Final answer:
The claim about the force required to push a box up a ramp is false due to overlooking factors such as friction and ramp efficiency, and the idea that high-voltage wires are wrapped in insulating material is false as these wires are actually bare.
Step-by-step explanation:
The statement that a boy pushing a 300 N box up a 1.0 m high and 3.0 m long ramp was exerting a force of exactly 100 N is false. This is because the force required to move an object up a ramp is determined by the mechanical advantage of the ramp, which is the ratio of output force to input force. Since the ramp's height is 1.0 m and the length is 3.0 m, the mechanical advantage would be 3:1. However, this does not account for other factors such as friction and the efficiency of the ramp, which would influence the actual force needed. Similarly, the notion that high-voltage wires are wrapped in insulating material is also false. These wires are actually bare and are held aloft by insulating connectors to prevent the conduction of electricity to the ground through the poles.