Water Resistance - Slowing down when diving into a swimming pool. , Air resistance - When riding a bicycle, air particles hit our body and make it harder to move. , Upthrust - Ice dropped in water starts to sink but then rises back to the top, Gravity - A ball kicked into the air will then be pulled back down to Earth. , Friction - It is easier to stop stop a car on a rough surface., Propulsion - A propeller helps to move a plane forward. ,

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