Question

Fill in the blanks.

1. When we increase the thickness of a vibrating string its pitch ___________ .

2. The smoothet the surface of the object ________ is the friction.

3. The static frictional force is ________ than kinetic frictional force.

4. The heavier the object, the ________ is the friction.

5. The frictinal force acts in the direction _________ to that of motion so it _________ the speed of a moving object.

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Answer 1

1. Decreases
2.
3. Stronger
4. Greater
5.