Forces Glossary The centre of gravity of an object is the point at which the weight of the object can be said to act. © Mike Benn, Graham George 2016.

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Presentation transcript:

Forces Glossary The centre of gravity of an object is the point at which the weight of the object can be said to act. © Mike Benn, Graham George 2016

Forces Glossary Gravitational field strength is the force per unit mass on an object placed in a gravitational field. © Mike Benn, Graham George 2016

Forces Glossary The moment of a force is the product of the force and the perpendicular distance between the axis of rotation and the line of action of the force. © Mike Benn, Graham George 2016

Forces Glossary Newton’s first law of motion states that an object will remain in a state of rest or continue to move with a constant velocity unless acted upon by a resultant external force. © Mike Benn, Graham George 2016

Forces Glossary Newton’s second law of motion states that the resultant force exerted on a body is directly proportional to the rate of change of linear momentum of the body. © Mike Benn, Graham George 2016

Forces Glossary Newton’s second law of motion for fixed masses states that the acceleration of a body of constant mass is proportional to the resultant force applied to it and in the direction of the resultant force. © Mike Benn, Graham George 2016

Forces Glossary Newton’s third law of motion states that if body A exerts a force on body B, body B will exert an equal and opposite force on body A. © Mike Benn, Graham George 2016

Forces Glossary The principle of moments states that if a system is in equilibrium, the sum of the clockwise moments must equal the sum of the anticlockwise moments. © Mike Benn, Graham George 2016