A slingshot, consisting of a leather pouch attached to two rubber bands which are tied to the prongs of a wooden Y- shaped frame, is used to shoot a pebble horizontally. When the slingshot is stretched by a distance d, it gives the pebble speed v. What speed does it give the same pebble when it is stretched to distance 3d?

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.