A box is placed on the floor of a truck moving with an acceleration of 7ms2.If the coeffecient of kenetic friction between the box and surface of the truck is 0.5,find the acceleration of the box relative to the truck
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With what minimum speed v must a small ball should be pushed inside a smooth vertical tube from a heoght h so that it may reach the top of the tube? Radius of the tube is R .
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