Final answer:
When you push your 60 kg friend on a skateboard with a force of 180 N, ignoring opposing forces, the friend's acceleration is 3 m/s².
Step-by-step explanation:
The question involves calculating the acceleration of a person on a skateboard by applying Newton's second law of motion. According to this law, the acceleration of an object is directly proportional to the net force acting upon it and inversely proportional to its mass. Here, if you push your 60 kg friend on a skateboard with a force of 180 N, the acceleration can be found using the formula a = F/m, where F is the force applied, and m is the mass of your friend. We must assume that all opposing forces like friction are negligible or have already been accounted for in the given force.
Using the given values, we can calculate acceleration as follows:
Acceleration (a) = Force (F) / Mass (m) = 180 N / 60 kg = 3 m/s²
Therefore, the acceleration of your friend on the skateboard is 3 m/s².