Question

Suppose your writing desk is tilted a little a book kept on desk start sliding down show the direction of force acting on it​.

You spill a bucket of soapy water on a marble floor accidentally. Would it make it easier or more difficult for you to walk on the floor? Why?

Explain why sportsmen use shoes with spikes​

Answer 1

Explanation:

1.Frictional force always acts as opposite to the direction of motion.Force of friction will be always parallel to the two surfaces in contact.Thus, the direction of frictional force acting on the book is parallel to the tilted table & opposite to the direction of sliding of a book.

2.We are able to walk because of the friction present between our feet and the ground. In order to walk, we push the ground in the backward direction with our feet. The force of friction pushes it in the forward direction and allows us to walk. The force of friction between the ground and feet decreases when there is soapy water spilled on the floor. Hence, it becomes difficult to walk on the soapy floor.

3.Spikes increase the surface of the shoes & make it rough which results in an increase in friction. This helps to have more grip on the floor and chances to slip reduces. This makes it easy for sportsmen to walk or run as their grip on the ground increases.

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