BRAINCAKENewton's First Law of Motion
ΣF = 0
An object will continue to move at the same speed in the same direction (or if at rest will remain at rest) unless acted on by a resultant force.
An object moves at constant speed in a straight line if there is no resultant force acting on it.
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Key terms in this lesson
- resultant force
- The single force that has the same effect on an object as all the individual forces acting on it combined.
More in Motion
- The Moment of a Force
- Centre of Gravity
- Moments Question 1
- Moments Question 2
- Newton's Second Law of Motion
- Newton's Third Law of Motion
- Constant Acceleration
- Distance from Average Speed
All 31 lessons in Motion · All Edexcel AS-level Physics topics