A pulley
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A dike is not a machine, it does not change the direction of any force or amplify any force, it is merely an obstacle to the flow of water.
a simple machine made of a flat sloping surface wrapped around a small rod. a simple machine made of a flat sloping surface wrapped around a small rod.
It means to shut off the water feed to the washing machine.
ground
water is the ground for ships ,and the salt water is the best conductor and it acts as a zero potential(like for us ground as) for ships.