Plz help i need answers to all these questions 1) On a flat surface: What is the net force of a 2kg box if team A is pulling with 20 N and team F is pulling back with 15 N?

Is the box accelerating? How much?

2) On a ramp: What is the net force of a 2kg box if it is on a ramp at a 30 degree angle and there is a force of friction 10 N?

Is the box accelerating?

What is the normal force

3) A 10 – kg box slides down a frictionless 18o ramp.

What is the acceleration of the box?

Under conditions for which the same room temperature is maintained by a heating or cooling system, it is not uncommon for a person to feel chilled in the winter but comfortable in the summer. provide a plausible explanation for this situation (with supporting calculations) by considering a room whose air temperature is maintained at 20â°c throughout the year, while the walls of the room are nominally at 27â°c and 14â°c in the summer and winter, respectively. the exposed surface of a person in the room may be assumed to be at a temperature of 32â°c throughout the year and to have an emissivity of 0.90. the coefficient associated with heat transfer by natural convection between the person and the room air is approximately 2 w/m2 â‹…â‹… k. what is the ratio of the thermal resistance due to convection to the thermal resistance due to radiation in the summer? what is the ratio of thermal resistances in the winter