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3 years ago

List 3 examples in which friction helps us or makes things easier in our daily life. Explain the effect of friction for each.

Physics

2 answers:

Kisachek [45]3 years ago

8 0

Friction can help us play tennis, knock down bowling pins, and cook dinner.

Free_Kalibri [48]3 years ago

5 0

The three examples in which friction helps us or makes things easier in our daily life are :

(a) Friction helps us to walk. if there were no friction, we wouldn't be able to push earth backwards by our feet . Thus we will not get the reaction force from earth which is necessary for walking.

(b) Conveyor belts will not work if there is no friction. Friction provides a grip for the conveyor belts to transfer motion from one part of a machine to another.

(c) Cars, buses and all locomotives will not be able to stop once they are set in motion if the friction was absent. friction provides a braking forces for these vehicles to stop.

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Answer:

$\boxed{\sf Kinetic \ energy \ (KE) = 85 \ J}$

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$\boxed{ \bold{\sf KE = \frac{1}{2} m {v}^{2} }}$

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$\sf \implies KE = \frac{1}{2} \times 6.8 \times {5}^{2}$

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