What enables us to fix nails in a wall and knots to be tied ?

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Solution

It is the frictional force that allows us to fix a nail in a wall and a knot to be tied.

It is the friction between the surface of the nail and the wall that keeps the nail intact with the wall.

Even knots in the ropes are held together due to the force of friction.

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Question 95

Length and breadth of a bulletin board are r cm and t cm, respectively.

(i) What will be the length (in cm) of the aluminium strip required to frame the board, if 10 cm extra strip is required to fix it property.

(ii) If x nails are used to repair one board, then how many nails will be required to repair 15 such boards?

(iii) If 500 sq cm extra cloth per board is required to cover the edges, then what will be the total area of the cloth required to cover 8 such boards?

(iv) What will be the expenditure for making 23 boards, if the carpenter charges Rs. $x$ per board?

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What enables us to fix nails in a wall and knots to be tied ?

It is the frictional force that allows us to fix a nail in a wall and a knot to be tied. It is the friction between the surface of the nail and the wall that keeps the nail intact with the wall. Even knots in the ropes are held together due to the force of friction.

It is the frictional force that allows us to fix a nail in a wall and a knot to be tied.

It is the friction between the surface of the nail and the wall that keeps the nail intact with the wall.

Even knots in the ropes are held together due to the force of friction.