Science

Friction

Question:

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?

Answer:

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.
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Questions and Answers

Friction

Q 1.

static, sliding, rolling
Answer

Q 2.

wet marble floor, dry marble floor, newspaper and towel
Answer

Q 3.

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.
Answer

Q 4.

Explain why sliding friction is less than static friction.
Answer

Q 5.

Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?
Answer

Q 6.

Give examples to show that friction is both a friend and a foe.
Answer

Q 7.

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?
Answer

Q 8.

Explain why objects moving in fluids must have special shapes.
Answer

Q 9.

Explain why sportsmen use shoes with spikes.
Answer