Suppose your writing table (or desk) is tilted a little. A book kept on the table starts sliding down. Draw a diagram to show the direction of force of friction acting on the book.

Academic Physics NCERT Class 8

Here below, a diagram is given to show a book sliding down from the tilted table and friction acting on the book.

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Updated on: 10-Oct-2022

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Suppose your writing desk is tilted a little. A book kept on it starts sliding down. Show the direction of frictional force acting on it.
A book is lying on the horizontal table top. If we tilt the table a little, then the book starts sliding down slowly. This happens because:(a) sliding friction is greater than static friction(b) sliding friction is less than force of gravity(c) static friction is greater than sliding friction(d) force of gravity is less than sliding friction
What is the direction of force of friction acting on a moving object?
A book of length 20 cm and breadth 6 cm is kept on a table. What is its area?
Which type of friction comes into play when a book kept on cylindrical pencils is moved by pushing?
A car is moving towards North. What will be the direction of force of friction acting on this car due to surface of road?
Each of the following statement describes a force acting. Which force is causing work to be done?(a) the weight of a book at rest on a table(b) the pull of a moving railway engine on its coaches(c) the tension in an elastic band wrapped around a parcel(d) the push of a person’s feet when standing on the floor
What kind of friction comes into play:(a) when a block of wood kept on table moves slowly?(b) when a block of wood kept on table just tends to move (or slip)?(c) when a block of wood kept on cylindrical iron rods moves?
To understand transparency of objects.You will need a book, butter paper and a piece of glass.Now, hold the book upright on a table and place your hand behind the book. Ask your friend if he is able to see your hand behind the bottle. Repeat the same with the butter paper and the glass piece. Record your friend's observations in the following table:ObjectObservationBookNot able to see the hand.Butter paper_____________________Glass piece_____________________
(a) What happens to the work done when the displacement of a body is at right angles to the direction of force acting on it? Explain your answer.(b) A force of $50\ N$ acts on a body and moves it a distance of $4\ m$ on a horizontal surface. Calculate the work done if the direction of force is at an angle of $60^{o}$ to the horizontal surface.

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