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For each problem, we provide a step-by-step guide on how to solve it. Learn what the resultant force (also known as net force) is, and how to find it when an object is subject to parallel forces as well as non-parallel forces with the help of examples.
The force arising when an object rests against another object acting at a 90° angle to the plane of contact. It is sometimes also referred to as the reaction force. This is normally labelled as N or R on free body diagrams. This force arises from Newton's Third Law.
Q1. A bike is accelerating on a flat, straight road. How would the free-body diagram represent this? Q2. What two things does a free-body diagram tell us about the forces acting on a body? . Q3. A child is learning to ride a bike while her mum runs alongside, pushing and keeping her upright. How would you calculate the resultant force on the bike?
A resultant force is the overall force that acts on the object. Remember that forces are vectors. When you calculate the resultant force you need to also say the direction it is acting in.
A resultant force is a single force that describes all of the forces operating on a body. When multiple forces act on one object, the forces can be combined to produce one net force that describes the combined action of all of the forces. This single resultant force determines:
How can you mathematically model the effect of force FH at point O? Moment of a force – scalar formulation. The moment of a force about a point provides a measure of the tendency for rotation. (sometimes called a torque). Magnitude: In a 2-D case, the magnitude of the moment is Mo = F d.
On the grid below draw a scale diagram to determine the resultant force acting on the body. Use a scale of 1 cm to 1 N.
