Question

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Answer 1

Answer:

Activity :-

Question 1. → Explain the lab activity to understand the nature of friction and concept of static friction?

Answer → An experimental study is conducted to measure the static friction which is the coefficient under constant normal load and different interface conditions. These are including surface roughness, dwell time, displacement of the rate, as well as the presence of the traces of lubricant and wear debris at the interface.

Assessment :-

Question 2. → Define static friction with an example.

Answer → Static friction is friction between two or more solid objects that are not moving relative to each other. For example, static friction can prevent an object from sliding down a sloped surface.

Question 3. → Define sliding friction with an example .

Answer → Rubbing both hands together to create heat. A sled sliding across snow or ice. Skis sliding against snow. A person sliding down a slide is an example of sliding friction. A coaster sliding against a table.

Fill in the blanks :-

4. ______ is a self-adjusting friction

Answer → Static friction

5. ______ friction comes into play when an object is sliding over another.

Answer → Static friction

6. The force which opposes the relative motion of two surfaces of bodies in contact is called ______

Answer → Friction

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