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Friction - GCSE Physics Definition

Reviewed by: Philippa Platt

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Friction is a force that opposes the motion of objects or surfaces that are in contact with each other. It acts in the opposite direction to the movement, causing objects to slow down or stop.

Friction arises due to the irregularities on the surfaces of objects, which interlock when they slide over each other. It is an essential concept in GCSE Physics as it helps explain everyday phenomena, such as why a car tyres can grip the road or why it's harder to slide a heavy box across a floor.

Friction can be reduced using lubricants or made greater by increasing the roughness of the surfaces in contact.

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Philippa Platt

Reviewer: Philippa Platt

Expertise: Chemistry Content Creator

Philippa has worked as a GCSE and A level chemistry teacher and tutor for over thirteen years. She studied chemistry and sport science at Loughborough University graduating in 2007 having also completed her PGCE in science. Throughout her time as a teacher she was incharge of a boarding house for five years and coached many teams in a variety of sports. When not producing resources with the chemistry team, Philippa enjoys being active outside with her young family and is a very keen gardener

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