A wooden crate weighs 780lb.What force is needed to start the crate sliding on a wooden floor when the coefficient of starting friction is 0.40?
force= mu*weight
To calculate the force needed to start the crate sliding on a wooden floor, we will use the equation for friction force:
Friction force = coefficient of friction * normal force
First, we need to calculate the normal force acting on the crate. Normal force is the force exerted by a surface to support the weight of an object resting on it. In this case, the wooden crate is resting on a wooden floor, so the normal force is equal to the weight of the crate.
Given that the crate weighs 780 lb, the normal force is also 780 lb.
Now we can calculate the friction force:
Friction force = 0.40 * 780 lb
Friction force = 312 lb
Therefore, the force needed to start the crate sliding on the wooden floor is 312 lb.