law, F = ma, F = 0, and since the mass of the book is non-zero, a = 0. This means that the book is not accelerating in the direction of these forces. However, this DOES NOT mean that the book is stationary; it could be travelling at any CONSTANT velocity (since there is no acceleration).
Why do action reaction forces never cancel each other?
Because they are acting on different objects.The action and reaction forces - in the sense of Newton's Third Law - act on different objects. In some everyday situations, such as a book lying on a table, pressing down on the table, and the table pressing up on the book, these forces are balanced by additional forces, in other cases, they are not.Please note that "action" and "reaction" forces (from Newton's Third Law) act on different objects. Only forces acting on the same object may cancel out (for purposes of Newton's Second Law), if their vector sum happens to be zero.
Why a book lying on the table remains stationary?
Relative to the table, the book remains stationary because there are no outside forces acting on it except gravity which keeps it lying on the table.
Think Critically A book resting on a table slows down and comes to a stop Explain whether the forces acting acting on the book are balanced or unbalanced?
As long as the book's velocity changes, there is a net forces acting on it - in other words, the forces are unbalanced. By the way ... How exactly does a book that is resting on a table slow down and come to a stop ?
If a book remains stationary on a table are the forces acting upon the book in equilibrium what is the resultant of the force acting upon the book?
All of the forces together balance out. The resultant of the forces is therefore nil. That applies to all equilibrium.
Would a book falling off a table be a balanced force?
The force of gravity causes a book to fall, but someone has to push it to the edge of the desk, or off the desk so that the force of gravity is greater than the normal force acting on the book.
Why wont a book resting on a table fall to the ground What forces are acting on the book?
The book will not fall to the ground because of the force of gravity pulling it down and the normal force exerted by the table pushing it up. These two forces are equal and opposite, resulting in a balanced system where the book remains stationary.
Are the forces acting on the book?
book motion
Think Critically A book sliding across a table slows down and comes to a stop Explain whether the forces acting acting on the book are balanced or unbalanced.?
The forces are unbalanced. The force of Friction is obviously greater than whatever force is pushing the book in the direction of travel, if one is pushing it at all. If the forces on the book were balanced, the book would continue to slide with a constant velocity.
7 If an object has no acceleration can you conclude that no forces are exerted on it?
No. There may be forces on the body but they are balanced so that the net force is zero. For example a plate on a table is not accelerating but there is a gravity force towards the earth and the table creates a balancing force. Thus the plate just sets there not accelerating. This Newton's Third Law in action.
Are there forces acting on the pen book?
Yes, there are forces acting on both the pen and the book. When the pen is placed on the book, the force of gravity is acting on both objects, pulling them downwards. Additionally, there may be contact forces between the pen and the book depending on how they are positioned.
Are there forces acting on the books?
book motion
If a book is placed on top of the table are there forces acting on the book?
Yes. For a start, gravity pulls it down. Also, the table pushes up on the book, thus canceling the force of gravity.
Does the book on the table have a force acting on it going upwards if no why or yes?
For example, if the book is resting on a table, gravity pulls the book down, and the table pushes the book up.
