Question

You were pushing a 1 kg train across the flat ground to the right with a force of 5N. The kinetic coefficient of friction of the ground is 0.2. Use this information to answer the following questions.μ_k=0.2

A) The net force acting on the train is 4 N to the right.
B) The net force acting on the train is 5 N to the right.
C) The net force acting on the train is 6 N to the right.
D) The net force acting on the train is 3 N to the right.

Answer 1

To find the net force on the train, subtract the frictional force (1.96N) from the applied force (5N), which gives approximately 3.04N to the right, rounded to 3 N as per the given options.

Step-by-step explanation:

The question provided involves calculating the net force acting on a train toy being pushed across flat ground. When a force of 5N is applied to a 1 kg train with a kinetic friction coefficient (μ_k) of 0.2, we first need to find the force of friction. This force is calculated by multiplying the coefficient of friction by the normal force (which equals the weight of the object on a horizontal surface). In this case, frictional force = μ_k × mass × gravity = 0.2 × 1 kg × 9.8 m/s² = 1.96 N. The net force would then be the applied force minus the frictional force, which gives us 5N - 1.96N, resulting in an approximate net force of 3.04 N to the right, which rounds to 3 N when choosing an answer from given options.