Final answer:
The minimum force required to start the block moving is 14 N.
Step-by-step explanation:
To determine the minimum force required to start the block moving, we need to consider the frictional force acting on the block. The frictional force can be calculated using the equation F_friction = μ_s * N, where μ_s is the coefficient of static friction and N is the normal force.
In this case, the normal force N is equal to the weight of the block, which is mg. Therefore, N = 35 N.
Given that the coefficient of static friction μ_s is 0.40, the frictional force F_friction = 0.40 * 35 N = 14 N.
So, the minimum force required to start the block moving is equal to the frictional force, which is 14 N.