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Can you pls explain the cases in which friction supports the motion?

Can you pls explain the cases in which friction supports the motion?

Grade:12

2 Answers

vikas askiitian expert
509 Points
11 years ago

when a body(sphere , disk) is rolled with some angular velocity &  no linear velocity in a horizontal ground then friction acts in foreward direction & hence it acts as driving force ... it this case it supports the motion

Ritvik Gautam
85 Points
11 years ago

Walking is a good example...

Another example in which friction supports as well as opposes motion is a car...

while the friction due to front wheel supports the motion at the same time friction due to rear wheels opposes the motion...

 

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