A student has just started pulling hard enough for a crate to start accelerating into motion. At that particular instant, what is the net force on the crate if the force of friction has magnitude 200 N and the applied force is 225 N?
Fn = Fap - Ff = 225 - 200 = 25 N.
25 N.
To determine the net force on the crate, we need to understand the concept of force and how it affects the motion of an object. Newton's second law of motion states that the net force acting on an object is equal to the product of its mass and acceleration:
Net force (F_net) = mass (m) × acceleration (a)
In this case, the force of friction and the applied force are acting on the crate. Since the crate just starts to accelerate, we know that the applied force overcomes the force of friction:
F_applied > F_friction
Given that the force of friction is 200 N and the applied force is 225 N, we can calculate the net force on the crate as follows:
F_net = F_applied - F_friction
F_net = 225 N - 200 N
F_net = 25 N
Therefore, the net force on the crate at that particular instant is 25 Newtons.