a block rests on a horizontal surface. the normal force is 20N. the coefficient of static friction between the block and the surface is 0,40 and the coefficient of dynamic friction is 0,20
c) what is the minimum force required to start the block moving
The minimum force required to start the block moving is the force of static friction.
The formula to calculate the force of static friction is:
Fs = μs × N
where Fs is the force of static friction, μs is the coefficient of static friction, and N is the normal force.
Substituting the given values:
Fs = 0.40 × 20N = 8N
Therefore, the minimum force required to start the block moving is 8N.