If you push a heavy box along the floor, you must work against the force of friction. Friction force x Distance moved . The friction force is equal to the weight of the object times a number called the coefficient of friction . This number is dependent on the materials involved. In conclusion Work is required to act against resistive forces, such as friction, air resistance, and gravity.
Work is force times distance against resistance.
Machines are used to gain a mechanical advantage against the force of resistance. The next topic is The Resistive Force of Friction . Benefit others by applying your knowledge of science. Strength to push a heavy object Force needed to overcome friction times distance Force to move an object in any direction 2. Gravity will slow object that is going up 3.