1 Formula 1 car accelerating from the starting grid 2 A cyclist braking 3 A satellite orbiting the Earth at constant speed 4 A person resting in an armchair 5 A lorry travelling at a constant speed on straight road Move on Isaac Newton, in his Laws of Motion, made statements about the effect of balanced and unbalanced forces. Newton's First Law is concerned with balanced forces. The First Law states that if a body is at rest and the forces acting on it are balanced then the body will remain at rest. However if the body is moving and the forces acting are balanced then the body will keep moving at constant speed in a straight line. Newton's Second Law is concerned with unbalanced forces.
Unbalanced forces produce acceleration.
The bigger the unbalanced force the bigger the acceleration. More questions Here are three diagrams showing the forces acting on moving things. Answer the questions next to each diagram. An aircraft is flying due north at a constant height and steady speed. The question gives us clear information about the motion.