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please help explain.
Q1. People could not walk without friction. What friction are we talking about here, kinetic
friction or static friction? Q2. The word "push" is reasonably good synonym for the word
FORCE. Is "hold" a synonym for force? Q3. How about "support"? Q4. How many others can
you think of?
Solution
1. While walking friction force acting is static friction .. static friction acts when there is no
relative motion between two surfaces . Now as we push ground behind our feet doesn't move
behind ( as we do not skip) and same amount of force ground apply on our feet. So this behave
as a static friction.
2. Yes hold is also force which might oppose some other force .
3. Yes support is also a force as pillar is supporting the roof By applying upward force .
4. Air friction , magnetic force , electric force , nuclear force .

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please help explain- Q1- People could not walk without friction- What.docx

  • 1. please help explain. Q1. People could not walk without friction. What friction are we talking about here, kinetic friction or static friction? Q2. The word "push" is reasonably good synonym for the word FORCE. Is "hold" a synonym for force? Q3. How about "support"? Q4. How many others can you think of? Solution 1. While walking friction force acting is static friction .. static friction acts when there is no relative motion between two surfaces . Now as we push ground behind our feet doesn't move behind ( as we do not skip) and same amount of force ground apply on our feet. So this behave as a static friction. 2. Yes hold is also force which might oppose some other force . 3. Yes support is also a force as pillar is supporting the roof By applying upward force . 4. Air friction , magnetic force , electric force , nuclear force .