True: When skiing, streamlining reduces drag to improve speed., Thinner tyres on a bike reduce the surface contact to reduce friction., Thin blades on ice-skates reduce the surface contact to reduce friction., An example of streamlining in nature is a dolphin swimming., Raising the flaps on a plane as it lands increases the surface area and helps to slow it down., The large paws of polar bears help create more friction and so improve its grip as it walks across the ice., False: When skiing, streamlining increases drag to improve speed., Thinner tyres on a bike reduce the surface contact to increase friction., An example of streamlining in nature is a hippopotamus swimming., Putting snow chains on car tyres increases the surface area of the tyres which helps to increase the speed of the car., Increasing the surface area of the sole of walking boots helps to create friction so the boots have less grip., The wings of a hummingbird decrease its surface area to create less friction to help it hover.,

Friction - True or False

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